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Affiliation |
Faculty of Engineering, Division of Materials Science and Chemical Engineering |
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Job Title |
Associate Professor |
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Research Fields, Keywords |
Methane hydrate, Gas hydrate, Semiclathrate hydrate, Thermophysical property of fluid, ガス分離プロセス , Crystal structure analysis |
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Mail Address |
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MUROMACHI Sanehiro
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ORCID
Education 【 display / non-display 】
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2011.4-2013.3
Keio University Doctor Course Completed
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2008.4-2010.3
Keio University Master Course Completed
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2004.4-2008.3
Keio University Graduated
Campus Career 【 display / non-display 】
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2024.4
Duty Yokohama National UniversityFaculty of Engineering Division of Materials Science and Chemical Engineering Associate Professor
Academic Society Affiliations 【 display / non-display 】
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2024.5
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2023.8
The Japan Society of Mechanical Engineers
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2015.9
The Society of Chemical Engineers, Japan
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2013.10
Japan Society of Thermophysical Properties
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2013-2018
Japan Institute of Energy
Research Areas 【 display / non-display 】
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Nanotechnology/Materials / Inorganic materials
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Nanotechnology/Materials / Crystal engineering
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Nanotechnology/Materials / Basic physical chemistry
Papers 【 display / non-display 】
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2-2-2 Fundamental Study on the Mechanical and CO<sub>2</sub> Absorption Properties of TBAB+CO<sub>2</sub>-bearing Sands
FUJIMOTO Takeshi, HATA Toshiro, MIYAMOTO Hiroyuki, MUROMACHI Sanehiro
Proceedings of the Annual Conference of The Japan Institute of Energy 34 ( 0 ) 22 - 23 2025.7 [Reviewed]
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Institute of Energy Joint Work
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P-2-3 Inhibition effect of quaternary ammonium salt on methane hydrate formation
ASANO Ayumu, Takeya Satoshi, SUZUKI Kiyofumi, Tenma Norio, MUROMACHI Sanehiro
Proceedings of the Annual Conference of The Japan Institute of Energy 34 ( 0 ) 198 - 199 2025.7 [Reviewed]
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Institute of Energy Joint Work
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Muromachi, S; Yasuda, N; Masunaga, H; Sugahara, T; Machida, H
CRYSTAL GROWTH & DESIGN 25 ( 15 ) 5936 - 5945 2025.7 [Reviewed]
Authorship：Lead author, Last author, Corresponding author Language：The in addition, foreign language Publishing type：Research paper (scientific journal) Joint Work
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Muromachi, S; Takeya, S; Suzuki, K; Tenma, N
JOURNAL OF CHEMICAL AND ENGINEERING DATA 70 ( 7 ) 2787 - 2796 2025.6 [Reviewed]
Authorship：Lead author, Last author, Corresponding author Language：The in addition, foreign language Publishing type：Research paper (scientific journal) Joint Work
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Muromachi Sanehiro, Takeya Satoshi, Suzuki Kiyofumi, Tenma Norio
Journal of Chemical & Engineering Data 70 ( 7 ) 2787 - 2796 2025.6 [Reviewed]
Authorship：Lead author, Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：American Chemical Society Joint Work
Semiclathrate hydrates are water-based crystalline host–guest materials which consist of water and large ionic substances. To expand their unique functions, investigation into asymmetric quaternary ammonium salts, i.e., n-butyl chains of tetra-n-butylammonium (TBA or N4444 where N and 4 denote nitrogen and n-butyl group, respectively) cation is partly substituted by other group, is necessary. In this study, we report the three-phase (gas–hydrate–liquid) equilibrium data in the systems of (N3444Cl or N4445Cl) + (CH4, CO2 or N2) + H2O up to 10 MPa of the pressure, where 3 and 5 denote n-propyl and n-pentyl, respectively. A total of 99 equilibrium datasets were obtained with aqueous compositions with 0.1, 0.2 and 0.3 of salt mass fraction. Both of N3444Cl and N4445Cl promoted formation conditions of CH4, CO2 and N2 gas hydrates. N3444Cl partly acted as an inhibitor for pure CH4 and CO2 hydrates under some conditions, and it also showed polymorphic phase behavior. Comparison with the literature data for other ionic guests was made. The present findings help understanding of the phase behavior of the semiclathrate hydrates, which can be applied for further development of applications based on these materials.
