慶應義塾大学 大村研究室 Ohmura Laboratory



1st July 2022

Publications

2022

202. Taro Iwai, Iku Ohta, Kai Hiraga, Keita Kashima, Atsushi Hotta, Ryo Ohmura. “Measurements of phase equilibrium temperature and dissociation heat of tetrabutylphosphonium glutarate ionic semiclathrate hydrate”, Fluid Phase Equilibria, 2022, Vol.562, DOi:10.1016/j.fluid.2022.113561.(2022/7/25)

201. Akari Gibo, Seiya Nakao, Sayaka Shiraishi, Satoshi Takeya, Shigeo Tomura, Ryo Ohmura, Keita Yasuda, “Development of dual functional methodology for seawater desalination and salt manufacture by carbon dioxide hydrate formation”, accepted for publication in Desalination, MSID: DES-D-22-00649.(2022/6/23)

200. Meku Maruyama, Shun Kao, Hitoshi Kiyokawa, Satoshi Takeya, Ryo Ohmura, “Continuous CO2 Separation from a N2 + CO2 Gas Mixture Using Clathrate Hydrate: Insights into Sustainable Post-combustion Carbon Capture”, Energy & Fuels, 2022, DOI: 10.1021/acs.energyfuels.2c01355.(2022/6/9)

199. Taro Iwai, Takashi Miyamoto, Naruki Kurokawa, Atsushi Hotta, Ryo Ohmura, “Synthesis and evaluation of green phase change materials for efficient air conditioning by tetrabutylphosphonium phosphate ionic semiclathrate hydrate”, Journal of Energy Storage, Vol.52, Part A, 2022, DOI: 10.1016/j.est.2022.104801.

198. Hitoshi Kiyokawa, Takashi Miyamoto, Satoshi Takeya, Iku Ota, Taro Iwai, Atsushi Hotta, Ryo Ohmura, “Thermodynamic Properties of Hydrates as Cooling Phase Change Materials for the Implementation on Electric Vehicles”, New Journal of Chemistry, 2022, DOI: 10.1039/d2nj00097k. (2022/3/29).

197. Hitoshi Kiyokawa, Yuri Kondo, Ryo Koyama, Naruki Kurokawa, Atsushi Hotta, Saman Alavi, Iku Ota, Ryo Ohmura, “Pinacol Hydrate as A Novel Thermal Energy Storage”, accepted for publication in Journal of Energy Storage, Vol. 51, 2022, Paper ID: 104404, DOI: 10.1016/j.est.2022.104404. (2022/3/09).

196. Meku Maruyama, Ryo Ohmura,“Equilibrium properties and crystal growth of D2O + cyclopentane hydrate for sustainable tritium separation, The Canadian Journal of Chemical Engineering, 2022, DOI: 10.1002/cjce.24493. (2022/3/3)

195. Takashi Miyamoto, Naruki Kurokawa, Iku Ota, Atsushi Hotta, Ryo Ohmura,“Synthesis and thermophysical property evaluation of ionic semiclathrate hydrate formed with tetrabutylphosphonium glycine as a chilling temperature phase change material”,Journal of Energy Storage, Vol. 45, 2022, 103773; DOI: 10.1016/j.est.2021.103773

2021

194. Hitoshi Kiyokawa, Masamichi Kodera, Maxence Lassiège, Saman Alavi, Ryo Ohmura, “Measurement and analysis of interfacial tension of decane/water system pressurized with methane + ethane + propane gas mixture”,Journal of Natural Gas Science and Engineering, Vol. 96, 2021, 104333; DOI: 10.1016/j.jngse.2021.104333.

193. Sota Shigehara, Ryo Ohmura,“Investigation of Crystal Growth of CO2 Hydrate in Aqueous Fructose Solution for The Potential Application in Carbonated Solid Foods”, Food Chemistry, Ms. Ref. No.: FOODCHEM-D-21-04750R1, DOI:10.1016/j.foodchem.2021.131369 (2021/10/20).

192. Tomomi Hatsugai, Hitoshi Kiyokawa, Satoshi Takeya, Ryo Ohmura, “Improved Operation of Continuous Ozone Hydrate Production”, Chemical Engineering&Technology, DOI:10.1002/ceat.202100071 (2021/07/18).

