Ohmura, Ryo

写真a

Affiliation

Faculty of Science and Technology, Department of Mechanical Engineering (Yagami)

Position

Professor

Career 【 Display / hide

  • 1999.04
    -
    2000.03

    JSPS Research Fellow (DC1)

  • 2000.04
    -
    2002.03

    JSPS Research Fellow (PD)

  • 2002.04
    -
    2006.03

    Research Scientist, AIST

  • 2006.04
    -
    Present

    Assistant Professor

  • 2009.04
    -
    Present

    慶應義塾大学准教授

Academic Background 【 Display / hide

  • 1996.03

    Keio University, Faculty of Science and Technology, Dapartment of Mechanical Engineering

    University, Graduated

  • 2000.03

    Keio University, -, 機械工学専攻

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • Ph. D., Keio University, Coursework, 2000.03

 

Research Areas 【 Display / hide

  • Basic chemistry (Physical Chemistry)

  • Thermal engineering (Thermal Engineering)

Research Keywords 【 Display / hide

  • Energy

  • Clathrate Hydrates

  • Physical Chemistry

  • Environment

  • Crystal Growth

Research Themes 【 Display / hide

  • Physical Chemistry in Clathrate Hydrate Forming Systems, 

    1996
    -
    Present

 

Papers 【 Display / hide

  • Thermophysical property measurements of tetrabutylphosphonium acetate (TBPAce) ionic semiclathrate hydrate as thermal energy storage medium for general air conditioning systems

    Arai Yuta, Yamauchi Yuji, Tokutomi Hiroki, Endo Fuyuaki, Hotta Atsushi, Alavi Saman, Ohmura Ryo

    International Journal of Refrigeration 88   102 - 107 2018.04

    ISSN  0140-7007

     View Summary

    <p>This paper reports the experimental study on measuring the phase equilibrium temperatures and the dissociation heats of ionic semiclathrate hydrate formed with tetrabutylphosphonium acetate (TBPAce) under atmospheric pressure. The phase equilibrium temperature and the dissociation heat measurements were performed in the range of the mass fraction of TBPAce aqueous solution from 0.10 to 0.42. The highest phase equilibrium temperature was 11.0 °C at the mass fraction range from 0.35 to 0.39. The largest dissociation heat of pure TBPAce hydrate was 192.0 kJ kg–1 at the mass fraction 0.36. The obtained results indicate that TBPAce hydrate would be suitable for a new thermal energy storage medium for general air conditioning systems.</p>

  • Interfacial tension measurements in the (CO2 + H2) gas mixture and water system at temperatures from 271.2 K to 280.2 K and pressures up to 7.0 MPa

    Fukuzawa Kazuki, Watanabe Kosuke, Yasuda Keita, Ohmura Ryo

    Journal of Chemical Thermodynamics 119   20 - 25 2018.04

    ISSN  0021-9614

     View Summary

    <p>This paper reports the experimental values of the interfacial tension between a gas mixture (CO2 + H2) and water measured with the pendant drop method. The measurements were conducted for temperatures from 271.2 K to 280.2 K and pressures up to 7.0 MPa, at increments of 1 MPa. These temperature-pressure ranges were nearly close to the (CO2 + H2) hydrate-stability-zone but each result is obtained without existence of any hydrate. The temperature dependency of the interfacial tension in this system could not be observed, but the interfacial tension decreased almost linearly with increasing pressure, indicating that the observed decrease was caused by an increase in adsorption of the gas phase onto the liquid water with pressure. The gradient of the interfacial tension, with respect to the pressure, was confirmed to be determined by the gas phase composition. The interaction between gases has a marginal influence on the interfacial tension between the (CO2 + H2) gas mixture and water.</p>

  • Solubility of Nitrogen Gas in Aqueous Solution of Tetra-n-Butylammonium Bromide

    Muromachi, Sanehiro, Miyamoto, Hiroyuki, Ohmura, Ryo

    INTERNATIONAL JOURNAL OF THERMOPHYSICS 38 ( 12 ) 20 - 25 2017.12

    Research paper (scientific journal),  ISSN  0195-928X

  • Thermodynamic Properties of Ionic Semiclathrate Hydrate Formed with Tetrabutylammonium Propionate

    Yamauchi, Yuji, Yamasaki, Tatsuro, Endo, Fuyuaki, Hotta, Atsushi, Ohmura, Ryo

    CHEMICAL ENGINEERING & TECHNOLOGY 40 ( 10 ) 1810 - 1816 2017.10

    Research paper (scientific journal),  ISSN  0930-7516

  • Preservation of carbon dioxide clathrate hydrate in the presence of fructose or glucose and absence of sugars under freezer conditions

    Nagashima, Hironori D., Alavi, Saman, Ohmura, Ryo

    JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY 54   332 - 340 2017.10

    Research paper (scientific journal),  ISSN  1226-086X

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Papers, etc., Registered in KOARA 【 Display / hide

Presentations 【 Display / hide

  • 二酸化炭素分離に適したクラスレートハイドレートの探索と物性測定

    Ohmura Ryo

    化学工学会第46回秋季大会, 2014.09, Oral Presentation(guest/special), 公益社団法人 化学工学会

  • Crystallographic structure and thermodynamic stability of clathrate hydrates formed with halogen-containing guests

