顔写真

PHOTO

Sugahara Takeshi
菅原　武
Sugahara Takeshi
菅原　武
Institutional repository
Graduate School of Engineering Science　Department of Materials Engineering Science, Assistant Professor

keyword latent heat storage material，hydrogen hydrate，methane hydrate，semiclathrate hydrate，Solution structure，Clathrate compound，Raman spectroscopy，Gas hydrate，Applied Physical Chemistry，Chemical Engineering，high-pressure phase equilibria

Institutional repository

Research History 4

  1. 2007/04 - Present
    Osaka University　Graduate School of Engineering Science　Assistant Professor

  2. 2016/04 - 2019/03
    National Institute of Advanced Industrial Science and Technology

  3. 2008 - 2009
    Colorado School of Mines, Visiting Research Scholar

  4. 2001/04 - 2007/03
    Osaka University　Graduate School of Engineering Science　Assistant Professor(Research)

Committee Memberships 5

  1. Japanese Society of Latent Heat Engineers　Board member　Academic society

    2021/12 - Present

  2. Division of Physical Properties, The Society of Chemical Engineers, Japan　Board member　Academic society

    2016/05 - Present

  3. Japanese Society of Latent Heat Engineers (past)　Board member　Academic society

    2018/12 - 2021/12

  4. ガスハイドレート産業創出イノベーション(GHIC)　幹事　Academic society

    2016/04 - 2019/03

  5. American Chemical Society (ACS)　Editorial Advisory Board of the Journal of Chemical & Engineering Data　Academic society

    2015/01 - 2017/12

Professional Memberships 5

  1. Japanese Society of Latent Heat Engineers

  2. THE JAPAN INSTITUTE OF ENERGY

  3. American Chemical Society

  4. THE JAPAN SOCIETY OF HIGH PRESSURE SCIENCE AND TECHNOLOGY

  5. THE SOCIETY OF CHEMICAL ENGINEERS, JAPAN

Research Areas 5

  1. Nanotechnology/Materials / Energy chemistry /

  2. Nanotechnology/Materials / Green/sustainable/environmental chemistry /

  3. Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Chemical reaction and process system engineering /

  4. Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Transfer phenomena and unit operations /

  5. Nanotechnology/Materials / Basic physical chemistry /

Awards 2

  1. "HISHO 30" The Top Thirty Young Researchers of Osaka University

    SUGAHARA Takeshi　Osaka University　2010/10

  2. Prize for encouragement

    The Japan Society of High Pressure Science and Technology　2005

Papers 119

  1. The moment of initial crystallization captured on functionalized nanoparticles

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    Communications Materials　Vol. 2　No. 1　p. 66-1-66-7　2021/06/18　Research paper (scientific journal)

    Publisher: Springer Science and Business Media {LLC}

  2. Colossal barocaloric effects in plastic crystals.

    Bing Li, Yukinobu Kawakita, Seiko Ohira-Kawamura, Takeshi Sugahara, Hui Wang, Jingfan Wang, Yanna Chen, Saori I Kawaguchi, Shogo Kawaguchi, Koji Ohara, Kuo Li, Dehong Yu, Richard Mole, Takanori Hattori, Tatsuya Kikuchi, Shin-Ichiro Yano, Zhao Zhang, Zhe Zhang, Weijun Ren, Shangchao Lin, Osami Sakata, Kenji Nakajima, Zhidong Zhang

    Nature　Vol. 567　No. 7749　p. 506-510　2019/03　Research paper (scientific journal)

  3. Enclathration of Ethane, Propane, and Propylene into Urea Clathrates and Roles of Methanol on Urea Clathrate Formation

    Takahiro Yamazaki, Tomohiro Tanabe, Takeshi Sugahara

    ACS Omega　Vol. 3　No. 10　p. 13154-13159　2018/10/31　Research paper (scientific journal)

  4. Large-Cage Occupancies of Hydrogen in Binary Clathrate Hydrates Dependent on Pressures and Guest Concentrations

    Takeshi Sugahara, Joanna C. Haag, Ashleigh A. Warntjes, Pinnelli S. R. Prasad, E. Dendy Sloan, Carolyn A. Koh, Amadeu K. Sum

    JOURNAL OF PHYSICAL CHEMISTRY C　Vol. 114　No. 35　p. 15218-15222　2010/09　Research paper (scientific journal)

  5. Increasing Hydrogen Storage Capacity Using Tetrahydrofuran

    Takeshi Sugahara, Joanna C. Haag, Pinnelli S. R. Prasad, Ashleigh A. Warntjes, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　Vol. 131　No. 41　p. 14616-+　2009/10　Research paper (scientific journal)

  6. Phase equilibria of carbon dioxide + sulfur hexafluoride mixed gas hydrate as fundamental data toward improving the mechanical properties of marine sediments

    Tasuku Ishikawa, Takeshi Sugahara, Takayuki Hirai, Norimasa Yoshimoto

    Fluid Phase Equilibria　Vol. 599　p. 114525-1-114525-7　2026/01　Research paper (scientific journal)

  7. Solving the 80-Year Structure Mystery: Definitive Crystal Structure of TBAB Hydrate Resolved with Synchrotron Radiation

    Sanehiro Muromachi, Nobuhiro Yasuda, Hiroyasu Masunaga, Takeshi Sugahara, Hironobu Machida

    Crystal Growth & Design　2025/07/18　Research paper (scientific journal)

  8. Tetra-n-butylammonium Tricarboxylate Semiclathrate Hydrates as Phase Change Materials: Phase Equilibrium Relations and Memory Effect in Reformation

    Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara, Takayuki Hirai

    Energy & Fuels　2025/04/10　Research paper (scientific journal)

  9. Transmission Electron Microscopy Imaging of Cluster Unit Dissolution from a Single Crystal of Tetra-n-butylammonium Fluoride Semiclathrate Hydrate for Latent-Heat Storage Material

    Hironobu Machida, Takeshi Sugahara, Hideki Hata, Tomohiko Ueda, Tomoya Yamazaki, Yuki Kimura

    ACS Applied Nano Materials　Vol. 8　No. 12　p. 5919-5925　2025/03/28　Research paper (scientific journal)

  10. Effect of Anions on the Memory Effect in the Tetra-n-butylammonium Dicarboxylate Semiclathrate Hydrate Reformation

    Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara, Takayuki Hirai

    Industrial & Engineering Chemistry Research　Vol. 63　No. 43　p. 18435-18440　2024/10/21　Research paper (scientific journal)

    Publisher: American Chemical Society (ACS)

  11. Introduction of Cyclic Structures into Phosphonium Salts As Potential Guest Substances for Ionic Clathrate Hydrates

    Keigo Kawabata, Sakura Azuma, Jin Shimada, Yusuke Tsuchida, Katsuhiko Tsunashima, Takeshi Sugahara, Atsushi Tani

    ECS Transactions　Vol. 114　No. 6　p. 75-79　2024/09/27　Research paper (scientific journal)

    Publisher: The Electrochemical Society

  12. Isothermal Phase Equilibria of the CH4+CO2 Mixed-Gas Hydrate System for CO2 Capture and Storage in a Reservoir after CH4 Hydrate Exploitation

    Rintaro Miyatake, Takeshi Sugahara, Tasuku Ishikawa, Motoi Oshima, Yusuke Jin, Takayuki Hirai

    Journal of Chemical & Engineering Data　Vol. 69　p. 3210-3216　2024/08/29　Research paper (scientific journal)

    Publisher: American Chemical Society (ACS)

  13. Effects of Halide Anions on the Electrical Conductivity in Single-Crystalline Tetra-n-butylammonium Salt Semiclathrate Hydrates

    Jin Shimada, Takeshi Sugahara, Atsushi Tani, Takahiro Ueda, Riko Tsugaya, Katsuhiko Tsunashima, Takayuki Hirai

    Energy & Fuels　Vol. 38　p. 6471-6477　2024/04/04　Research paper (scientific journal)

  14. Giant adiabatic temperature change and its direct measurement of a barocaloric effect in a charge-transfer solid

    Shin-ichi Ohkoshi, Kosuke Nakagawa, Marie Yoshikiyo, Asuka Namai, Kenta Imoto, Yugo Nagane, Fangda Jia, Olaf Stefanczyk, Hiroko Tokoro, Junhao Wang, Takeshi Sugahara, Kouji Chiba, Kazuhiko Motodohi, Kazuo Isogai, Koki Nishioka, Takashi Momiki, Ryu Hatano

    Nature Communications　Vol. 14　No. 1　2023/12/27　Research paper (scientific journal)

    Publisher: Springer Science and Business Media LLC

  15. Separation of Propane and Propylene by Urea Clathrate Formation

    Ryosuke Kobatake, Takeshi Sugahara, Takayuki Hirai

    Industrial & Engineering Chemistry Research　Vol. 62　p. 21380-21384　2023/12/13　Research paper (scientific journal)

  16. Thermodynamic Properties of Tetra-n-butylammonium and Tetra-n-butylphosphonium Hydroxycarboxylate Semiclathrate Hydrates

    Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara, Takayuki Hirai

    Journal of Chemical & Engineering Data　Vol. 68　No. 12　p. 3492-3498　2023/11/30　Research paper (scientific journal)

    Publisher: American Chemical Society (ACS)

  17. Quasi-Elastic Neutron Scattering Studies on Fast Dynamics of Water Molecules in Tetra-n-butylammonium Bromide Semiclathrate Hydrate

    Jin Shimada, Atsushi Tani, Takeshi Yamada, Takeshi Sugahara, Takayuki Hirai, Takuo Okuchi

    Applied Physics Letters　Vol. 123　No. 4　p. 044104-1-6　2023/07/26　Research paper (scientific journal)

    Publisher: AIP Publishing

  18. Proton conduction in tetra-n-butylammonium bromide semiclathrate hydrate

    Jin Shimada, Yuta Takaoka, Takahiro Ueda, Atsushi Tani, Takeshi Sugahara, Katsuhiko Tsunashima, Hirohisa Yamada, Takayuki Hirai

    Solid State Ionics　Vol. 393　p. 116188-116188　2023/05　Research paper (scientific journal)

    Publisher: Elsevier BV

  19. Peritectic phase behavior of tetra-n-butylphosphonium trifluoroacetate semiclathrate hydrate

    Jin Shimada, Masami Shimada, Sakura Azuma, Takeshi Sugahara, Katsuhiko Tsunashima, Takayuki Hirai

    Fluid Phase Equilibria　Vol. 567　p. 113727-113727　2023/04　Research paper (scientific journal)

    Publisher: Elsevier BV

  20. Effect of introducing a cyclobutylmethyl group into an onium cation on the thermodynamic properties of ionic clathrate hydrates

    Sakura Azuma, Jin Shimada, Katsuhiko Tsunashima, Takeshi Sugahara, Takayuki Hirai

    New Journal of Chemistry　Vol. 47　No. 1　p. 231-237　2023/01　Research paper (scientific journal)

    Publisher: Royal Society of Chemistry (RSC)

  21. Supercooling suppression in the tetrahydrofuran clathrate hydrate formation

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    CrystEngComm　Vol. 24　No. 38　p. 6730-6738　2022/10　Research paper (scientific journal)

    Publisher: Royal Society of Chemistry (RSC)

  22. Equilibrium Phase Relations and Dissociation Enthalpies of Tri-n-butylalkenylphosphonium Bromide Semiclathrate Hydrates

    Sakura Azuma, Jin Shimada, Katsuhiko Tsunashima, Takeshi Sugahara, Atsushi Tani, Takayuki Hirai

    Journal of Chemical & Engineering Data　Vol. 67　No. 6　p. 1415-1420　2022/06/09　Research paper (scientific journal)

    Publisher: American Chemical Society (ACS)

  23. Pressure-induced evolution in the durability of nickel–metal hydride batteries under high-current charge

    Kouji Maeda, Masato Moritoki, Shinji Yae, Keisuke Fukui, Naoki Fukumuro, Takeshi Sugahara

    Physical Chemistry Chemical Physics　Vol. 24　No. 22　p. 14085-14091　2022/06　Research paper (scientific journal)

    Publisher: Royal Society of Chemistry (RSC)

  24. Thermodynamic Properties of Tetra-n-butylphosphonium Dicarboxylate Semiclathrate Hydrates

    Jin Shimada, Moe Yamada, Atsushi Tani, Takeshi Sugahara, Katsuhiko Tsunashima, Yusuke Tsuchida, Takayuki Hirai

    Journal of Chemical & Engineering Data　Vol. 67　No. 1　p. 67-73　2022/01　Research paper (scientific journal)

    Publisher: American Chemical Society (ACS)

  25. Phase equilibrium temperature and dissociation enthalpy in the tri-n-butylalkylphosphonium bromide semiclathrate hydrate systems

    Jin Shimada, Masami Shimada, Takeshi Sugahara, Katsuhiko Tsunashima, Yuta Takaoka, Atsushi Tani

    Chemical Engineering Science　Vol. 236　p. 116514-116514　2021/06　Research paper (scientific journal)