191. Mikihiro Tanaka, Keita Tsugane, Daiki Suga, Shigeo Tomura, Ryo Ohmura, Keita Yasuda,“Simultaneous Crystallization of Cyclopentane Hydrate and Sodium Chloride for Desalination and Salt Manufacture”, ACS Sustainable Chemistry & Engineering, Vol.9, 2021, pp.9078-9084, DOI:10.1021/acssuschemeng.1c02356.

190. Hitoshi Kiyokawa, Hiroki Tokutomi, Shinichi Ishida, Hiroaki Nishi, Ryo Ohmura, “Thermal Energy Storage Performance of Tetrabutylammonium Acrylate Hydrate as Phase Change Materials”, Applied Sciences, Vol.11, 2021, Paper ID.4848; DOI:10.3390/app11114848.

189. Meku Maruyama, Riku Matsuura, Ryo Ohmura, “Crystal growth of clathrate hydrate formed with H2 + CO2 mixed gas and tetrahydropyran”, Scientific Reports, Vol.11, 2021, PaperID: 11315; DOI: 10.1038/s41598-021-90802-6.

188. Masamichi Kodera, Satoshi Takeya, Maxence Lassiège, Saman Alavi, Ryo Ohmura, “Characterization of clathrate hydrate formed in H2 + CO2 + tetrahydropyran + water system as carbon capture materials”, Fuel, Vol.295, 2021, Paper ID: 120593; DOI:10.1016/j.fuel.2021.120593.

187. Riku Matsuura, Saman Alavi, Ryo Ohmura, “Crystal Growth of Structure‑H Hydrate with Water-Soluble Large Molecule Guest Compound: 1‑Methylpiperidine as a Case Study”, Crystal Growth & Design, Vol.21, 2021, pp.1351-1357; DOI: 10.1021/acs.cgd.0c01638.

186. Riku Matsuura, Kosuke Watanabe, Yuji Yamauchi, Haruka Sato, Li-Jen Chen, Ryo Ohmura, “Thermodynamic analysis of hydrate-based refrigeration cycle”, Energy, Vol.220, 2021, Paper ID: 119652; DOI: 10.1016/j.energy.2020.119652.

185. Yuri Kondo, Saman Alavi, Satoshi Takeya, Ryo Ohmura, “Characterization of the Clathrate Hydrate Formed with Fluoromethane and Pinacolone: The Thermodynamic Stability and Volumetric Behavior of the Structure H Binary Hydrate”, The Journal of Physical Chemistry B, Vol.125, 2021, pp.328-337; DOI: 10.1021/acs.jpcb.0c09818.

2020

184. Satoshi Takeya, Sanehiro Muromachi, Akihiro Hachikubo, Ryo Ohmura, Kazuyuki Hyodo, Akio Yoneyama, “X-Ray attenuation and image contrast in the X-ray computed tomography of clathrate hydrates depending on guest species”, Physical Chemistry Chemical Physics, Vol.22, 2020, pp.27658-27665; DOI: 10.1039/d0cp05466f.

183. Riku Matsuura, Kazuya Ozawa, Saman Alavi, Ryo Ohmura, “Crystal Growth of Clathrate Hydrate with Ozone: Implication on Ozone Preservation”, ACS Sustainable Chemistry and Engineering, Vol.8, 2020, pp.15678-15684; DOI: 10.1021/acssuschemeng.0c05345.

182. Rihito Nakane, Yusuke Shimosato, Eito Gima, Ryo Ohmura, Izuru Senaha, Keita Yasuda, “Phase equilibrium condition measurements in carbon dioxide hydrate forming system coexisting with seawater”, The Journal of Chemical Thermodynamics, Vol.152, 2021, Paper ID: 106276; DOI: 10.1016/j.jct.2020.106276