Review Papers 【 display / non-display 】
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室町実大
クリーンエネルギー ( 12 ) 43 - 49 2024.12
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Single Work
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室町実大
日本エネルギー学会機関誌えねるみくす 103 166 - 172 2024.3
Authorship：Lead author, Last author, Corresponding author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
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Visiting Research in Canada : University of British Columbia
94 ( 1095 ) 56 - 58 2019.1
Language：Japanese Publishing type：Research paper, summary (national, other academic conference) Single Work
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Separation and Storage Based on Gas Hydrates
MUROMACHI Sanehiro
Nihon Enerugii Gakkai Kikanshi Enermix 98 ( 2 ) 187 - 190 2019
Language：Japanese Publishing type：Research paper, summary (national, other academic conference) Publisher：The Japan Institute of Energy Single Work
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Semiclathrate Hydrates : Crystal Structures, Melting Points and Gas Storage Properties
30 ( 3 ) 140 - 147 2016.8
Language：Japanese Publishing type：Research paper, summary (national, other academic conference) Joint Work
Industrial Property Rights 【 display / non-display 】
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口腔摂取用CO2ハイドレートまたは該CO2ハイドレートを含む口腔摂取用複合物、及びそれらの製造方法
辻 愛, 阿野 紀子, 神辺須 雅子, 江口 敬宏, 山本 佳孝, 室町 実大, 水谷 太郎, 山崎 裕一朗, 井上 貴昭, 下條 信威, 榎本 有希
Applicant：日本液炭株式会社, 国立大学法人 筑波大学
Application no：JP2017041049 Date applied：2017.11.15
Publication no：WO2018-096996 Date published：2018.5.31
Patent/Registration no：特許第7058011号 Date registered：2022.4.13
Country of applicant：Domestic Country of acquisition：Domestic
Awards 【 display / non-display 】
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Research Promotion Award for Young Researcher
2015.5 Japan Society of Thermophysical Properties
Individual or group name of awards：Sanehiro Muromachi
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Best Presenter and Promotion Award
2015.2 Japan Institute of Energy
Individual or group name of awards：Sanehiro Muromachi
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President Award
2014.1 National Institute of Advanced Industrial Science and Technology (AIST)
Individual or group name of awards：Hideo Narita,Takao Ebinuma,Jiro Nagao,Yusuke Jin,Masato Kida,Yoshihiro Konno,Hideki Minagawa,Kosuke Egawa,Jun Yoneda,Yoshitaka Yamamoto,Sanehiro Muromachi,Akiko Ono
Grant-in-Aid for Scientific Research 【 display / non-display 】
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社会基盤インフラへのCO2貯留促進を目的としたネガティブエミッション技術の提案
Grant number：24K00980 2024.4 - 2027.3
独立行政法人日本学術振興会 令和６年度科学研究費助成事業 Grant-in-Aid for Scientific Research(B)
Investigator(s)：畠 俊郎
Authorship：Coinvestigator(s) Grant type：Competitive
本研究課題では，微生物機能によるCO2の結晶鉱物化とセミクラスレートハイドレートの生成）の組合せにより社会基盤インフラ（土構造物）の建設・維持管理に適用可能な新たなネガティブエミッション技術を提案する．具体的には，①炭酸脱水酵素を使って砂質土中に高濃度に炭酸を溶解させ炭酸カルシウムの析出を促し骨格構造を形成させる，②この骨格構造中にセミクラスレートハイドレートを生成させ高密度にCO2を固定する，③強度と耐久性の向上効果を得る．という流れを考えている．具体的には，室内試験による有効性検証とあわせ，電解質水溶液物性計算モデル等を組み合わせた予測モデルの開発を通じて現場実装を推進する．
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非対称なイオン性ゲストから生成する準包接水和物のガス分離特性の解明
Grant number：23K03723 2023.4 - 2026.3
日本学術振興会 科学研究費助成事業 Grant-in-Aid for Scientific Research(C)
Investigator(s)：室町 実大
Authorship：Principal investigator Grant type：Competitive
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Grant number：18K13710 2018.4 - 2021.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists
Investigator(s)：Muromachi Sanehiro
Authorship：Principal investigator Grant type：Competitive
In this study, unique CO2 capture properties of semiclathrate hydrates were investigated by gas separation tests, equilibrium measurements and structure analyses. The experiments were performed on four major ionic substances which form semiclathrate hydrates. Experimental parameters were aqueous compositions of ionic substances, pressure and temperature conditions. Based on the tests under H2 + CO2 and CH4 + CO2 mixed gases, it was clarified that different gas capture properties can be obtained by semiclathrate hydrates formed with an ionic substance for the different mixed gas systems.
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Thermodynamic properties and gas capacities of ionic clathrate hydrates for industrial application
Grant number：26820069 2014.4 - 2017.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists(B)
Investigator(s)：Muromachi Sanehiro
Authorship：Principal investigator Grant type：Competitive
"Ionic clathrate hydrates (ICHs) are crystalline compounds which can form at around room temperature. They also incorporate small gases under their gas pressure. Based on these properties, industrial applications for air conditioning and gas separation are suggested. To form ICHs, ionic guest substances are necessary. There is potential to control the functional properties by designing the ionic guests. In this study, ICHs were formed by the tetra-n-butylammonium cation with various organic acid anions, and their properties were characterized.