    Publisher: Elsevier {BV}

  26. Calorimetric and Small-Angle X-ray Scattering Studies on the Memory Effect in the Tetra-n-butylammonium Bromide Semiclathrate Hydrate System

    Hironobu Machida, Takeshi Sugahara, Hiroyasu Masunaga, Izumi Hirasawa

    Journal of Crystal Growth　Vol. 533　p. 125476-1-6　2020/03　Research paper (scientific journal)

  27. Thermodynamic Properties of Tetra-n-butylammonium 2-Ethylbutyrate Semiclathrate Hydrate for Latent Heat Storage

    Takeshi Sugahara, Hironobu Machida, Sanehiro Muromachi, Norio Tenma

    International Journal of Refrigeration　Vol. 106　p. 113-119　2019/10　Research paper (scientific journal)

  28. Phase Equilibrium Relations for Tetra-n-Butylphosphonium Acetate Semiclathrate Hydrate Systems in the Presence of Methane, Carbon Dioxide, Nitrogen, or Ethane

    Masami Shimada, Jin Shimada, Takeshi Sugahara, Katsuhiko Tsunashima

    Fluid Phase Equilibria　Vol. 488　p. 48-53　2019/06　Research paper (scientific journal)

  29. Preparation of Dispersed Metal Nanoparticles in the Aqueous Solution of Metal Carboxylate and the Tetra-n-butylammonium Carboxylate

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    Journal of Crystal Growth　Vol. 514　p. 14-20　2019/05　Research paper (scientific journal)

  30. Phase equilibrium relations of tetra-n-butylphosphonium propionate and butyrate semiclathrate hydrates

    Jin Shimada, Masami Shimada, Takeshi Sugahara, Katsuhiko Tsunashima

    Fluid Phase Equilibria　Vol. 485　p. 61-66　2019/04　Research paper (scientific journal)

    Publisher: Elsevier {BV}

  31. Phase Equilibrium Relations of Semiclathrate Hydrates Based on Tetra-n-butylphosphonium Formate, Acetate, and Lactate

    Jin Shimada, Masami Shimada, Takeshi Sugahara, Katsuhiko Tsunashima, Atsushi Tani, Yusuke Tsuchida, Masahiko Matsumiya

    Journal of Chemical & Engineering Data　Vol. 63　No. 9　p. 3615-3620　2018/09　Research paper (scientific journal)

    Publisher:

  32. Memory effect in tetra-: N -butyl ammonium bromide semiclathrate hydrate reformation: The existence of solution structures after hydrate decomposition

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    CrystEngComm　Vol. 20　No. 24　p. 3328-3334　2018　Research paper (scientific journal)

    Publisher: Royal Society of Chemistry

  33. Scanning Electron Microscopic Studies on the Methane Hydrate Decomposition Using the Freeze-Fracture Replica Method

    Ayumi Fujimoto, Takeshi Sugahara

    Bulletin of Glaciological Research　Vol. 35　p. 39-45　2017/12　Research paper (scientific journal)

  34. Relationship between supercooling stability and solution structure in sodium acetate aqueous solution

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    JOURNAL OF CRYSTAL GROWTH　Vol. 475　p. 295-299　2017/10　Research paper (scientific journal)

  35. Dissociation and Nucleation of Tetra-n-butyl Ammonium Bromide Semi-Clathrate Hydrates at High Pressures

    Takeshi Sugahara, Hironobu Machida

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 62　No. 9　p. 2721-2725　2017/09　Research paper (scientific journal)

  36. Four-Phase Equilibrium Relations Including Clathrate Hydrate Phase in a Ternary System of Xenon, Benzene, and Water

    Takeshi Sugahara

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 61　No. 12　p. 4057-4060　2016/12　Research paper (scientific journal)

  37. Phase behavior of ethane hydrate system in the presence of ammonium bromide

    Tatsuya Bando, Takeshi Sugahara

    FLUID PHASE EQUILIBRIA　Vol. 413　p. 36-40　2016/04　Research paper (scientific journal)

  38. In Situ Raman Spectroscopic Studies on Small-Cage Occupancy of Methane in the Simple Methane and Methane plus Deuterated Tetrahydrofuran Mixed Hydrates

    Caroline T. Moryama, Takeshi Sugahara, Danilo Y. Yatabe Franco, Hiroko Mimachi

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 60　No. 12　p. 3581-3587　2015/12　Research paper (scientific journal)

  39. High-Pressure Phase Equilibria of Tertiary-Butylamine Hydrates with and without Hydrogen

    Tomohiro Tanabe, Takeshi Sugahara, Kazuma Kitamura, Takahiro Yamazaki, Takashi Fujimoto, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 60　No. 2　p. 222-227　2015/02　Research paper (scientific journal)

  40. Blue-Colored tert-Butylamine Clathrate Hydrate

    Atsushi Tani, Satoshi Koyama, Yusuke Urabe, Kenji Takato, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF PHYSICAL CHEMISTRY B　Vol. 118　No. 47　p. 13409-13413　2014/11　Research paper (scientific journal)

  41. Synergistic Formation of Carboxyl and Methyl Radicals in CO2 + Methane Mixed Gas Hydrates

    Motoi Oshima, Kazuma Kitamura, Atsushi Tani, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF PHYSICAL CHEMISTRY B　Vol. 118　No. 47　p. 13435-13439　2014/11　Research paper (scientific journal)

  42. Nucleophilic Reactions of Bromocyclopentane in the Structure-H Methane plus Bromocyclopentane Mixed Hydrate System at High Pressures

    Yuuki Matsumoto, Yoshito Katsuta, Fumitaka Kamo, Tatsuya Bando, Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF PHYSICAL CHEMISTRY B　Vol. 118　No. 47　p. 13404-13408　2014/11　Research paper (scientific journal)

  43. Thermodynamic Stability Boundaries and Structures of Methane plus Monohalogenated Cyclopentane Mixed Hydrates

    Yuuki Matsumoto, Hiroaki Matsukawa, Fumitaka Karno, Young Bae Jeon, Yoshito Katsuta, Tatsuya Bando, Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 59　No. 7　p. 2294-2297　2014/07　Research paper (scientific journal)

  44. Investigating the Thermodynamic Stabilities of Hydrogen and Methane Binary Gas Hydrates

    Yuuki Matsumoto, R. Gary Grim, Naveed M. Khan, Takeshi Sugahara, Kazunari Ohgaki, E. Dendy Sloan, Carolyn A. Koh, Amadeu K. Sum

    JOURNAL OF PHYSICAL CHEMISTRY C　Vol. 118　No. 7　p. 3783-3788　2014/02　Research paper (scientific journal)

  45. Reactions of HOCO radicals through hydrogen-atom hopping utilizing clathrate hydrates as an observational matrix

    Motoi Oshima, Atsushi Tani, Takeshi Sugahara, Katsuhisa Kitano, Kazunari Ohgaki

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS　Vol. 16　No. 8　p. 3792-3797　2014　Research paper (scientific journal)

  46. Phase equilibrium relations for binary mixed hydrate systems composed of carbon dioxide and cyclopentane derivatives

    Yuuki Matsumoto, Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    FLUID PHASE EQUILIBRIA　Vol. 362　p. 379-382　2014/01　Research paper (scientific journal)

  47. In situ Raman spectra of hydrogen in large cages of hydrogen+tetrahydrofuran mixed hydrates

    Akio Nishikawa, Tomohiro Tanabe, Kazuma Kitamura, Yuuki Matsumoto, Kazunari Ohgaki, Takeshi Sugahara

    Chemical Engineering Science　Vol. 101　p. 1-4　2013/09/20　Research paper (scientific journal)

    Publisher: Elsevier Ltd

  48. Enclathration of 2,3,3,3-tetrafluoropropene into structure-II hydrate with methane

    Yoshito Katsuta, Shunsuke Hashimoto, Teruo Kido, Takeshi Sugahara, Kazunari Ohgaki

    Journal of Chemical and Engineering Data　Vol. 58　No. 9　p. 2596-2599　2013/09/12　Research paper (scientific journal)

  49. Structure-H methane + 1,1,2,2,3,3,4-heptafluorocyclopentane mixed hydrate at pressures up to 373 MPa

    Sumihiro Suzuki, Yuuki Matsumoto, Yoshito Katsuta, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    Journal of Physical Chemistry A　Vol. 117　No. 20　p. 4338-4341　2013/05/23　Research paper (scientific journal)

  50. Phase equilibrium relations and structural transition in the 1,1,1,2-tetrafluoroethane hydrate system

    Yoshito Katsuta, Sumihiro Suzuki, Yuuki Matsumoto, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    Journal of Chemical and Engineering Data　Vol. 58　No. 5　p. 1378-1381　2013/05/09　Research paper (scientific journal)

  51. Isothermal Phase Equilibria for the CO2+1,1,1,2-Tetrafluoroethane and CO2+1,1-Difluoroethane Mixed-Gas Hydrate Systems

    Sumihiro Suzuki, Kenjiro Yasuda, Yoshito Katsuta, Yuuki Matsumoto, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 58　No. 3　p. 780-784　2013/03　Research paper (scientific journal)

  52. Fast and reversible hydrogen storage in channel cages of hydroquinone clathrate

    Kyu Won Han, Yun-Je Lee, Jin Seok Jang, Tae-In Jeon, Jeasung Park, Taro Kawamura, Yoshitaka Yamamoto, Takeshi Sugahara, Thomas Vogt, Jong-Won Lee, Yongjae Lee, Ji-Ho Yoon

    CHEMICAL PHYSICS LETTERS　Vol. 546　p. 120-124　2012/09　Research paper (scientific journal)

  53. Intermolecular Hydrogen Transfer in Isobutane Hydrate

    Naohiro Kobayashi, Takashi Minami, Atsushi Tani, Mikio Nakagoshi, Takeshi Sugahara, Kei Takeya, Kazunari Ohgaki

    ENERGIES　Vol. 5　No. 6　p. 1705-1712　2012/06　Research paper (scientific journal)

  54. Isothermal phase equilibria for the (HFC-32+HFC-134a) mixed-gas hydrate system

    Hiroshi Miyauchi, Kenjiro Yasuda, Yuuki Matsumoto, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF CHEMICAL THERMODYNAMICS　Vol. 47　p. 1-5　2012/04　Research paper (scientific journal)

  55. Isothermal phase equilibria for the (xenon plus cyclopropane) mixed-gas hydrate system

    Takeshi Sugahara, Hiroshi Miyauchi, Sumihiro Suzuki, Yuuki Matsumoto, Kenjiro Yasuda, Takashi Makino, Kazunari Ohgaki

    JOURNAL OF CHEMICAL THERMODYNAMICS　Vol. 47　p. 13-16　2012/04　Research paper (scientific journal)

  56. Intermolecular Hydrogen Transfer between Guest Species in Small and Large Cages of Methane plus Propane Mixed Gas Hydrates

    Takeshi Sugahara, Yusuke Kobayashi, Atsushi Tani, Tatsuya Inoue, Kazunari Ohgaki

    JOURNAL OF PHYSICAL CHEMISTRY A　Vol. 116　No. 10　p. 2405-2408　2012/03　Research paper (scientific journal)

  57. Thermodynamic stability of hydrogen plus tetra-n-butyl phosphonium bromide mixed semi-clathrate hydrate

    Yuuya Fujisawa, Takaaki Tsuda, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 68　No. 1　p. 660-662　2012/01　Research paper (scientific journal)

  58. High-Pressure Phase Equilibrium and Raman Spectroscopic Studies on the 1,1-Difluoroethane (HFC-152a) Hydrate System

    Takeshi Sugahara, Aki Endo, Hiroshi Miyauchi, Seung An Choi, Yuuki Matsumoto, Kenjiro Yasuda, Shunsuke Hashimoto, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 56　No. 12　p. 4592-4596　2011/12　Research paper (scientific journal)

  59. Structural phase transitions of methane+ethane mixed-gas hydrate induced by 1,1-dimethylcyclohexane

    Yuuki Matsumoto, Hiroshi Miyauchi, Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 66　No. 12　p. 2672-2676　2011/06　Research paper (scientific journal)

  60. In-situ ESR Observation of Free Radicals in Gas Hydrates under High Pressure

    Atsushi Tani, Kenji Takato, Takeshi Sugahara, Kazunari Ohgaki, Kei Takeya

    Physics and Chemistry of Ice 2010　Vol. 2010　p. 273-276　2011/04　Research paper (scientific journal)

    Publisher: Hokkaido University Press

  61. Thermal Stability of Radicals Induced in Xenon Hydrate

    Kei Takeya, Atsushi Tani, Takeshi Sugahara, Kazunari Ohgaki

    Physics and Chemistry of Ice 2010　Vol. 2010　p. 267-271　2011/04　Research paper (scientific journal)

    Publisher: Hokkaido University Press

  62. Decay Mechanisms of Radiation-Induced Radicals in Sulfur Hexafluoride Clathrate Hydrate

    Kenji Takato, Atsushi Tani, Takeshi Sugahara, Kei Takeya, Kazunari Ohgaki

    Physics and Chemistry of Ice 2010　Vol. 2010　p. 261-266　2011/04　Research paper (scientific journal)