181. Masamichi Kodera, Tomoyuki Matsueda, Rodion V. Belosludov, Ravil K Zhdanov, Vladimir R. Belosludov, Satoshi Takeya, Saman Alavi, and Ryo Ohmura, “Physical Properties and Characterization of the Binary Clathrate Hydrate with Methane + 1,11,3,3,-pentafluoropropane(HFC-245fa) + water”, The Journal of Physical Chemistry C, Vol.124, 2020, pp.20736-20745; DOI: 10.1021/act.jpcc.0c05565

180. Tomomi Hatsugai, Ryutaro Nakayama, Shigeo Tomura, Ryo Akiyoshi, Shirou Nishitsuka, Ryo Nakamura, Satoshi Takeya, Ryo Ohmura, “Development and Continuous Operation of Bench Scale System for production of O3+O2+CO2 Hydrates”, Chemical Engineering and Technology, Vol.43, 2020, pp. 2307-2314; DOI: 10.1002/ceat.202000044.

179. Parisa Naeiji , Tom K, Woo, Saman Alavi, Ryo Ohmura, “Molecular dynamics simulations of interfacial properties of the CO2-water and CO2-CH4-water systems”, Journal of Chemical Physics,Vol.153, 2020, Paper ID: 044701; DOI: 10.1063/5.0008114

178. Hitoshi Kiyokawa, Shunsuke Horii, Saman Alavi, Ryo Ohmura, “Improvement of continuous hydrate-based CO2 separation by forming structure II hydrate in the system of H2 + CO2 + H2O + Tetrahydropyran (THP)”, Fuel, Vo. 278, 2020, Paper ID: 118330; DOI: 10.1016/j.fuel.2020.118330

177. Takashi Miyamoto, Ryo Koyama, Naruki Kurokawa, Atsushi Hotta, Saman Alavi, Ryo Ohmura, “Thermophysical property measurements of tetrabutylphosphonium oxalate (TBPOx) ionic semiclathrate hydrates as a media for the thermal energy storage system”, Frontiers in Chemistry, just accepted; DOI: 10.3389/fchem.2020.00547

176. Hironori Nagashima, Takuto Miyagi, Keita Yasuda, Ryo Ohmura, “Clathrate Hydrates at Temperatures below the Freezing Point of Water: A Review”, Fluid Phase Equilibria, 2020, Vol. 517, 2020, Paper ID: 112610; DOI: 10.1016/j.fluid.2020.112610

175. Ryo Koyama, Li-Jen Chen, Saman Alavi, Ryo Ohmura, “Impoving thermal efficiency of hydrate-based heat engine generating renewable energy from low-grade heat sources using a crystal engineering approach”, Energy, Vol. 198, 2020, Paper ID: 117403; DOI: 10.1016/j.energy.2020.117403

174. Yuri Kondo, Saman Alavi, Kotaro Murayama, Ahmad Ruiz, Satoshi Takeya, Ryo Ohmura, “Effect of Help-Guest Size and Hydrogen Bonding on the Stability of N Methylpiperidine Structure H Clathrate Hydrate”, The Journal of Physical Chemistry C, Vol. 124, 2020, pp. 5978-5986; DOI: 10.1021/acs.jpcc.9b11910

173. Ryo Koyama, Atsushi Hotta, Ryo Ohmura, “Equilibrium temperature and dissociation heat of tetrabutylphosphonium acrylate (TBPAc) ionic semi-clathrate hydrate as a medium for the hydrate-based thermal energy storage system”, The Journal of Chemical Thermodynamics, Vol.144, 2020, Paper ID. 106088; DOI: 10.1016/j.jct.2020.106088

2019

172. Masamichi Kodera, Kosuke Watanabe, Maxence Lassiège, Saman Alavi, Ryo Ohmura, "Interfacial tension between decane saturated with methane and water from 283.2 K to 298.2 K under pressures upto 10 MPa", Journal of Industrial and Engineering Chemistry, Available online 21 September 2019, DOI: 10.1016/j.jiec.2019.09.026

171. Riku Matsuura, Shunsuke Horii, Saman Alavi, Ryo Ohmura, "Diversity in Crystal Growth Dynamics and Crystal Morphology of Structure-H Hydrate", Crystal Growth & Design, Vol.11, 2019, pp. 6398-6404; DOI: 10.1021/acs.cgd.9b00870.