New ICHs were formed with hydroxycarboxylic anions. ICHs with the carboxylic anions were also formed under a gas pressure to incorporate it. Their formation conditions with CH4 or CO2 gas were measured, and the hydrate phases were identified by X-ray diffraction. Gas separation experiments were also implemented with a CH4 + CO2 mixed gas. From the results, knowledge for controlling the functional properties of ICHs was obtained." -
オゾンをゲスト物質とするクラスレートハイドレートに関する研究
Grant number：11J56572 2011 - 2012
日本学術振興会 科学研究費助成事業 Grant-in-Aid for JSPS Fellows
Investigator(s)：室町 実大
Authorship：Principal investigator Grant type：Competitive
"オゾンは通常、オゾン分子同士で反応し酸素へと分解してしまうため、従来その保存は困難であった。私は、この性質を用いてオゾン分子を一分子ずつ隔離し、長期間かつ高濃度でのオゾンの保存ができることを示し、クラスレートハイドレートを用いたオゾンの保存技術を実用化すべく研究を進めてきた。昨年度までにオゾンハイドレートの生成条件の測定を行い、実用的な温度圧力範囲におけるデータを報告した。本年度は生成条件を予測するための理論モデルの構築を中心に取り組んだ。ハイドレートが生成する際には、原料ガスの組成とハイドレート中に取り込まれるガスの組成は一致しない。そのため、定まった組成を持つ原料ガスから連続的にハイドレートを生成するプロセスにおいては、ガス相およびハイドレート相の組成は時々刻々と変化する。産業利用を目的とした際には、このような組成の変化は品質、効率などに極めて大きく影響するため、組成変化の理論的な予測はハイドレートの産業利用のためには必要不可欠となっている。オゾンハイドレートについても、オゾン、酸素、二酸化炭素からなる混合ガスを用いて生成する必要があるため、理論モデルの構築が求められる。
理論モデルは、実験的に得られた生成条件を良く再現するように分子種に固有の分子間カパラメータを調整することで最適化される。昨年度に報告したオゾンハイドレートの生成条件データを用いてモデルの最適化を行った結果、実験値を良好に再現するモデルを開発することができた。今後、理論モデルによりオゾンハイドレートの生産プロセスについて具体的な検討がなされると期待される。本研究成果は近日中に国際誌に投稿する予定である。"
Other external funds procured 【 display / non-display 】
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Development of rapid themal analysis method under high gas pressure
2021.6 - 2022.4
Private Foundations The Precise Measurement Technology Promotion Foundation
Authorship：Principal investigator
Presentations 【 display / non-display 】
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室町実大
H2Oを科学する・2024 北海道大学低温科学研究所
Event date： 2024.12
Language：Japanese Presentation type：Oral presentation (general)
Venue：北海道大学低温科学研究所 Country：Japan
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Thermophysical properties of semiclathrate hydrates for thermal storage
Sanehiro Muromachi
Event date： 2024.10
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Heat storage properties of semiclathrate hydrates from a structural perspective
Sanehiro Muromachi
2024.9
Event date： 2024.9
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Gas separation properties of semiclathrate hydrate formed by ions with different molecular structures
Kazuki Maesaka; Kanata Murai; Hiroto Kohazama; Hiroyuki Miyamoto; Sanehiro Muromachi
2024.9
Event date： 2024.9
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Thermophysical properties of semiclathrate hydrates for heat storage and gas capture
Sanehiro Muromachi [Invited]
2024.9
Event date： 2024.9
Language：English Presentation type：Oral presentation (invited, special)
Country：Japan
Charge of on-campus class subject 【 display / non-display 】
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2025 Design and Drawing of Machinery and Apparatus
College of Engineering Science
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2025 Transport Phenomena A
College of Engineering Science
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2025 Advanced Fluid Properties
Graduate school of Engineering Science
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2025 New Generation Chemical Process Engineering Studio S
Graduate school of Engineering Science
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2025 New Generation Chemical Process Engineering Studio F
Graduate school of Engineering Science
Charge of off-campus class subject 【 display / non-display 】
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Advanced Fluid Properties
2025.10 Institution：Yokohama National University
Level：Postgraduate
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Fluid Engineering
2024.10 Institution：Yokohama National University
Level：Undergraduate (specialized)
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Advanced Heat Transfer
2024.10 - 2025.2 Institution：Yokohama National University
Level：Postgraduate
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Basic Laboratory for Chemistry, Chemical Engineering and Life Science 1
2024.4 Institution：Yokohama National University
Level：Undergraduate (specialized)
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Experimental Practice in Engineering Science 1
2024.4 Institution：Yokohama National University
Level：Undergraduate (specialized)
Committee Memberships 【 display / non-display 】
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The Japan Association for the Properties of Water and Steam
2025.10
Committee type：Academic society
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日本機械学会 2025年度 熱工学部門 運営委員会
2025.4 - 2026.3 委員
Committee type：Academic society
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The Japan Association for the Properties of Water and Steam
2024.5
Committee type：Academic society
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9th international symposium on Molecular Thermodynamics and Molecular Simulation (MTMS '21) Organizing Committee
2021.7 - 2021.9 Committee member
Committee type：Academic society
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Society of Chemical Engineers, Japan
2018.4 Fundamental Thermophysical Properties Committee Member
Committee type：Academic society