    Publisher: Hokkaido University Press

  63. Effect of Cyclopentane on Cage Occupancy of Hydrogen in Clathrate Hydrates

    Takaaki Tsuda, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    Physics and Chemistry of Ice　Vol. 2010　p. 277-281　2011/04　Research paper (scientific journal)

    Publisher: Hokkaido University Press

  64. Large-Cage Occupancies of Molecular Hydrogen in Binary Clathrate Hydrates Dependent on Pressures

    Takeshi Sugahara, Pinnelli S.R. Prasad, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh, Kazunari Ohgaki

    Physicas and Chemistry of Ice　Vol. 2010　p. 117-125　2011/04　Research paper (scientific journal)

    Publisher:

  65. Raman Spectroscopic Analysis of Mixed Gas Hydrate Crystals

    Hiroko Mimachi, Masahiro Takahashi, Toru Iwasaki, Takahiro Kinoshita, Takeshi Sugahara, Hiroshi Sato, Kazunari Ohgaki

    Physicas and Chemistry of Ice　Vol. 2010　p. 243-247　2011/04　Research paper (scientific journal)

    Publisher: Hokkaido University Press

  66. In-situ Raman Observation on Aqueous Solution around Tetra-n-Butyl Ammonium Bromide Semi-Clathrate Hydrate

    Motoi Oshima, Shunsuke Hashimoto, Wataru Shimada, Atsushi Tani, Takeshi Sugahara, Kazunari Ohgaki

    Physics and Chemistry of Ice 2010　Vol. 2010　p. 141-146　2011/04　Research paper (scientific journal)

    Publisher: Hokkaido University Press

  67. Selective CO2 Trapping in Guest-Free Hydroquinone Clathrate Prepared by Gas-Phase Synthesis

    Yun-Je Lee, Kyu Won Han, Jin Seok Jang, Tae-In Jeon, Jeasung Park, Taro Kawamura, Yoshitaka Yamamoto, Takeshi Sugahara, Thomas Vogt, Jong-Won Lee, Yongjae Lee, Ji-Ho Yoon

    CHEMPHYSCHEM　Vol. 12　No. 6　p. 1056-1059　2011/04　Research paper (scientific journal)

  68. Competitive cage occupancy of hydrogen and argon in structure-II hydrates

    Shingo Amano, Takaaki Tsuda, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    FLUID PHASE EQUILIBRIA　Vol. 298　No. 1　p. 113-116　2010/11　Research paper (scientific journal)

  69. Isothermal Phase Equilibria for Binary Hydrate Systems of Carbon Dioxide plus Ethane and Carbon Dioxide plus Tetrafluoromethane

    Yuuki Matsui, Yoshihiro Ogura, Hiroshi Miyauchi, Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 55　No. 9　p. 3297-3301　2010/09　Research paper (scientific journal)

  70. Hydrogen storage in trimethylamine hydrate: Thermodynamic stability and hydrogen storage capacity of hydrogen plus trimethylamine mixed semi-clathrate hydrate

    Kyohei Ogata, Takaaki Tsuda, Shingo Amano, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 65　No. 5　p. 1616-1620　2010/03　Research paper (scientific journal)

  71. Thermodynamic Stabilities of Tetra-n-butyl Ammonium Chloride + H(2), N(2), CH(4), CO(2), or C(2)H(6) Semiclathrate Hydrate Systems

    Takashi Makino, Tomoyo Yamamoto, Kento Nagata, Hiromi Sakamoto, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 55　No. 2　p. 839-841　2010/02　Research paper (scientific journal)

  72. Thermodynamic Properties of Hydrogen + Tetra-n-Butyl Ammonium Bromide Semi-Clathrate Hydrate

    Shunsuke Hashimoto, Takaaki Tsuda, Kyohei Ogata, Takeshi Sugahara, Yoshiro Inoue, Kazunari Ohgaki

    Journal of Thermodynamics　Vol. 2010　p. 1-5　2010　Research paper (scientific journal)

    Publisher: Hindawi Publishing Corporation

  73. Structural Transformations of sVI tert-Butylamine Hydrates to sII Binary Hydrates with Methane

    Pinnelli S. R. Prasad, Takeshi Sugahara, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh

    JOURNAL OF PHYSICAL CHEMISTRY A　Vol. 113　No. 42　p. 11311-11315　2009/10　Research paper (scientific journal)

  74. Storage capacity of hydrogen in tetrahydrothiophene and furan clathrate hydrates

    Takaaki Tsuda, Kyohei Ogata, Shunsuke Hashimoto, Takeshi Sugahara, Masato Moritoki, Kazunari Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 64　No. 19　p. 4150-4154　2009/10　Research paper (scientific journal)

  75. Isothermal phase equilibria and structural phase transition in the carbon dioxide plus cyclopropane mixed-gas hydrate system

    Takashi Makino, Yoshihiro Ogura, Yuuki Matsui, Takeshi Sugahara, Kazunari Ohgaki

    FLUID PHASE EQUILIBRIA　Vol. 284　No. 1　p. 19-25　2009/10　Research paper (scientific journal)

  76. High-Pressure Phase Equilibrium and Raman Spectroscopic Studies on the Nitrous Oxide Hydrate System

    Takeshi Sugahara, Akira Kawazoe, Keisuke Sugahara, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 54　No. 8　p. 2301-2303　2009/08　Research paper (scientific journal)

  77. Tetra-n-butylammonium Borohydride Semiclathrate: A Hybrid Material for Hydrogen Storage

    Kyuchul Shin, Yongkwan Kim, Timothy A. Strobel, P. S. R. Prasad, Takeshi Sugahara, Huen Lee, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh

    JOURNAL OF PHYSICAL CHEMISTRY A　Vol. 113　No. 23　p. 6415-6418　2009/06　Research paper (scientific journal)

  78. Hydrogen Storage in Double Clathrates with tert-Butylamine

    Pinnelli S. R. Prasad, Takeshi Sugahara, Amadeu K. Sum, E. Dendy Sloan, Carolyn A. Koh

    JOURNAL OF PHYSICAL CHEMISTRY A　Vol. 113　No. 24　p. 6540-6543　2009/06　Research paper (scientific journal)

  79. Four-Phase Equilibrium Relations of Methane plus Methylcyclohexanol Stereoisomer plus Water Systems Containing Gas Hydrate

    Takashi Makino, Michiko Mori, Yasutaka Mutou, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 54　No. 3　p. 996-999　2009/03　Research paper (scientific journal)

  80. Thermodynamic and Raman spectroscopic studies on hydrogen plus tetra-n-butyl ammonium fluoride semi-clathrate hydrates

    Jun Sakamoto, Shunsuke Hashimoto, Takaaki Tsuda, Takeshi Sugahara, Yoshiro Inoue, Kazunari Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 63　No. 24　p. 5789-5794　2008/12　Research paper (scientific journal)

  81. Storage capacity of hydrogen in tetrahydrofuran hydrate

    Kyohei Ogata, Shunsuke Hashimoto, Takeshi Sugahara, Masato Moritoki, Hiroshi Sato, Kazunari Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 63　No. 23　p. 5714-5718　2008/12　Research paper (scientific journal)

  82. Isothermal Phase Equilibria for Methane + Ethane + Water Ternary System Containing Gas Hydrates

    Shunsuke Hashimoto, Arata Sasatani, Yuuki Matsui, Takeshi Sugahara, Kazunari Ohgaki

    The Open Thermodynamics Journal　Vol. 2　No. 1　p. 100-105　2008/10　Research paper (scientific journal)

    Publisher: Bentham Science Publishers Ltd.

  83. Thermodynamic and Raman Spectroscopic Studies of Ar Hydrate System

    Keisuke Sugahara, Ryuji Kaneko, Arata Sasatani, Takeshi Sugahara, Kazunari Ohgaki

    The Open Thermodynamics Journal　Vol. 2　No. 1　p. 95-99　2008/10　Research paper (scientific journal)

    Publisher: Bentham Science Publishers Ltd.

  84. Isothermal Phase Equilibria and Cage Occupancies for CH4 + CHF3 Mixed-Gas Hydrate System

    Takashi Makino, Yuuki Kunita, Takeshi Sugahara, Kazunari Ohgaki

    The Open Thermodynamics Journal　Vol. 2　No. 1　p. 17-21　2008/04/07　Research paper (scientific journal)

    Publisher: Bentham Science Publishers Ltd.

  85. Thermodynamic stability of hydrogen plus tetra-n-butyl ammonium bromide mixed gas hydrate in nonstoichiometric aqueous solutions

    Shunsuke Hashimoto, Takeshi Sugahara, Masato Moritoki, Hiroshi Sato, Kazunari Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 63　No. 4　p. 1092-1097　2008/02　Research paper (scientific journal)

  86. Cage Occupancy of Hydrogen in Carbon Dioxide, Ethane, Cyclopropane, and Propane Hydrates

    Kazunari Ohgaki, Takeshi Sugahara, Hiroki Mori, Jun Sakamoto, Shunsuke Hashimoto, Kyohei Ogata

    The Open Thermodynamics Journal　Vol. 2　No. 1　p. 1-6　2008/02　Research paper (scientific journal)

    Publisher: Bentham Science Publishers Ltd.

  87. Hydrogen transfer from guest molecule to radical in adjacent hydrate-cages

    Kazunari Ohgaki, Kentaro Nakatsuji, Kei Takeya, Atsushi Tani, Takeshi Sugahara

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS　Vol. 10　No. 1　p. 80-82　2008　Research paper (scientific journal)

  88. Electron spin resonance study on gamma-ray-induced radical species in ethylene hydrate

    Kei Takeya, Takeshi Sugahara, Kazunari Ohgaki, Atsushi Tani

    RADIATION MEASUREMENTS　Vol. 42　No. 8　p. 1301-1306　2007/09　Research paper (scientific journal)

  89. Fundamental Studies for a New H2 Separation Method Using Gas Hydrates

    Shunsuke Hashimoto, Shu Murayama, Takeshi Sugahara, Kazunari Ohgaki

    Physics and Chemistry of Ice　Vol. 2006　p. 209-216　2007/05　Research paper (scientific journal)

  90. Effects of Large Guest Species on Thermodynamic Properties of Structure-H Hydrates

    Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    Physics and Chemistry of Ice　Vol. 2006　p. 363-370　2007/05　Research paper (scientific journal)

  91. ESR Observation of Self-Preservation Effect of Methane Hydrate

    Kei Takeya, Kouhei Nango, Takeshi Sugahara, Atsushi Tani, Kazunari Ohgaki

    Physics and Chemistry of Ice　Vol. 2006　p. 585-591　2007/05　Research paper (scientific journal)

  92. Electron spin resonance study on gamma-ray-induced ethyl radical in ethane hydrate

    Kei Takeya, Kouhei Nango, Takeshi Sugahara, Kazunari Ohgaki, Atsushi Tano, Hironori Ito, Michio Okada, Toshio Kasa

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS　Vol. 46　No. 5A　p. 3066-3070　2007/05　Research paper (scientific journal)

  93. Thermodynamic stability of H2 + tetrahydrofuran mixed gas hydrate in nonstoichiometric aqueous solutions

    Shunsuke Hashimoto, Takeshi Sugahara, Hiroshi Sato, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 52　No. 2　p. 517-520　2007/03　Research paper (scientific journal)

  94. Raman spectroscopic studies on methane plus tetrafluoromethane mixed-gas hydrate system

    Yuuki Kunita, Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    FLUID PHASE EQUILIBRIA　Vol. 251　No. 2　p. 145-148　2007/02　Research paper (scientific journal)

  95. Thermodynamic and Raman spectroscopic studies on H2+tetrahydrofuran+water and H2+tetra-n-butyl ammonium bromide+water mixtures containing gas hydrates

    Shunsuke Hashimoto, Shu Murayama, Takeshi Sugahara, Hiroshi Sato, Kazunari Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 61　No. 24　p. 7884-7888　2006/12　Research paper (scientific journal)

  96. Phase equilibria for H2 + CO2 plus tetrahydrofuran plus water mixtures containing gas hydrates

    Shunsuke Hashimoto, Shu Murayama, Takeshi Sugahara, Kazunari Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 51　No. 5　p. 1884-1886　2006/09　Research paper (scientific journal)

  97. Thermodynamic and Raman spectroscopic studies on pressure-induced structural transition of SF6 hydrate

    K Sugahara, M Yoshida, T Sugahara, K Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 51　No. 1　p. 301-304　2006/01　Research paper (scientific journal)

  98. Stability boundaries of tetrahydrofuran plus water system

    T Makino, T Sugahara, K Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 50　No. 6　p. 2058-2060　2005/11　Research paper (scientific journal)

  99. Activation energy of methyl radical decay in methane hydrate

    K Takeya, K Nango, T Sugahara, K Ohgaki, A Tani

    JOURNAL OF PHYSICAL CHEMISTRY B　Vol. 109　No. 44　p. 21086-21088　2005/11　Research paper (scientific journal)

  100. Phase equilibria for H2+CO2+H2O system containing gas hydrates

    T Sugahara, S Murayama, S Hashimoto, K Ohgaki

    FLUID PHASE EQUILIBRIA　Vol. 233　No. 2　p. 190-193　2005/06　Research paper (scientific journal)