170.Yen-An Chen, Liang-Kai Chu, Che-Kang Chu, Ryo Ohmura, Li-Jen Chen, "Synthesis of Methane Hydrate from Ice Powder Accelerated by Doping Ethanol into Methane Gas", Scientific Reports,Vol.9, 2019, Paper ID. 12345, DOI:10.1038/s41598-019-48832-8

169.Kotaro Nemoto, Takumi Ikeda, Hiroyuki Mori, Saman Alavi, Satoshi Takeya and Ryo Ohmura, “Stability and Characterization of the Structure II Binary Clathrate Hydrate of the Refrigerant Trans-1,3,3,3-tetrafluoropropene + Methane”, New Journal of Chemistry,Vol.43, 2019,pp13068-13074; DOI: 10.1039/C9NJ02605C.

168. Ryo Koyama, Yuta Arai, Yuji Yamauchi, Satoshi Takeya, Fuyuaki Endo, Atsushi Hotta, Ryo Ohmura, “Thermophysical Properties of Trimethylolethane (TME) Hydrate as Phase Change Material for Cooling Lithium-ion Battery in Electric Vehicle”, Journal of Power Sources, accepted for publication on April 13, 2019; DOI: org/10.1016/j.jpowsour.2019.04.055.

167. Parisa Naeiji, Tom Woo, Saman Alavi, Farshad Varaminian, Ryo Ohmura, “Interfacial Properties of Hydrocarbon/Water Systems Predicted by Molecular Dynamic Simulations”, The Journal of Chemical Physics, Vol. 150, 2019, pp114703; DOI: org/10.1063/1.5078739, Available online

166. Kazuya Ozawa, Ryo Ohmura, "Crystal Growth of Clathrate Hydrate with Methane plus Partially Water Soluble Large-Molecule Guest Compound", Criystal Growth & Design, accepted for publication on January 16, 2019; DOI: 10.1021/acs.cdg.8b01625, Available online

2018

165. Yuta Arai, Ryo Koyama, Fuyuaki Endo, Atushi Hotta, Ryo Ohmura, "Thermophysical property measurements on tetrabutylphosphonium sulfate ionic semicalthrate hydrate consisting of the bivalent anion", The Journal of Chemical Thermodynamics, 2018, DOI: 10.1016/j.jct.2018.11.017, Available online

164. Yuta Arai, Satoshi Takeya, Saman Alavi, Yuji Yamauchi, Ryo Ohmura, "Effect of Non-Spherical Encapsulated Guests on the Volumetric behavior of Structure H Clathrate Hydrates", The Journal of Physical Chemistry C, 2018, DOI: 10.1021/acs.jpcc.8b09923, Available online

163. Rihito Nakane, Eito Gima, Ryo Ohmura, Izuru Senaha, Keita Yasuda, "Phase equilibrium condition measurements in carbon dioxide hydrate forming system coexisting with sodium chloride aqueous solutions", The Journal of Chemical Thermodynamics, Vol. 130, 2019, pp192-197; DOI: 10.1016/j.jct.2018.10.008

162. Hironori D. Nagashima, Kotaro Nemoto, Ryo Ohmura, “Phase equilibrium for argon clathrate hydrate at the temperatures from 197.6 K to 274.1 K”, The Journal of Chemical Thermodynamics, accepted for publication on July 22,2018Volume127,2018, pp86-91; DOI: 10.1016/j.jct.2018.07.019

161.Kosuke Watanabe, Hironori D. Nagashima, Ryo Nakamura, Ryo Ohmura, “Thermodynamics simulation for continuous formation of ozone hydrates”, ACS Sustainable Chemistry & Engineering, accepted for publication on July 19, 2018;MSID-sc-2018-01859q.R1

160. Satoshi Takeya, Saman Alavi, Shunsuke Hashimoto, Keita Yasuda, Yuji Yamauchi, Ryo Ohmura, “Distortion of the Large Cages Encapsulating Cyclic Molecules and Empty Small Cages of Structure II Clatherate Hydrates”, The Journal of Physical Chemistry, Volume122, pp18134-18141; DOI: 10.1021/acs.jpcc.8b05314.