    Ryo Ohmura

    2012 "Natural Gas Hydrate Systems" Gordon Research Conference (Ventura, CA) , 2012.03, Oral Presentation(guest/special)

  • Crystal growth of clathrate hydrates in hydrophobic-guest fluid + liquid-water systems

    Ohmura Ryo

    ACS 241st National Meeting (Anaheim, CA, USA) , 2011.03, Oral Presentation(guest/special), American Chemical Society

  • Understanding thermodynamics of clathrate hydrates toward energy/environment technology innovations

    Ohmura Ryo

    21st IUPAC International Conference on Chemical Thermodynamics Conference (ICCT-2010) (Tsukuba) , 2010.08, Oral Presentation(guest/special), IUPAC

  • Thermodynamic Simulations of Isobaric Hydrate Forming Operations for Natural Gas Storage

    Naotaka Imura, Hiroyuki Ogawa, Tatsuya Miyoshi, Ryo Ohmura and Yasuhiko H. Mori

    6th International Conference on Gas Hydrates (ICGH 2008) (Vancouver) , 2008.07, Poster (general)

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • 海水と炭酸ガスの炭酸塩晶析反応に関する基礎研究

    2007.07
    -
    2008.03

    受託研究費, Commissioned research

  • クラスレート水和物の結晶モルフォロジー多様性の解明

    2007.04
    -
    2008.03

    Grant-in-Aid for Scientific Research, Research grant

  • シクロペンタンハイドレートの生成特性の解明

    2006.10
    -
    2007.03

    東京電力株式会社, 共同研究費, Joint research

  • クラスレート水和物の結晶構造多様性を利用した省エネルギー天然ガス貯蔵・輸送技術に関する研究

    2005.10
    -
    2006.09

    NEDO, -, Research grant

Intellectual Property Rights, etc. 【 Display / hide

  • 構造Hクラスレート水和物の生成方法

    Announcement No.: 特開2003-3181   

    Patent, Single, National application

  • 気体の分離剤及び気体を分離濃縮するための方法と装置

    Announcement No.: 特開2003-138281   

    Patent, Single, National application

  • 不凍タンパク質を用いた包接化合物の生成制御法

    Announcement No.: 特開2005-89353   

    Patent, Single, National application

  • トレハロースを用いた包接化合物の生成制御法

    Announcement No.: 特開2005-89331   

    Patent, Single, National application

  • 新規構造H水和物

    Announcement No.: 特願2004-355852   

    Patent, Joint, National application

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Awards 【 Display / hide

  • 日本機械学会奨励賞(研究)

    大村 亮, 2004.04, 日本機械学会, クラスレートハイドレートに関する熱工学的研究

    Country: 日本

  • 日本機械学会奨励賞(研究)

    Ohmura Ryo, 2004.04, クラスレートハイドレートに関する熱工学的研究

    Type of Award: Awards of National Conference, Council and Symposium

 

Courses Taught 【 Display / hide

  • GRADUATE RESEARCH ON SCIENCE FOR OPEN AND ENVIRONMENTAL SYSTEMS 2

    2020

  • GRADUATE RESEARCH ON SCIENCE FOR OPEN AND ENVIRONMENTAL SYSTEMS 1

    2020

  • DESIGN PROJECT IN MECHANICAL ENGINEERING

    2020

  • COMPUTATIONAL ANALYSIS OF MECHANICAL PRODUCTS

    2020

  • BACHELOR'S THESIS

    2020

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Social Activities 【 Display / hide

  • ガスハイドレート産業創出イノベーション

    2006.09
    -
    Present

     View Summary

    産業技術総合研究所が主催する研究会の会員.産総研,民間企業,大学から会員を集め,ハイドレート利用技術の事業化へ向けた取り組みを進める.

  • 天然ガスハイドレート製造利用システム実証特別委員会

    2006.08
    -
    2008.03

     View Summary

    上記委員会はNEDOから三井造船(株)と中国電力(株)への委託事業におけるプロジェクトリーダーの諮問機関という位置づけ

  • NEDO平成17年度「天然ガスハイドレート技術の国内市場への適用可能性調査」検討委員会

    2005.04
    -
    2005.07

     View Summary

    NEDOから(財)エネルギー総合工学研究所への委託研究の検討委員会委員

Memberships in Academic Societies 【 Display / hide

  • 日本機械学会, 

    2011.04
    -
    Present
  • 日本機械学会 メカライフ編集委員会, 

    2007.04
    -
    2008.03
  • 日本機械学会熱工学部門 広報委員, 

    2005.04
    -
    2006.03

Committee Experiences 【 Display / hide

  • 2011.04
    -
    Present

    Committee Member, 日本機械学会

  • 2007.04
    -
    2008.03

    Committee Member, 日本機械学会 メカライフ編集委員会

  • 2006.09
    -
    Present

    Member, ガスハイドレート産業創出イノベーション

     View Remarks

    産業技術総合研究所が主催する研究会の会員.産総研,民間企業,大学から会員を集め,ハイドレート利用技術の事業化へ向けた取り組みを進める.

  • 2006.08
    -
    2008.03

    Committee Member, 天然ガスハイドレート製造利用システム実証特別委員会

     View Remarks

    上記委員会はNEDOから三井造船(株)と中国電力(株)への委託事業におけるプロジェクトリーダーの諮問機関という位置づけ

  • 2005.04
    -
    2006.03

    Committee Member, 日本機械学会熱工学部門 広報委員

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