  101. Hydrate structural transition depending on the composition of methane plus cyclopropane mixed gas hydrate

    T Makino, M Tongu, T Sugahara, K Ohgaki

    FLUID PHASE EQUILIBRIA　Vol. 233　No. 2　p. 129-133　2005/06　Research paper (scientific journal)

  102. Large pressure depression of methane hydrate by adding 1,1- dimethylcyclohexane

    Tsutomu Hara, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    Chemical Engineering Science　Vol. 60　No. 11　p. 3117-3119　2005/06　Research paper (scientific journal)

    Publisher: Elsevier

  103. Icosahedron cage occupancy of structure-H hydrate helped by Xe-1,1-, cis-1,2-, trans-1,2-, and cis-1,4-dimethylcyclohexanes

    T Sugahara, T Hara, S Hashimoto, K Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 60　No. 6　p. 1783-1786　2005/03　Research paper (scientific journal)

  104. Thermodynamic and Raman spectroscopic studies of Xe and Kr hydrates

    K Sugahara, T Sugahara, K Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 50　No. 1　p. 274-277　2005/01　Research paper (scientific journal)

  105. Thermodynamic stability of structure-H hydrates of methylcyclopentane and cyclooctane helped by methane

    T Makino, T Nakamura, T Sugahara, K Ohgaki

    FLUID PHASE EQUILIBRIA　Vol. 218　No. 2　p. 235-238　2004/04　Research paper (scientific journal)

  106. High-pressure phase behavior and cage occupancy for the CF4 hydrate system

    K Sugahara, M Yoshida, T Sugahara, K Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 49　No. 2　p. 326-329　2004/03　Research paper (scientific journal)

  107. Gas hydration of trans-1,2-dimethylcyclohexane with cooperative assistance of methane and cis-1,2-dimethylcyclohexane

    T Nakamura, T Makino, T Sugahara, K Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 59　No. 1　p. 163-165　2004/01　Research paper (scientific journal)

  108. Stability boundary of the structure-H hydrate of cis-1,4-dimethyleyclohexane helped by methane

    T Nakamura, T Sugahara, K Ohgaki

    JOURNAL OF CHEMICAL AND ENGINEERING DATA　Vol. 49　No. 1　p. 99-100　2004/01　Research paper (scientific journal)

  109. Thermodynamic stability and structure of nitrogen hydrate crystal

    Keisuke Sugahara, Yuuki Tanaka, Takeshi Sugahara, Kazunari Ohgaki

    Journal of Supramolecular Chemistry　Vol. 2　No. 4-5　p. 365-368　2003/08　Research paper (scientific journal)

  110. Isothermal phase equilibria for the methane + ethylene mixed gas hydrate system

    Takeshi Sugahara, Takashi Makino, Kazunari Ohgaki

    Fluid Phase Equilibria　Vol. 206　No. 1-2　p. 117-126　2003/04/30　Research paper (scientific journal)

    Publisher: Elsevier

  111. Phase transition from structure-H to structure-I in the methylcyclohexane plus xenon hydrate system

    N Shimada, K Sugahara, T Sugahara, K Ohgaki

    FLUID PHASE EQUILIBRIA　Vol. 205　No. 1　p. 17-23　2003/03　Research paper (scientific journal)

  112. Thermodynamic Stability and Cage-Occupancy Limit for Structure-H Hydrates

    Takeshi SUGAHARA, Toshiyuki NAKAMURA, Noriyuki SHIMADA, Keisuke SUGAHARA, Takashi MAKINO, Kazunari OHGAKI

    The proceedings of the JSME annual meeting　Vol. 2003.3　p. 365-366　2003　Research paper (scientific journal)

    Publisher: Japan Society of Mechanical Engineers

  113. Stability boundaries of gas hydrates helped by methane-structure-H hydrates of methylcyclohexane and cis-1,2-dimethylcyclohexane

    T Nakamura, T Makino, T Sugahara, K Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 58　No. 2　p. 269-273　2003/01　Research paper (scientific journal)

  114. Pressure dependence of small-cage occupancy in the cyclopropane hydrate system

    Masaru Suzuki, Yuuki Tanaka, Takeshi Sugahara, Kazunari Ohgaki

    Chemical Engineering Science　Vol. 56　No. 6　p. 2063-2067　2001/04/10　Research paper (scientific journal)

  115. Stability boundaries and small hydrate-cage occupancy of ethylene hydrate system

    T Sugahara, K Morita, K Ohgaki

    CHEMICAL ENGINEERING SCIENCE　Vol. 55　No. 24　p. 6015-6020　2000/12　Research paper (scientific journal)

  116. Border gas hydrate system having quadruple point of hydrate plus two liquids plus gas phases

    T Sugahara, K Ohgaki

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN　Vol. 33　No. 1　p. 174-176　2000/02　Research paper (scientific journal)

  117. Phase behavior of xenon hydrate system

    Kazunari Ohgaki, Takeshi Sugahara, Masaru Suzuki, Hitoshi Jindai

    Fluid Phase Equilibria　Vol. 175　No. 1-2　p. 1-6　2000　Research paper (scientific journal)

  118. Hysteresis in dissociation and reformation of methane hydrate crystal

    K Ohgaki, T Sugahara, S Nakano

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN　Vol. 32　No. 2　p. 235-236　1999/04　Research paper (scientific journal)

  119. Non-equilibrium MD studies on gas permeation through carbon membranes with belt-like heterogeneous surfaces

    S Furukawa, T Sugahara, T Nitta

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN　Vol. 32　No. 2　p. 223-228　1999/04　Research paper (scientific journal)

Misc. 42

  1. 蓄冷材としてのクラスレートハイドレートの可能性

    町田博宣, 菅原 武

    えねるみくす　Vol. 103　No. 2　p. 173-178　2024/03　Article, review, commentary, editorial, etc. (scientific journal)

  2. CO2を含むクラスレートハイドレートの相平衡関係

    菅原 武

    えねるみくす　Vol. 103　No. 2　p. 152-158　2024/03　Article, review, commentary, editorial, etc. (scientific journal)

  3. 固体結晶中にあるイオンまわりの水分子の挙動−水分子を用いた材料開発の新たな設計指針を提案−

    嶋田 仁, 菅原 武, 平井隆之

    化学　Vol. 79　No. 1　p. 33-36　2024/01　Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)

  4. 蓄冷用クラスレートハイドレート形成における過冷却抑制

    町田博宣, 菅原武, 平沢泉

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　Vol. 53rd　2022

  5. 2-1-3 Crystallization of cold storage material by dynamic stimulation

    町田博宣, 菅原武, 平沢泉

    日本エネルギー学会大会講演要旨集(Web)　Vol. 31　2022

  6. Hysteresis of Crystallization Derived from Residual Solution Structures after Semiclathrate Hydrate Decomposition

    Takeshi Sugahara, Hironobu Machida

    Japanese J. Multiphase Flow　Vol. 35　No. 4　p. 516-524　2021/12　Article, review, commentary, editorial, etc. (scientific journal)

  7. Equilibrium Phase Relations of Gas Hydrates and Cage Occupancy of Guest Species

    SUGAHARA Takeshi

    Journal of the Japan Institute of Energy "Enermix"　Vol. 98　No. 1　p. 47-51　2019/01　Article, review, commentary, editorial, etc. (scientific journal)

  8. Cage Occupancy of Guest Molecules and Thermodynamic Stability of Gas Hydrates

    Takeshi Sugahara

    Refrigeration　Vol. 93　p. 13-17　2018/09　Article, review, commentary, editorial, etc. (scientific journal)

  9. Gas Separation Using Gas Hydrates

    Takeshi Sugahara

    Bunri GIjyutsu　Vol. 47　No. 3　p. 29-34　2017/06　Article, review, commentary, editorial, etc. (scientific journal)

  10. HOCO-CO2間で起こる分子間水素原子移動反応と惑星科学への応用

    大島基, 谷篤史, 北野勝久, 菅原武, 大垣一成

    ESR応用計測　Vol. 30　2014

  11. O12-06 分子間水素原子移動によるHOCOラジカルの分解(口頭発表セッション12(分析・実験),口頭発表)

    大島 基, 谷 篤史, 菅原 武, 大垣 一成, 北野 勝久

    日本惑星科学会秋期講演会予稿集　Vol. 2013　p. "O12-06"　2013/11/20

    Publisher: 日本惑星科学会

  12. Prospects for the Development of Phase Equilibrium Estimation of Clathrate Hydrates Based on van der Waals & Platteeuw Model - Report from the Symposium at the 53rd High Pressure Conference of Japan

    Tsutomu Uchida, Takeshi Sugahara, Kazunari Ohgaki, Hideki Tanaka, Satoshi Takeya, Atsushi Tani

    The Review of High Pressure Science and Technology　Vol. 23　No. 2　p. 141-147　2013/06　Article, review, commentary, editorial, etc. (scientific journal)

    Publisher: The Japan Society of High Pressure Science and Technology

  13. Characteristics of gas hydrates through observation of radical species

    Atsushi Tani, Takeshi Sugahara, Motoi Oshima, Kei Takeya, Kazunari Ohgaki

    Low Temperature Science　Vol. 71　p. 187-192　2013/04　Article, review, commentary, editorial, etc. (scientific journal)

  14. クラスレートハイドレートを反応場とした水素原子移動を伴うHOCO/DOCOラジカルの反応

    大島基, 谷篤史, 菅原武, 大垣一成, 北野勝久

    電子スピンサイエンス学会年会講演要旨集　Vol. 52nd　2013

  15. 微量CH4を含むCO2ハイドレート内部に誘起されるラジカル種の挙動

    大島基, 谷篤史, 北野勝久, 菅原武, 大垣一成

    高圧討論会講演要旨集　Vol. 53rd　2012

  16. 温和な条件における分子状水素貯蔵媒体の探求

    菅原 武

    大阪大学低温センターだより　Vol. 157　p. 1-5　2012/01

    Publisher: 大阪大学低温センター

  17. Science and Engineering on Gas Hydrates

    Takeshi Sugahara, Kazunari Ohgaki

    Chemical Education　2012/01　Article, review, commentary, editorial, etc. (scientific journal)

  18. ガンマ線を照射したCO2ハイドレート内部におけるラジカルの熱安定性と反応系

    大島基, 谷篤史, 北野勝久, 菅原武, 大垣一成

    ESR応用計測　Vol. 28　2011

  19. 放射線照射を受けたCO2ハイドレートにおいて温度により変化するラジカルの反応

    大島基, 谷篤史, 北野勝久, 菅原武, 大垣一成

    ESR応用計測　Vol. 27　2011

  20. Competitive Cage-occupancy of Hydrogen in Structure-II Hydrates

    AMANO Shingo, TSUDA Takaaki, HASHIMOTO Shunsuke, SUGAHARA Takeshi, OHGAKI Kazunari

    Vol. 51　p. 166-166　2010/10/11

  21. Storage capacity of hydrogen in gas hydrates

    Takaaki Tsuda, Kyohei Ogata, Shunsuke Hashimoto, Takeshi Sugahara, Hiroshi Sato, Kazunari Ohgaki

    Journal of Physics: Conference Series　Vol. 215　p. 012061-012061　2010/03/01　Article, review, commentary, editorial, etc. (international conference proceedings)

    Publisher: {IOP} Publishing

  22. Relaxation of crystal structure in TBAB semi-clathrate hydrates dissociation process

    Motoi Oshima, Shunsuke Hashimoto, Atsushi Tani, Takeshi Sugahara, Kazunari Ohgaki, Wataru Shimada

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research　Vol. 2010　2010

  23. Hydrogen Storage in tri-Methylamine Clathrates

    Pinnelli S. R. Prasad, Takeshi Sugahara, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh

    XXII INTERNATIONAL CONFERENCE ON RAMAN SPECTROSCOPY　Vol. 1267　p. 1148-+　2010

  24. Hydrogen storage in clathrate materials

    Prasad R. Prasad, T. Sugahara, Y. Kim, Amadeu K. Sum, E. Dendy Sloan, Carolyn A. Koh

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY　Vol. 238　2009/08　Research paper, summary (international conference)

  25. Storage Capacity of Hydrogen in Gas Hydrates : Current State and Assignment

    HASHIMOTO SHUNSUKE, SUGAHARA TAKESHI, SATO HIROSHI, OHGAKI KAZUNARI

    Vol. 51　No. 4　p. 298-303　2009/06/10

    Publisher: 触媒学会

  26. ESR Spectral Analysis of Free Radicals in Irradiated Gas Hydrates below 77 K

    Atsushi Tani, Kei Takeya, Takeshi Sugahara, Kazunari Ohgaki

    Proceedings of the 6th International Conference on Gas Hydrates　2008/07　Research paper, summary (national, other academic conference)

  27. 二酸化炭素とメタンの混合ハイドレートに生成するラジカル種とその反応

    谷篤史, 木谷晋輔, 竹家啓, 菅原武, 大垣一成, 大塚高弘, 中嶋悟

    ESR応用計測　Vol. 24　2008

  28. Thermodynamic Stability of Mixed Gas Hydrates Containing Hydrogen

    Shunsuke Hashimoto, Takeshi Sugahara, Masato Moritoki, Hiroshi Sato, Kazunari Ohgaki