159. Shunsuke Horii, Ryo Ohmura, “Continuous separation of CO2 from a H2+CO2 gas mixture using clathrate hydrate”, Applied Energy, Vol. 225, 2018, pp78-84; DOI:10.1016/j.apenergy.2018.04.105.

158. Keita Yasuda, Ryo Ohmura, Amadeu K. Sum, “Guest-guest and guest-host interactions in ethanol, propan-1-ol, and propan-2-ol clathrate hydrate forming systems”, New Journal of Chemistry, Vol.42, 2018, pp7364-7370; DOI: 10.1039/c8nj00750k

157. Yuta Arai, Yuji Yamauchi, Hiroki Tokutomi, Fuyuaki Endo, Atsushi Hotta, Saman Alavi, Ryo Ohmura, “Thermophysical property measurements of tetrabutylphosphonium acetate (TBPAce) ionic semiclathrate hydrate as thermal energy storage medium for general air conditioning systems”, International Journal of Refrigeration, Vol. 88, 2018, pp102-107; DOI: 10.1016/j.ijrefrig.2017.12.020.

156. Kazuki Fukuzawa, Kosuke Watanabe, Keita Yasuda, Ryo Ohmura, “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”, The Journal of Chemical Thermodynamics, Vol. 119, 2018, pp20-25; DOI: 10.1016/j.jct.2017.12.011.

2017

155. Sanehiro Muromachi, Hiroyuki Miyamoto, Ryo Ohmura, “Solubility of nitrogen gas in aqueous solution of tetra-n-butylammonium bromide”, International Journal of Thermophysics, Vol.38, 2017, pp173; DOI:10.1007/s13.0765-017-2310-y

154. Yugo Ohfuka, Naruki Fukushima, Zheguang Chen, Masao Fukuda, Satoshi Takeya, Ryo Ohmura, “Phase equilibria for Kr hydrate formed with 2,2-dimethylbutane, methylcyclohexane and 1-methylpiperidine”, The Journal of Chemical Thermodynamics, available online; DOI: 10.1016/j.jct.2017.07.038.

153. Naruki Fukushima, Satoshi Shiratori, Takeshi Makiya, Takashi Murakami, Ryo Ohmura, “Phase equilibrium condition measurements in the clathrate hydrate forming system of (propan-2-ol + carbon dioxide + water) at temperatures between 250.8 K and 265.7 K”, The Journal of Chemical Thermodynamics, Vol. 115, 2017, pp114-118; DOI: 10.1016/j.jct.2017.07.036.

152. Shun Oya, Muhammad Aifaa, Ryo Ohmura, “Formation, growth and sintering of CO2 hydrate crystals in liquid water with continuous CO2 supply: implication for subsurface CO2 sequestration”, International Journal of Greenhouse Gas Control, Vol. 63, 2017, pp386-391; DOI: 10.1016/j.ijggc.2017.06.007.

151. Yuji Yamauchi, Tatsuro Yamasaki, Fuyuaki Endo, Atsushi Hotta, Ryo Ohmura, “Thermodynamic Properties of Ionic Semiclathrate Hydrate Formed with Tetrabutylammonium Propionate”, Chemical Engineering & Tecnology, Vol. 40, 2017, pp1810-1816; DOI: 10.1002/ceat.201600459.

150. Hironori D. Nagashima, Saman Alavi, Ryo Ohmura, “Preservation of carbon dioxide clathrate hydrate in the presence of fructose or glucose and absence of sugars under freezer conditions”, Journal of Industrial and Engineering Chemistry, Vol. 54, 2017, pp.332-340; DOI: 10.1016/j.jiec.2017.06.011.

149. Yuji Yamauchi, Yuta Arai, Tatsuro Yamasaki, Fuyuaki Endo, Atsushi Hotta, Ryo Ohmura, “Phase equilibrium temperature and dissociation heat of ionic semiclathrate hydrate formed with tetrabutylammonium butyrate”, Fluid Phase Equilibria, available online; DOI: 10.1016/j.fluid.2017.02.001.