    JOINT 21ST AIRAPT AND 45TH EHPRG INTERNATIONAL CONFERENCE ON HIGH PRESSURE SCIENCE AND TECHNOLOGY　Vol. 121　p. 22012-1-5　2008　Article, review, commentary, editorial, etc. (international conference proceedings)

  29. Capability of Gas Hydrates as Hydrogen Storage Medium

    Kazunari Ohgaki, Takeshi Sugahara

    Journal of The Hydrogen Energy Systems Society of Japan　Vol. 32　No. 4　p. 20-26　2007/12　Article, review, commentary, editorial, etc. (scientific journal)

    Publisher: 水素エネルギー協会

  30. プロパンハイドレートにおけるプロピルラジカルの変化

    谷篤史, 仲辻健太郎, 竹家啓, 菅原武, 大垣一成

    日本化学会講演予稿集　Vol. 87th　No. 2　2007

  31. エチレンハイドレートに誘起されるラジカル種の熱安定性

    竹家啓, 仲辻健太郎, 菅原武, 谷篤史, 大垣一成

    ESR応用計測　Vol. 23　2007

  32. C142 Thermodynamic and Raman Spectroscopic Studies on Mixed Gas Hydrates Containing Hydrogen

    HASHIMOTO Shunsuke, MURAYAMA Shu, MORI Hiroki, SAKAMOTO Jun, SUGAHARA Takeshi, SATO Hiroshi, OHGAKI Kazunari

    Procee[d]ings of Thermal Engineering Conference　Vol. 2006　p. 97-98　2006/11/23

    Publisher: The Japan Society of Mechanical Engineers

  33. Free radicals in methane hydrate

    谷篤史, 石川謙二, 竹家啓, 仲辻健太郎, 菅原武, 大垣一成

    日本機械学会熱工学コンファレンス講演論文集　Vol. 2006　2006/11/23　Research paper, summary (national, other academic conference)

  34. Thermodynamic Stability of Gas Hydrates and Cage Occupancy of Guest Species

    Takeshi Sugahara

    The Review of High Pressure Science and Thechnology　Vol. 16　No. 2　p. 155-166　2006/06　Article, review, commentary, editorial, etc. (scientific journal)

    Publisher: The Japan Society of High Pressure Science and Technology

  35. Radicals Induced by gamma-ray Irradiation in Ethane and Ethylene Hydrates

    Kei Takeya, Kouhei Nango, Takeshi Sugahara, Kazunari Ohgaki, Atsushi Tani

    Proceedings of the 5th international conference on gas hydrates　Vol. 1　2005/06/15　Research paper, summary (national, other academic conference)

  36. γ線照射エタンハイドレート内に誘起したラジカルに関する研究

    南郷興平, 竹家啓, 菅原武, 大垣一成, 谷篤史

    高圧討論会講演要旨集　Vol. 46th　2005

  37. エタンハイドレート内部に誘起されたエチルラジカルに関する研究

    南郷興平, 竹家啓, 菅原武, 谷篤史, 大垣一成

    ESR応用計測　Vol. 22　2005

  38. プロパンハイドレートの照射効果について

    仲辻健太郎, 南郷興平, 竹家啓, 菅原武, 谷篤史, 大垣一成

    ESR応用計測　Vol. 22　2005

  39. メタンハイドレート中に誘起されたメチルラジカルの活性化エネルギー

    竹家啓, 南郷興平, 菅原武, 谷篤史, 大垣一成

    ESR応用計測　Vol. 22　2005

  40. 混合ハイドレートの興味ある現象

    菅原 武, 牧野貴至

    未来を拓く高圧力科学技術セミナーシリーズ　Vol. 26　p. 1-8　2003/03　Lecture material (seminar, tutorial, course, lecture, etc.)

  41. Phase Behavior and Structural Phase Transition of Methane Hydrates

    Kazunari Ohgaki, Takeshi Sugahara

    Bulletin of the Society of Sea Water Science,Japan　Vol. 56　No. 4　p. 292-296　2002/08　Article, review, commentary, editorial, etc. (scientific journal)

    Publisher: 日本海水学会

  42. Phase Behavior for Pure and Mixed Gas Hydrate Systems

    Takeshi Sugahara, Keisuke Sugahara, Kazunari Ohgaki

    The Review of High Pressure Science and Technology　Vol. 12　No. 1　p. 34-39　2002/03　Article, review, commentary, editorial, etc. (scientific journal)

    Publisher: The Japan Society of High Pressure Science and Technology

Publications 4

  1. 日本のガスハイドレート研究のあゆみ

    (一社)日本エネルギー学会 天然ガス部会 資源分科会 GH 研究会編集委員会編

    日本工業出版　2020/09/30

  2. 海水の疑問50

    日本海水学会編, 上ノ山周編著

    成山堂書店　2017/09　General book, introductory book for general audience

    ISBN: 9784425830916

  3. 水素利用技術集成Vol.4 高効率貯蔵技術、水素社会構築を目指して

    NTS編集部

    エヌ・ティー・エス　2014/04　Scholarly book

    ISBN: 9784864690829

  4. おもしろい海・気になる海Q&A

    日本海水学会

    工業調査会　2004/06　General book, introductory book for general audience

Presentations 125

  1. CO2/Hydrocarbon Selectivity of Ether-functionalized Phosphonium-based Ionic Liquids and Design of the Gas Separation Process

    Yuki Suzuki, Koki Isobe, Daisuke Kodama, Takeshi Sugahara

    17th International Conference on Properties and Phase Equilibria for Product and Process Design (PPEPPD'25)　2025/05/12

  2. Electrochemical Properties of Tetra-n-butylammonium Carboxylate Semiclathrate Hydrates

    Takeshi Sugahara, Riko Tsugaya, Jin Shimada, Takayuki Hirai

    17th International Conference on Properties and Phase Equilibria for Product and Process Design (PPEPPD'25)　2025/05/14

  3. Four-Phase Equilibrium Relation of Clathrate Hydrate + Aqueous + Liquefied Guest + Vapor Phases in the Carbon Dioxide, Sulfur Hexafluoride, and Water Ternary System

    Takeshi Sugahara, Tasuku Ishikawa, Takayuki Hirai, Norimasa Yoshimoto

    17th International Conference on Properties and Phase Equilibria for Product and Process Design (PPEPPD'25)　2025/05/12

  4. Hystersis in semiclathrate hydrate reformation

    Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara, Takayuki Hirai

    The 13rd Symposium on Latent Heat Engineering　2024/11/28

  5. Introduction of Cyclic Structures into Phosphonium Salts As Potential Guest Substances for Ionic Clathrate Hydrates

    Keigo Kawabata, Sakura Azuma, Jin Shimada, Yusuke Tsuchida, Katsuhiko Tsunashima, Takeshi Sugahara, Atsushi Tani

    Pacific Rim Meeting on Electrochemical and Solid State Science (PRiME2024)　2024/10/07

  6. カルボキシラートアニオンを含むセミクラスレートハイドレートの電気伝導度

    津ヶ谷璃子, 嶋田 仁, 菅原 武, 平井隆之

    化学工学会第55回秋季大会　2024/09/11

  7. 海底地盤の改良を目的とした CO2＋SF6混合ガスハイドレートの相平衡測定

    石川 佑, 宮武麟太朗, 菅原 武, 平井隆之, 吉本憲正

    化学工学会第55回秋季大会　2024/09/11

  8. Density, Viscosity, Heat Capacity, Gas Solubility, and CO2/Hydrocarbon Selectivity of Ether-Functionalized Phosphonium-Based Ionic Liquids

    Yuki Suzuki, Koki Isobe, Daisuke Kodama, Takeshi Sugahara

    The 28th Thermodynamics Conference (Thermodynamics2024)　2024/09/05

  9. Phase Equilibrium Behavior of Semiclathrate Hydrates Based on Quaternary Phosphonium Bromides Containing Alicyclic Structures

    Keigo Kawabata, Sakura Azuma, Jin Shimada, Yusuke Tsuchida, Katsuhiko Tsunashima, Takeshi Sugahara, Atsushi Tani

    10th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS'24)　2024/08/28

  10. Phase Equilibria of CO2 + SF6 Mixed Gas Hydrate Aimed at Improving the Mechanical Properties by Gas Hydrate-Bearing Sediment

    Tasuku Ishikawa, Rintaro Miyatake, Takeshi Sugahara, Takayuki Hirai, Norimasa Yoshimoto

    10th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS'24)　2024/08/28

  11. Electrical Conductivity in the Single-Crystalline TBA-Carboxylate Semiclathrate Hydrates

    Riko Tsugaya, Takeshi Sugahara, Jin Shimada, Takayuki Hirai

    10th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS'24)　2024/08/28

  12. Hysteresis in the Reformation of Various Semiclathrate Hydrates

    Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara, Takayuki Hirai

    33rd Annual Meeting of the Japan Institute of Energy　2024/08/08

  13. エネルギー貯蔵媒体としてのクラスレートハイドレート

    菅原 武

    第61回日本伝熱シンポジウム　2024/05/31

  14. 尿素クラスレートを用いたプロパン/プロピレンの分離

    小畠陵輔, 菅原 武, 平井隆之

    化学工学会第89年会　2024/03/20

  15. Effect of anions on the memory effect of semiclathrate hydrate formation

    Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara, Takayuki Hirai

    SCEJ 54th Autumn Meeting　2023/09/11

  16. Phase equilibria of methane + carbon dioxide mixed gas hydrate system for carbon dioxide capture and storage

    Rintaro Miyatake, Takeshi Sugahara, Motoi Oshima, YUsuke Zin, Takayuki Hirai

    SCEJ 54th AUtumn Meeting　2023/09/13

  17. Electrical conductivity in semiclathrate hydrates with different guest ions

    Jin Shimada, Takeshi Sugahara, Atsushi Tani, Katsuhiko Tsunashima, Takayuki HIrai

    SCEJ 54th Autumn Meeing　2023/09/13

  18. Supercooling Suppression in the Tetrahydrofuran Clathrate Hydrate Formation

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    15th International Conference on the Physics and Chemistry of Ice (PCI2023)　2023/09/07

  19. Effect of Functional Group in Dicarboxylate Anions on the Latent Heat Storage Properties of Semiclathrate Hydrates

    Kazuhiro Minamikawa, Jin Shimada, Takeshi Sugahara, Katsuhiko Tsunashima, Takayuki Hirai

    15th International Conference on the Physics and Chemistry of Ice (PCI2023)　2023/09/07

  20. Proton Conduction Mechanism in TBAB Semiclathrate Hydrate Obtained by NMR and QENS Measurements

    Jin Shimada, Takeshi Sugahara, Atsushi Tani, Takahiro Ueda, Takeshi Yamada, Takuo Okuchi, Katsuhiko Tsunashima, Takayuki Hirai

    15th International Conference on the Physics and Chemistry of Ice (PCI2023)　2023/09/05

  21. Effect of carboxylate ions on the memory effect of semiclathrate hydrate formation

    Kazuhiro MINAMIKAWA, Jin SHIMADA, Takeshi SUGAHARA, Takayuki HIRAI

    The 32nd Annual Conference of the Japan Society of Energy　2023/08/09

  22. Dependence of guest ions on proton conductivity in semiclathrate hydrates

    Jin SHIMADA, Takeshi SUGAHARA, Takayuki HIRAI, Atsushi TANI, Takahiro UEDA, Katsuhiko TSUNASHIMA

    The 32nd Annual Conference of the Japan Society of Energy　2023/08/09

  23. Proton conduction in tetra-n-butylammonium bromide semiclathrate hydrate

    Jin Shimada, Takeshi Sugahara, Atsushi Tani, Takahiro Ueda, Katsuhiko Tsunashima, Takayuki Hirai

    10th International Conference on Gas Hydrates (ICGH10)　2023/07/13

  24. Supercooling suppression of semiclathrate hydrates by promoting cluster formation

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    10th International Conference on Gas Hydrates (ICGH10)　2023/07/12

  25. Clathrate hydrates for thermal storage – design of ionic guest species and supercooling suppression –

    Takeshi Sugahara, Hironobu Machida, Jin Shimada, Kazuhiro Minamikawa, Takayuki Hirai

    10th International Conference on Gas Hydrates (ICGH10)　2023/07/11

  26. Design of Semiclathrate Hydrates for Thermal Storage

    Takeshi Sugahara, Hironobu Machida, Jin Shimada, Kazuhiro Minamikawa, Takayuki Hirai

    16th International Conference on Properties and Phase Equilibria for Products and Process Design (PPEPPD2023)　2023/05/24

  27. Supercooling suppression of semiclathrate hydrate for cold storage

    Hironobu MACHIDA, Takeshi SUGAHARA

    11st Symposium on Latent Heat Engineering　2022/10/31

  28. The effect of shape and hydroxyl group in dicarboxylate on the latent heat storage properties of semiclathrate hydrates