148. Hiroaki Hayama, Kazuki Fukuzawa, Keita Yasuda, Ryo Ohmura, “Interfacial tension between ( methane + ethane + propane ) gas mixture and water from 283.2 K to 298.2 K under up to 10 MPa”, The Journal of Chemical Thermodynamics, Vol. 108, 2017, pp. 71-75; DOI: 10.1016/j.jct.2017.01.007.

2016

147. Yuki Nema, Ryo Ohmura, Izuru Senaha, Keita Yasuda, “Quadruple point determination in carbon dioxide hydrate forming system”, Fluid Phase Equilibria, available online; DOI: 10.1016/j.fluid.2016.12.014.

146. Saman Alavi, Ryo Ohmura, “Understanding decomposition and encapsulation energies of structure I and II clathrate hydrates”, The Journal of Chemical Physics, Vol. 145, 2016, Paper ID. 154708; DOI: 10.1063/1.4964673.

145. Hiroaki Hayama, Makoto Mitarai, Hiroyuki Mori, Jonathan Varrett, Phillip Servio, Ryo Ohmura, “Surfactant Effects on Crystal Growth Dynamics and Crystal Morphology of Methane Hydrate Formed at Gas/Liquid Interface”, Crystal Growth & Design, available online, DOI: 10.1021/acs.cgd.6b01124.

144. Hironori D. Nagashima, Ryo Ohmura, “Phase equilibrium condition measurements in methane clatherate hydrate forming system from 197.3 K to 238.7 K”, The Journal of Chemical Thermodynamics Vol.102, 2016, pp. 252-256, DOI: 10.1016/j.jct.2016.07.018.

143. Satoshi Takeya, Hiroshi Fujihisa, Hiroshi Yamawaki, Yoshito Gotoh, Ryo Ohmura, Saman Alavi and John A. Ripmeester, “Phase Transition of the Structure II Cubic-Structrure Clathrate Hydrate to a Tetragonal Structure Form” Angewandte Chemie, accepted for publication, DOI: 10.1002/anie.201602733

142. Satoshi Takeya, Konstantin A.Udachin, Igor L. Moudrakovski, Ryo Ohmura, “Disorder of Hydrofluorocarbon Molecules Entrapped in the Water Cages of Structure I Clathrate Hydrate” Chemistry-A European Journal, Vol.22, Issue 22, pp7567-7573, 2016 : DOI: 10.1002/chem.201600122.

141. Thaneer Malai Narayanan, Ryo Ohmura. “Influence of hydrate structure on continuous separation of coal bed methane gas: A thermodynamic simulation study” Journal of Natural Gas Science & Engineering, available online, DOI: 10.1016/j.jngse.2016.03.063.

140. Hiroaki Hayama, Hotaka Akiba, Ryo Ohmura, “Crystal Growth of Ionic Semiclathrate Hydrate Formed at interface between CO2 + N2 Gas Mixture and Tetrabutylammonium Bromide Aqueous Solution” The Korean Journal of Chemical Engineering, Vol. 33, Issue 6, 2016, pp. 1942-1947; DOI: 10.1007/s11814-016- 0035-4.

139. Sanehiro Muromachi, Konstantin A. Udachin, Saman Alavi, Ryo Ohmura and John A. Ripmeester, “Selective occupancy of methane by cage symmetry in TBAB ionic clathrate hydrate” Chemical Communications, available online, DOI: 10.1039/C6CC00264.

138. Hotaka Akiba, Ryo Ohmura, “Interfacial tension between CO2 + N2 Gas and Tetrabutylammonium Bromide Aqueous Solution” The Journal of Chemical Thermodynamics, Vol. 97, pp83-87, 2016; DOI: 10.1016/j.jct.2016.01.014.

137. Yugo Ofuka, Ryo Ohmura, “Theoretical performance analysis of hydrate-based heat engine system suitable for low-temperature driven power generation” Energy, Vol. 101, pp27-33, 2016; DOI: 10.1016/j.energy.2016.01.095.

136. Keita Yasuda, Yasuhiko H. Mori, and Ryo Ohmura, “Interfacial Tension Measurements in Water-Methane System at Temperatures from 278.15 K to 298.15 K and Pressures up to 10 MPa” Fluid Phase Equilibria, Vol. 413, pp170-175, 2016; DOI: 10.1016/j.fluid.2015.10.006.