    Kazuhiro Minamiakwa, Jin Shimada, Takeshi Sugahara, Katsuhiko Tsunashima, Takayuki Hirai

    11st Symposium on Latent Heat Engineering　2022/10/31

  29. Effects of hydrocarbon chains in the quaternary phosphonium cations on the thermophysical properties of semiclathrate hydrates

    Jin SHIMADA, Sakura AZUMA, Takeshi SUGAHARA, Katsuhiko TSUNASHIMA, Atsushi TANI, Takayuki HIRAI

    The 43nd Japan Symposium on Thermophysical Properties　2022/10/27

  30. Phosphonium Salts As Potential Guest Substances for Ionic Semiclathrate Hydrates

    Sakura Azuma, Katsuhiko Tsunashima, Jin Shimada, Takeshi Sugahara, Atsushi Tani

    242nd ECS (Electrochemical Society) Meeting　2022/10/12

  31. 蓄冷用クラスレートハイドレート形成における過冷却抑制

    町田博宣, 菅原 武, 平沢 泉

    化学工学会第53回秋季大会　2022/09/14

  32. 第四級ホスホニウムカチオンの炭化水素鎖がセミクラスレートハイドレートの熱力学特性に及ぼす影響

    嶋田 仁, 東 さくら, 綱島克彦, 菅原 武谷, 篤史, 平井隆之

    化学工学会第53回秋季大会　2022/09/14

  33. 不飽和型ホスホニウムカチオンをゲストとする準包接水和物の相平衡挙動と結晶構造の解析

    東 さくら, 綱島 克彦, 嶋田 仁, 菅原 武, 谷 篤史

    2022年電気化学秋季大会　2022/09/09

  34. Separation of Propane and Propylene Using Urea Clathrates

    Ryosuke KOBATAKE, Takahiro YAMAZAKI, Takeshi SUGAHARA, Takayuki HIRAI

    31th Annual Meeting of the Japan Institute of Energy　2022/08/05

  35. Latent heat storage properties of semiclathrate hydrates including quaternary phosphonium cations with carbon-carbon double bond

    Jin SHIMADA, Takeshi SUGAHARA, Takayuki HIRAI, Sakura AZUMA, Katsuhiko TSUNASHIMA, Atsushi TANI

    31th Annual Meeting of the Japan Institute of Energy　2022/08/05

  36. Crystallization of cold storage material by dynamic stimulation

    Hironobu MACHIDA, Takeshi SUGAHARA, Izumi HIRASAWA

    31th Annual Meeting of the Japan Institute of Energy　2022/08/04

  37. ホスホニウム型準包接水和物の相平衡挙動と蓄熱特性

    東 さくら, 綱島 克彦, 嶋田 仁, 菅原 武, 谷 篤史

    第11回 JACI/GSCシンポジウム　2022/06/16

  38. Supercooling suppression of semiclathrate hydrate

    Hironobu MACHIDA, Takeshi SUGAHARA

    10th Symposium on Latent Heat Engineering　2021/11/29

  39. Thermodynamic properties of tetra-n-butylphosphonium dicarboxylate semiclathrate hydrates

    Jin Shimada, Moe Yamada, Takeshi Sugahara, Katsuhiko Tsunashima, Atsushi Tani, Takayuki Hirai

    SCEJ 52nd Autumn Meeting　2021/09/22

  40. Thermodynamic properties of tetra-n-butylphosphonium dicarboxylate semiclathrate hydrates

    Jin Shimada, Moe Yamada, Takeshi Sugahara, Atsushi Tani, Katsuhiko Tsunashima, Takayuki Hirai

    9th international symposium on “Molecular Thermodynamics and Molecular Simulation (MTMS ’21)”　2021/09/09

  41. Thermodynamic Stabilities of Clathrate Hydrates Including Tetrahydrofuran and Quaternary Onium Salts

    Takeshi Sugahara, Hironobu Machida

    9th international symposium on “Molecular Thermodynamics and Molecular Simulation (MTMS ’21)”　2021/09/09

  42. Isotope effect on impedance properties of single-crystalline TBAB semiclathrate hydrate

    Jin SHIMADA, Takeshi SUGAHARA, Takayuki HIRAI, Yuta TAKAOKA, Katsuhiko TSUNASHIMA, Atsushi TANI, Hirohisa YAMADA

    The 30th Annual Meeting of the Japan Institute of Energy　2021/08/05

  43. Thermodynamic Stabilities of Clathrate Hydrates Including Tetrahydrofuran and Quaternary Onium Salts

    Takeshi Sugahara, Hironobu Machida

    The 30th Annual Meeting of the Japan Institute of Energy　2021/08/05

  44. In-situ Monitoring of Tetra-n-butylammonium Bromide Semiclathrate Hydrate Formation Process by AC Impedance Method

    J. Shimada, Y. Takaoka, K. Tsunashima, H. Yamada, T. Sugahara, A. Tani

    30th Annual Meeting of MRS-J　2020/12/11

  45. 四級オニウム塩をゲストとする準包接水和物の調製と導電特性

    髙岡祐太, 嶋田仁, 綱島克彦, 菅原武, 谷篤史, 山田裕久

    電気化学会第87回大会　2020/03/19

  46. テトラブチルアンモニウムブロミドからなる準包接水和物の交流インピーダンス特性に及ぼす結晶状態の影響

    髙岡祐太, 嶋田仁, 綱島克彦, 菅原武, 谷篤史, 山田裕久

    第3回関西電気化学研究会　2019/12/21

  47. Effects of phosphonium cation on equilibrium temperature and latent heat of semiclathrate hydrates

    Jin SHIMADA, Masami SHIMADA, Takeshi SUGAHARA, Katsuhiko TSUNASHIMA, Atsushi TANI

    2019/12/03

  48. Various behavior derived from solution structures in TBAB aqueous solution

    Takeshi SUGAHARA, Hironobu MACHIDA, Hiroyasu MASUNAGA, Izumi HIRASAWA

    JST-Mirai-Project International Workshop on Latent Heat Engineering　2019/12/03

  49. Phase Equilibrium Behavior of Bromide Semiclathrate Hydrates with Different Alkyl Chains of Phosphonium Cations

    Jin Shimada, Masami Shimada, Takeshi Sugahara, Katsuhiko Tsunashima, Atsushi Tani

    29th Annual Meeting of MRS-J　2019/11/27

  50. トリブチルアルキルホスホニウムカチオンを内包したセミクラスレートハイドレートの物理化学特性

    嶋田 仁, 三輪泰大, 嶋田大海, 菅原 武, 綱島克彦, 佐藤春実, 谷 篤史

    第10回イオン液体討論会　2019/11/22

  51. 最近のガスハイドレート研究

    菅原 武

    海上技術安全研究所セミナー　2019/10/04

  52. Observation of memory effect in TBAB supercooled aqueous solution

    Hironobu MACHIDA, Takeshi SUGAHARA, Izumi HIRASAWA

    18th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019)　2019/09/24

  53. Memory Effect and Hydrate Reformation from TBAB Aqueous Solution

    Takeshi Sugahara, Hironobu Machida, Hiyoyasu Masunaga, Izumi Hirasawa

    15th International Conference on Properties and Phase Equilibria for Product and Process Design (PPEPPD2019)　2019/05/14

  54. デザイナー潜熱蓄熱材としてのセミクラスレートハイドレート−溶液構造とメモリ効果−

    菅原 武

    第８回潜熱工学シンポジウム　2018/12/03

  55. Ionic conductivities in ionic clathrate hydrates based on quaternary ammonium and phosphonium salts

    Jin Shimada, Takeshi Sugahara, Hirohisa Yamada, Katsuhiko Tsunashima

    6th Asian-Pacific Conference on Ionic Liquids & Green Processes (APCIL-6)　2018/11/01

  56. Thermodynamic Stabilities of Tetra-n-butylphosphonium + Gas Semiclathrate Hydrate Systems

    Masami Shimada, Takeshi Sugahara, Katsuhiko Tsunashima

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS'18)　2018/09/06

  57. Phase Equilibrium Relations of Semiclathrate Hydrates Based on Tetra-n-butylphosphonium Formate, Acetate, Propionate and Lactate

    Jin Shimada, Masami Shimada, Takeshi Sugahara, Katsuhiko Tsunashima

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS'18)　2018/09/06

  58. Memory Effect and Hydrate Reformation from TBAB Aqueous Solution - SEM Observation

    Hironobu Machida, Hiroyasu Masunaga, Takeshi Sugahara, Izumi Hirasawa

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS'18)　2018/09/06

  59. Phase Equilibrium Measurement of Semiclathrate Hydrates by Differential Scanning Calorimetry

    Takeshi Sugahara, Hironobu Machida

    8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS'18)　2018/09/06

  60. Structure Observation of Sodium Acetate Supercooled Aqueous Solution

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    4th Asian Crystallization Technology Symposium (ACTS-2018)　2018/06/21

  61. Supercooling Suppression and Memory Effect in Semiclathrate Hydrate Crystallization

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    4th Asian Crystallization Technology Symposium (ACTS-2018)　2018/06/21

  62. SEM Observation of Semiclathrate Hydrate and Supercooled Aqueous Solution

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    4th Asian Crystallization Technology Symposium (ACTS-2018)　2018/06/21

  63. SEM Observation on Hydrate Formation from TBAB Aqueous Solution and Memory Effect

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    14th International Conference on the Physics and Chemistry of Ice (PCI-2018)　2018/01/09

  64. SEM observation of solution structures in tetra-n-butyl ammonium bromide supercooled aqueous solution

    Takeshi Sugahara, Hironobu Machida, Izumi Hirasawa

    CSMH-9　2017/10/26

  65. 臭化テトラブチルアンモニウム過冷却水溶液中の構造観察

    町田博宣, 菅原 武, 平沢 泉

    化学工学会第49回秋季大会　2017/09/22

  66. Structure Observation of Sodium Acetate Supercooled Aqueous Solution

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    The 5th international symposium & Exhibition on “Aqua Science and Water Resources (ISASWR’17)”　2017/08/09

  67. TBABセミクラスレートハイドレートの生成・分解挙動

    菅原 武, 町田博宣

    日本エネルギー学会第26回大会　2017/08/02

  68. 種々のカルボキシレート型ホスホニウム塩から成るイオン性クラスレートハイドレートの生成挙動

    嶋田 仁, 綱島克彦, 菅原 武, 谷 篤史

    6th JACI/GSCシンポジウム　2017/07/04

  69. Observation of Crystal Structure of TBAB Semiclathrate Hydrate by SEM

    Hironobu Machida, Takeshi Sugahara, Izumi Hirasawa

    9th International Conference on Gas Hydrates (ICGH9)　2017/06/27

  70. Microstructure observation of methane hydrate using the freeze-fracture replica method

    Ayumi Fujimoto, SUGAHARA Takeshi

    The 73rd Annual Meeting of The Japanese Society of Microscopy　2017/06/01

  71. Gas Absorption into Structure-II Clathrate Hydrates

    Takeshi Sugahara, Thierry P. Rodriguez Garcia

    25th Annual Meeting of the Japan Institute of Energy　2016/08/10

  72. Thermodynamic Stability of Xenon+Benzene Mixed Hydrates

    Takeshi Sugahara

    14th International Conference on Properties and Phase Equilibria for Product and Process Design (PPEPPD)　2016/05/24

  73. ガスハイドレートを利用した分子状水素の貯蔵

    菅原 武

    第14回ガスハイドレート産業創出イノベーション講演会　2015/11/10

  74. ラマン分光分析でみたガスハイドレート−基礎物性測定と応用研究への展開−

    菅原 武

    日本大学工学部 生命応用化学科セミナー　2015/11/04

  75. 「その場」顕微ラマン分光測定でみたガスハイドレートの特性

    菅原 武

    第46回GH研究会　2015/08/05

  76. Cage occupancy of hydrogen molecules in the structure I, II, H, and VI hydrates

    Takeshi Sugahara, Yuuya Fujisawa, Takashi Fujimoto, Kazuma KItamura

    19th Symposium of Thermophysical Properties　2015/06/26

  77. Mechanism of Synergistic Methyl Radical Formation in CH4+CO2 Mixed Gas Hydrates Systems

    Danilo Y, Yatabe Franco, Kazuma Kitamura, Motoi Oshima, Takeshi Sugahara, Atsushi Tani

    19th Symposium of Thermophysical Properties　2015/06/24

  78. Necessity of New Estimation Model for Phase Equilibrium Relations

    Takeshi Sugahara

    Seminar of Chemical Engineering Department, Rice University　2015/06/19

  79. Investigating the Thermodynamic Properties of Gas Hydrates Including Hydrogen and Methane

    Yuuki Matsumoto, R. Gary Grim, Naveed M. Khan, Takeshi Sugahara, Kazunari Ohgaki, E. Dendy Sloan, Carolyn A. Koh, Amadeu K. Sum

    8th International Conference on Gas Hydrates (ICGH8)　2014/07

  80. Thermodynamic Stabilities of Simple and Mixed Hydrates Containing Tertiary-Butylamine

    Takeshi Sugahara, Tomohiro Tanabe, Kazuma Kitamura, Takahiro Yamazaki, Kazunari Ohgaki

    8th International Conference on Gas Hydrates (ICGH8)　2014/07

  81. High-Pressure Phase Equilibria of Structure-H Hydrate Systems Enclathrating Methane and Large Guest Species

    Yuuki Matsumoto, Yoshito Katsuta, Tatsuya Bando, Fumitaka Kamo, Sumihiro Suzuki, Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    13th International Conference on the Physics and Chemistry of Ice (PCI2014)　2014/03

  82. Blue-Colored Clathrate Hydrate

    Atsushi Tani, Yusuke Urabe, Kenji Takato, Satoshi Koyama, Takeshi Sugahara, Kazunari Ohgaki

    13th International Conference on the Physics and Chemistry of Ice (PCI2014)　2014/03

  83. Formation and Stabilization of Radicals in Methane and CO2 Mixed Hydrates

    Motoi Oshima, Kazuma Kitamura, Atsushi Tani, Takeshi Sugahara, Kazunari Ohgaki

    13th International Conference on the Physics and Chemistry of Ice (PCI2014)　2014/03

  84. Hydrogen-Atom Hopping between Guest Species in CO2 Hydrates

    Motoi Oshima, Atsushi Tani, Takeshi Sugahara, Katsuhisa Kitano, Kazunari Ohgaki

    13th International Conference on the Physics and Chemistry of Ice (PCI2014)　2014/03

  85. Trapped Electron in Electron Pulse Irradiated Clathrate Hydrates

    Satoshi Koyama, Atsushi Tani, Kimihiro Norizawa, Takafumi Kondo, Takeshi Sugahara, Kazunari Ohgaki, Koichi Kan, Jinfeng Yang, Yoichi Yoshida

    13th International Conference on the Physics and Chemistry of Ice (PCI2014)　2014/03

  86. Experimental Observation of Competitive Occupancy into the Cages of Structure-II Hydrates during H2 Enclathration

    Takeshi Sugahara, Yuuya Fujisawa, Akio Nishikawa, Kazuma Kitamura, Takahiro Yamazaki, Yuuki Matsumoto, Kazunari Ohgaki

    13th International Conference on the Physics and Chemistry of Ice 2014 (PCI2014)　2014/03

  87. ガスハイドレートの機能と応用

    菅原 武

    日本真空学会関西支部第６回実用技術セミナー「メタンハイドレート資源開発状況と利用技術動向」　2013/12/13

  88. Phase Behavior for Carbon Dioxide + Cyclopentane Derivative Mixed Hydrate Systems

    Yuuki Matsumoto, Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    13th International Conference on Properties and Phase Equilibria for Products and Process Design (PPEPPD2013)　2013/05

  89. Increasing the Energy Storage Capacity of Clathrate Hydrates with Hydrogen and Methane

    Yuuki Matsumoto, R. Gary Grim, Takeshi Sugahara, Kazunari Ohgaki, E. Dendy Sloan, Carolyn A. Koh, Amadeu K. Sum

    13th International Conference on Properties and Phase Equilibria for Products and Process Design (PPEPPD2013)　2013/05

  90. ガスハイドレートの熱力学的安定性とゲスト分子の籠占有性

    菅原 武

    化学工学会第44回秋季大会　2012/09/21

  91. Possibility of Carboxylic Acid Formation by Radiolysis of CO2 Hydrate on Mars

    Motoi Oshima, Shinsuke Kitani, Atsushi Tani, Katsuhisa Kitano, Takeshi Sugahara, Kazunari Ohgaki

    43rd Lunar and Planetary Science Conference　2012/03

  92. ガスハイドレート利用研究の現状と課題

    菅原 武

    第４回化学工学会３支部合同福井大会　2011/12/09

  93. Thermal Stabilities of Radiation-Induced Radicals in CO2 Hydrate

    Motoi Oshima, Atsushi Tani, Katsuhisa Kitano, Takeshi Sugahara, Kazunari Ohgaki

    13th International Conference on Luminescence and Electron Spin Resonance Dating　2011/07

  94. Structural Phase Transitions of Methane+Ethane Mixed-gas Hydrate Induced by 1,1-Dimethylcyclohexane

    Yuuki Matsumoto, Hiroshi Miyauchi, Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    7th International Conference on Gas Hydrates (ICGH7)　2011/07

  95. Enhancement of Hydrogen Storage Rate in Pre-treated Semi-clathrate Hydrates

    Takaaki Tsuda, Shingo Amano, Yuuya Fujisawa, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    7th International Conference on Gas Hydrates (ICGH7)　2011/07

  96. Effect of Ionic Liquid on Hydrate Formation Rate in Carbon Dioxide Hydrates

    Takashi Makino, Yuuki Matsumoto, Hiroki Masuda, Takeshi Sugahara, Kazunari Ohgaki

    7th International Conference on Gas Hydrates (ICGH7)　2011/07

  97. Identification of Products Induced by gamma-ray Irradiation in CO2 Hydrate

    Motoi Oshima, Shinsuke Kitani, Atsushi Tani, Katsuhisa Kitano, Takeshi Sugahara, Kazunari Ohgaki

    7th International Conference on Gas Hydrates (ICGH7)　2011/07

  98. Structural Stability of (t-BuNH2-H2/CH4) Binary Hydrates

    Pinnelli S.R. Prasad, Takeshi Sugahara, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh

    7th International Conference on Gas Hydrates (ICGH7)　2011/07

  99. Molecular Storage of Hydrogen in Simple and Binary Clathrate Hydrates

    Takeshi Sugahara, Pinnelli S.R. Prasad, Vahid Taghikhani, Takaaki Tsuda, Kazunari Ohgaki, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh

    7th International Conference on Gas Hydrates (ICGH7),　2011/07

  100. Large-Cage Occupancy of Molecular Hydrogen in Binary Clathrate Hydrates Dependent on Pressures

    Takeshi Sugahara, Pinnelli S.R. Prasad, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh, Kazunari Ohgaki

    12th International Conference on Physics and Chemistry of Ice (PCI2010)　2010/09/09

  101. Effect of Cyclopentane on Cage Occupancy of Hydrogen in Clathrate Hydrates

    Takaaki Tsuda, Shunsuke Hashimoto, Takeshi Sugahara, Kazunari Ohgaki

    12th International Conference on Physics and Chemistry of Ice (PCI2010)　2010/09/09

  102. In-situ Raman Observation on Aqueous solution around Tetra-n-Butyl Ammonium Bromide Semi-Clathrate Hydrate

    Motoi Oshima, Shunsuke Hashimoto, Wataru Shimada, Atsushi Tani, Takeshi Sugahara, Kazunari Ohgaki

    12th International Conference on Physics and Chemistry of Ice (PCI2010)　2010/09/09

  103. In-situ ESR Observation of Free Radicals in Gas Hydrates under High Pressure

    Atsushi Tani, Kenji Takato, Takeshi Sugahara, Kazunari Ohgaki, Kei Takeya

    12th International Conference on Physics and Chemistry of Ice (PCI2010)　2010/09/09

  104. Decay Mechanisms of Radiation-Induced Radicals in Sulfur Hexafluoride Clathrate Hydrate

    Kenji Takato, Atsushi Tani, Takeshi Sugahara, Kei Takeya, Kazunari Ohgaki

    12th International Conference on Physics and Chemistry of Ice (PCI2010)　2010/09/09

  105. Raman Spectroscopic Analysis of Mixed Gas Hydrate Crystals

    Hiroko Mimachi, Masahiro Takahashi, Toru Iwasaki, Takahiro Kinoshita, Takeshi Sugahara, Hiroshi Sato, Kazunari Ohgaki

    12th International Conference on Physics and Chemistry of Ice (PCI2010)　2010/09/07

  106. Hydrogen Storage in tri‐Methylamine Clathrates

    Pinnelli S. R. Prasad, Takeshi Sugahara, E. Dendy, Sloan, Amadeu, K. Sum, Carolyn A. Koh

    XXII INTERNATIONAL CONFERENCE ON RAMAN SPECTROSCOPY　2010/08

  107. Experimental Approaches to Natural-gas Recovery from Natural-Gas Hydrate Field

    Takeshi Sugahara

    Symposium on Methane Hydrate Recovery & CO2 Sequestration　2010/03/03

  108. Application Possibilities of Clathrate Hydrates - Current & Challenge

    Takeshi Sugahara

    The 6th International Chemical Engineering Congress& Exhibition　2009/11/16

  109. Hydrogen Storage in Clathrate Hydrates

    Joanna C. Haag, Takeshi Sugahara, Pinnelli S.R. Prasad, Ashleigh A. Warntjes, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh

    Fall 2009 Meeting of the Four Corners Section of the APS　2009/10

  110. Hydrogen Storage in Clathrate Hydrates: the Tuning Effect

    Takeshi Sugahara, Joanna, C. Haag, Pinnelli S.R. Prasad, Ashleigh A. Warntjes, E. Dendy Sloan, Amadeu K. Sum, Carolyn A. Koh

    5th Eastern Clathrate Conference - Hydrate Day 2009　2009/10

  111. Storage Capacity of Hydrogen in Gas Hydrates

    Takaaki Tsuda, Kyohei Ogata, Shunsuke Hashimoto, Takeshi Sugahara, Hiroshi Sato, Kazunari Ohgaki

    Joint AIRAPT-22 & HPCJ-50 International Conference on "High Pressure Science and Technology"　2009/07

  112. Phase Equilibrium Relations of Methylcyclohexanol Stereoisomer Hydrates Helped by Methane - Effect of Substitution Site –

    Takashi Makino, Michiko Mori, Takeshi Sugahara, Kazunari Ohgaki

    6th International Conference on Gas Hydrates (ICGH6)　2008/07

  113. ESR Spectral Analysis of Free Radicals in Irradiated Gas Hydrates below 77 K

    Atsushi Tani, Kei Takeya, Takeshi Sugahara, Kazunari Ohgaki

    6th International Conference on Gas Hydrates (ICGH6)　2008/07

  114. Cage Occupancies of Hydrogen Molecule and Thermodynamic Stabilities of Hydrogen-Containing Hydrates

    Takeshi Sugahara, Shunsuke Hashimoto, Hiroki Mori, Jun Sakamoto, Kyohei Ogata, Kazunari Ohgaki

    6th International Conference on Gas Hydrates (ICGH6)　2008/07

  115. Thermodynamic Stability of Mixed Gas Hydrates Containing Hydrogen

    Shunsuke Hashimoto, Takeshi Sugahara, Masato Moritoki, Hiroshi Sato, Kazunari Ohgaki

    The Joint 21st AIRAPT & 45th EHPRG International Conference on "High Pressure Science and Technology"　2007/09

  116. ガスハイドレート研究の現状−基礎から応用まで−

    菅原 武

    日本材料学会 第5回極限環境部門委員会　2006/09/22

  117. Fundamental Studies for A New H2 Separation Method Using Gas Hydrates

    Shunsuke Hashimoto, Shu Murayama, Takeshi Sugahara, Kazunari Ohgaki

    Physics and Chemistry of Ice 2006 (PCI2006)　2006/07

  118. Effects of Large Guest Species on Thermodynamic Properties of Structure-H Hydrates

    Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    Physics and Chemistry of Ice 2006 (PCI2006)　2006/07

  119. Investigation of Methane Hydrate Dissociation through Decay of Radiation-Induced Methyl Radical in Methane Hydrate

    Kei Takeya, Kouhei Nango, Takeshi Sugahara, Atsushi Tani, Kazunari Ohgaki

    Physics and Chemistry of Ice 2006 (PCI2006)　2006/07

  120. Isothermal Phase Equilibria for the Mixed Gas Hydrate Systems

    Takashi Makino, Takeshi Sugahara, Kazunari Ohgaki

    5th International Conference on Gas Hydrates (ICGH5)　2005/06

  121. Radicals Induced by gamma-ray Irradiation in Gas Hydrates

    Kei Takeya, Kouhei Nango, Atsushi Tani, Takeshi Sugahara, Kazunari Ohgaki

    5th International Conference on Gas Hydrates (ICGH5)　2005/06

  122. ガスハイドレート利用研究の現状と課題

    菅原 武

    第16回中四国伝熱セミナー・阿波池田　2004/09/11

  123. Crystal Structures and Gas Content of NGH

    Takeshi Sugahara, Takashi Makino, Kazunari Ohgaki

    International Forum of Natural Gas Hydrate Carrier　2004/03

  124. Small Cage-Occupancy of Guest Species in the Ethane, Ethylene and Cyclopropane Hydrate Systems

    Takeshi Sugahara, Keisuke Sugahara, Kazunari Ohgaki

    Fourth International Conference on Gas Hydrates (ICGH4)　2002/06

  125. NEMD Studies of Surface Heterogeneity Effects on Gas Permeation through Carbon Membranes

    Takeshi Sugahara, Shin-ichi Furukawa, Tomoshige Nitta

    Fifth International Conference on Inorganic Membranes　1998/06

Social Activities 10

  • Gas Hydrate Innovation Hub toward Industrial Commercialization, Japan (committee member)

    2016/04 - 2019/03

  • 令和元年度科学講演会

    奈良県立青翔中学校、高等学校

    2019/06 -

  • 青少年のための科学の祭典 － ２０１７おもしろ科学まつり － 和歌山大会

    青少年のための科学の祭典・和歌山大会実行委員会

    2017/11 -

  • Gas Hydrate Workshop

    Research Institute of Petroleum Industry, Iran

    2009/11 -

  • 夏の小学生科学体験教室

    大阪大学総合学術博物館・とよなかサイエンスネット実行委員会

    2008/08 -

  • 夏の小学生科学体験教室

    大阪大学 総合学術博物館

    2007/08 -

  • 大阪大学イノベーションセミナー2004

    大阪大学

    2004/10 -

  • 文部科学省 平成15年度サイエンスパートナーシッププログラム(SPP)

    2003/12 -

  • 大阪大学 総合学術博物館 第2回企画展

    大阪大学 総合学術博物館

    2003/10 -

  • 大阪大学 総合学術博物館 設立記念展

    大阪大学 総合学術博物館

    2002/10 -

Media Coverage 4

  1. 高効率蓄熱システム 融点制御 ムダなく冷やす

    2023/05

  2. 室温で小さな圧力→多くの熱を出し入れ 原子力機構など、固体冷媒の候補発見

    日刊工業新聞

    2019/03

  3. メタンハイドレート保存 大気圧中も可能 零下10度で阪大が実験

    日経産業新聞

    2003/02

  4. 天然ガスをボール状に

    日本工業新聞

    2002/01

Academic Activities 10

  1. Japanese Society of Latent Heat Engineers (committee member)

    2018/12 - Present

  2. 化学工学会（基礎物性部会 幹事）

    2016/05 - Present

  3. 10th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS '24)

    10th MTMS organizing committee

    2023/06/13 - 2024/08/31

  4. Chief Session Organizer, International Chemical Engineering Symposia 2021

    The Society of Chemical Engineers, Japan

    2021/03/20 - 2021/03/20

  5. Chief Session Organizer, International Chemical Engineering Symposia 2020

    The Society of Chemical Engineers, Japan

    2020/03/17 - 2020/03/19

  6. ACS Journal of Chemical & Engineering Data (Editorial Advisory Borad)

    2015/01 - 2017/12

  7. Session Organizer, 18th Asian Pacific Confederation of Chemical Engineering Congress (APCChE 2019)

    APCChE

    2019/09 -

  8. 8th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS '18)

    8Th MTMS Organizing Committee

    2018/09 -

  9. Session Organizer, 45th Autumn Meeting of The Society of Chemical Engineers, Japan

    化学工学会

    2013/09 -

  10. The 53rd High Pressure Conference of Japan

    日本高圧力学会

    2012/11 -

Institutional Repository 30

Content Published in the University of Osaka Institutional Repository (OUKA)

  1. Phase equilibria of carbon dioxide + sulfur hexafluoride mixed gas hydrate as fundamental data toward improving the mechanical properties of marine sediments

    Ishikawa Tasuku, Sugahara Takeshi, Hirai Takayuki, Yoshimoto Norimasa

    Fluid Phase Equilibria　Vol. 599　2025/07/09

  2. Tetra-n-butylammonium Tricarboxylate Semiclathrate Hydrates as Phase Change Materials: Phase Equilibrium Relations and Memory Effect in Reformation

    Minamikawa Kazuhiro, Shimada Jin, Sugahara Takeshi, Hirai Takayuki

    Energy and Fuels　Vol. 39　No. 14　p. 7104-7109　2025/03/26

  3. Effect of Anions on the Memory Effect in the Tetra-n-butylammonium Dicarboxylate Semiclathrate Hydrate Reformation

    Minamikawa Kazuhiro, Shimada Jin, Sugahara Takeshi, Hirai Takayuki

    Industrial and Engineering Chemistry Research　Vol. 63　No. 43　p. 18435-18440　2024/10/21

  4. Effects of Halide Anions on the Electrical Conductivity in Single-Crystalline Tetra-n-butylammonium Salt Semiclathrate Hydrates

    Shimada Jin, Sugahara Takeshi, Tani Atsushi, Ueda Takahiro, Tsugaya Riko, Tsunashima Katsuhiko, Hirai Takayuki

    Energy and Fuels　Vol. 38　No. 7　p. 6471-6477　2024/04/04

  5. Thermodynamic Properties of Tetra-n-butylammonium and Tetra-n-butylphosphonium Hydroxycarboxylate Semiclathrate Hydrates

    Minamikawa Kazuhiro, Shimada Jin, Sugahara Takeshi, Hirai Takayuki

    Journal of Chemical and Engineering Data　Vol. 68　No. 12　p. 3492-3498　2023/12/14

  6. Separation of Propane and Propylene by Urea Clathrate Formation

    Kobatake Ryosuke, Sugahara Takeshi, Hirai Takayuki

    Industrial and Engineering Chemistry Research　Vol. 62　No. 49　p. 21380-21384　2023/12/13

  7. Quasi-elastic neutron scattering studies on fast dynamics of water molecules in tetra- n -butylammonium bromide semiclathrate hydrate

    Shimada Jin, Tani Atsushi, Yamada Takeshi, Sugahara Takeshi, Hirai Takayuki, Okuchi Takuo

    Applied Physics Letters　Vol. 123　No. 4　2023/07/26

  8. Quasi-elastic neutron scattering studies on fast dynamics of water molecules in tetra-n-butylammonium bromide semiclathrate hydrate

    Shimada Jin, Tani Atsushi, Yamada Takeshi, Sugahara Takeshi, Hirai Takayuki, Okuchi Takuo

    Applied Physics Letters　Vol. 123　No. 4　2023/07/26

  9. Proton conduction in tetra-n-butylammonium bromide semiclathrate hydrate

    Shimada Jin, Takaoka Yuta, Ueda Takahiro, Tani Atsushi, Sugahara Takeshi, Tsunashima Katsuhiko, Yamada Hirohisa, Hirai Takayuki

    Solid State Ionics　Vol. 393　2023/05/01

  10. Peritectic phase behavior of tetra-n-butylphosphonium trifluoroacetate semiclathrate hydrate

    Shimada Jin, Shimada Masami, Azuma Sakura, Sugahara Takeshi, Tsunashima Katsuhiko, Hirai Takayuki

    Fluid Phase Equilibria　Vol. 567　2023/01/11

  11. Effect of introducing a cyclobutylmethyl group into an onium cation on the thermodynamic properties of ionic clathrate hydrates

    Azuma Sakura, Shimada Jin, Tsunashima Katsuhiko, Sugahara Takeshi, Hirai Takayuki

    New Journal of Chemistry　Vol. 47　No. 1　p. 231-237　2023/01/07

  12. Equilibrium Phase Relations and Dissociation Enthalpies of Tri- n-butylalkenylphosphonium Bromide Semiclathrate Hydrates

    Azuma Sakura, Shimada Jin, Tsunashima Katsuhiko, Sugahara Takeshi, Tani Atsushi, Hirai Takayuki

    Journal of Chemical and Engineering Data　Vol. 67　No. 6　p. 1415-1420　2022/05/25

  13. Thermodynamic Properties of Tetra-n-butylphosphonium Dicarboxylate Semiclathrate Hydrates

    Shimada Jin, Yamada Moe, Tani Atsushi, Sugahara Takeshi, Tsunashima Katsuhiko, Tsuchida Yusuke, Hirai Takayuki

    Journal of Chemical and Engineering Data　Vol. 67　No. 1　p. 67-73　2022/01/13

  14. Phase equilibrium temperature and dissociation enthalpy in the tri-n-butylalkylphosphonium bromide semiclathrate hydrate systems

    Shimada Jin, Shimada Masami, Sugahara Takeshi, Tsunashima Katsuhiko, Takaoka Yuta, Tani Atsushi

    Chemical Engineering Science　Vol. 236　2021/06/08

  15. Phase equilibrium relations for tetra-n-butylphosphonium acetate semiclathrate hydrate systems in the presence of methane, carbon dioxide, nitrogen, or ethane

    Shimada Masami, Shimada Jin, Sugahara Takeshi, Tsunashima Katsuhiko

    Fluid Phase Equilibria　Vol. 488　p. 48-53　2019/06/01

  16. Phase equilibrium relations of tetra-n-butylphosphonium propionate and butyrate semiclathrate hydrates

    Shimada Jin, Shimada Masami, Sugahara Takeshi, Tsunashima Katsuhiko

    Fluid Phase Equilibria　Vol. 485　p. 61-66　2019/04/15

  17. Phase Equilibrium Relations of Semiclathrate Hydrates Based on Tetra- n-butylphosphonium Formate, Acetate, and Lactate

    Shimada Jin, Shimada Masami, Sugahara Takeshi, Tsunashima Katsuhiko, Tani Atsushi, Tsuchida Yusuke, Matsumiya Masahiko

    Journal of Chemical and Engineering Data　Vol. 63　No. 9　p. 3615-3620　2018/09/13

  18. Dissociation and Nucleation of Tetra-n-butyl Ammonium Bromide Semi-Clathrate Hydrates at High Pressures

    Sugahara Takeshi, Machida Hironobu

    Journal of Chemical and Engineering Data　Vol. 62　No. 9　p. 2721-2725　2017/09/14

  19. Four-phase equilibrium relations including clathrate hydrate phase in a ternary system of xenon, benzene, and water

    Sugahara Takeshi

    Journal of Chemical and Engineering Data　Vol. 61　No. 12　p. 4057-4060　2016/12/08

  20. Phase behavior of ethane hydrate system in the presence of ammonium bromide

    Bando Tatsuya, Sugahara Takeshi

    Fluid Phase Equilibria　Vol. 413　p. 36-40　2016/04/15

  21. High-pressure phase equilibria of tertiary-butylamine hydrates with and without hydrogen

    Tanabe Tomohiro, Sugahara Takeshi, Kitamura Kazuma, Yamazaki Takahiro, Fujimoto Takashi, Ohgaki Kazunari

    Journal of Chemical and Engineering Data　Vol. 60　No. 2　p. 222-227　2015/02/12

  22. Nucleophilic reactions of bromocyclopentane in the structure-h methane + bromocyclopentane mixed hydrate system at high pressures

    Matsumoto Yuuki, Katsuta Yoshito, Kamo Fumitaka, Bando Tatsuya, Makino Takashi, Sugahara Takeshi, Ohgaki Kazunari

    Journal of Physical Chemistry B　Vol. 118　No. 47　p. 13404-13408　2014/07/11

  23. Thermodynamic stability boundaries and structures of methane + monohalogenated cyclopentane mixed hydrates

    Matsumoto Yuuki, Matsukawa Hiroaki, Kamo Fumitaka, Jeon Young Bae, Katsuta Yoshito, Bando Tatsuya, Makino Takashi, Sugahara Takeshi, Ohgaki Kazunari

    Journal of Chemical and Engineering Data　Vol. 59　No. 7　p. 2294-2297　2014/07/10

  24. In situ Raman spectra of hydrogen in large cages of hydrogen+tetrahydrofuran mixed hydrates

    Nishikawa Akio, Tanabe Tomohiro, Kitamura Kazuma, Matsumoto Yuuki, Ohgaki Kazunari, Sugahara Takeshi

    Chemical Engineering Science　Vol. 101　p. 1-4　2013/09/20

  25. Structure-H Methane + 1,1,2,2,3,3,4-Heptafluorocyclopentane Mixed Hydrate at Pressures up to 373 Mpa

    Suzuki Sumihiro, Matsumoto Yuuki, Katsuta Yoshito, Hashimoto Shunsuke, Sugahara Takeshi, Ohgaki Kazunari

    Journal of Physical Chemistry A　Vol. 117　No. 20　p. 4338-4341　2013/05/23

  26. Phase Equilibrium Relations and Structural Transition in the 1,1,1,2-Tetrafluoroethane Hydrate System

    Katsuta Yoshito, Suzuki Sumihiro, Matsumoto Yuuki, Hashimoto Shunsuke, Sugahara Takeshi, Ohgaki Kazunari

    Journal of Chemical and Engineering Data　Vol. 58　No. 5　p. 1378-1381　2013/05/09

  27. 温和な条件における分子状水素貯蔵媒体の探求

    菅原 武

    大阪大学低温センターだより　Vol. 157　p. 1-5　2012/01

  28. Thermodynamic stability of H2 + tetrahydrofuran mixed gas hydrate in nonstoichiometric aqueous solutions

    Hashimoto Shunsuke, Sugahara Takeshi, Sato Hiroshi, Ohgaki Kazunari

    Journal of Chemical and Engineering Data　Vol. 52　No. 2　p. 517-520　2007/03/01

  29. Phase equilibria for H2 + CO2 + H2O system containing gas hydrates

    Sugahara Takeshi, Murayama Shu, Hashimoto Shunsuke, Ohgaki Kazunari

    Fluid Phase Equilibria　Vol. 233　No. 2　p. 190-193　2005/06/30

  30. Thermodynamic Stability of Gas Hydrates and Cage Occupancy of Guest Molecules

    Sugahara Takeshi