135. Kyosuke Fujiura, Yu Nakamoto, Yoshihiro Taguchi, Ryo Ohmura, Yuji Nagasaka, “Thermal conductivity measurements of semiclathrate hydrates and aqueous solutions of tetrabutylammonium bromide (TBAB) and tetrabutylammonium chloride (TBAC) by the transient hot-wire using parylene-coated probe”, Fluid Phase Equilibria, Vol. 413 , pp129-136, 2016; DOI: 10.1016/j.fluid.2015.09.024.

134. Hironori D. Nagashima, Naruki Fukushima and Ryo Ohmura, “Phase equilibrium condition measurements in carbon dioxide clathrate hydrate forming system from 199.1 K to 247.1 K”, Fluid Phase Equilibria, Vol. 413, pp53-56, 2016; DOI: 10.1016/j.fluid.2015.09.020.

133. Hironori D. Nagashima , Satoshi Takeya , Tsutomu Uchida, and Ryo Ohmura, “Preservation of carbon dioxide clathrate hydrate in the presence of trehalose under freezer conditions” Scientific Reports, Vol. 6, 19354, 2016; DOI: 10.1038/srep19354.

132. Hotaka Akiba and Ryo Ohmura, “Surface tension between CO2 Gas and Tetra-n-butylammonium Bromide Aqueous Solution”, The Journal of Chemical Thermodynamics, Vol. 92, pp72-75, 2016; DOI: 10.1016/j.jct.2015.08.039.

2015

131. Thaneer Malai Narayanan, Kazuki Imasato, Satoshi Takeya, Saman Alavi, and Ryo Ohmura, “Structure and Guest Dynamics in Binary Clathrate Hydrates of Tetrahydropyran with Carbon Dioxide/Methane” The Journal of Physical Chemistry C, Vol. 119, Issue 46, pp25738-25746,2015; DOI: 10.1021/acs.jpcc.5b08220.

130. Tomoki Yoshioka, Yuji Yamamoto, Takeshi Yokomori, Ryo Ohmura, Toshihisa Ueda,“Experimental study on combustion of a methane hydrate sphere” Experiments in Fluids, Vol. 56, Issue 10, No. 192, 2015, DOI: 10.1007/s00348-015-2041-4.

129. Hiroki Ueno, Hotaka Akiba, Satoru Akatsu and Ryo Ohmura, “Crystal Growth of Clathrate Hydrates Formed with Methane + Carbon Dioxide Mixed Gas at Gas/liquid Interface and in Liquid Water”, New Journal of Chemistry, Vol. 39, Issue 11, 2015, pp8254-8262; DOI: 10.1039/C5NJ01080B.

128. Takayuki Kobori, Sanehiro Muromachi, Tatsuo Yamasaki, Satoshi Takeya, Yoshitaka Yamamoto, Ryo Ohmura, “Phase Behavior and Structural Characterization of Ionic Clathrate Hydrate Formed with Tetra-n-butylphosphonium Hydroxide: Discovery of Primitive Crystal Structure”, Crystal Growth & Design, Vol. 15, Issue 8, 2015, pp. 3862-3867; DOI: 10.1021/acs.cgd.5b00484.

127. Hotaka Akiba, Hiroki Ueno, Ryo Ohmura, “Crystal Growth of Ionic Semiclathrate Hydrate Formed at the interface between CO2 Gas and Tetra-n-butylammonium Bromide Aqueous Solution”, Crystal Growth & Design, Vol. 15, Issue 8, 2015, pp. 3963-3968; DOI: 10.1021/acs.cgd.5b00595.

126. Muhammad Aifaa, Kazuki Imasato, and Ryo Ohmura, “Clathrate Hydrate Crystal Growth in Natural Gas Saturated Water Flow”, Crystal Growth & Design, Vol. 15, Issue 6, 2015, pp.2853-2858; DOI:10.1021/acs.cgd.5b00281.

125. Masaki Hiratsuka, Ryo Ohmura, Amadeu K. Sum, Saman Alavi, and Kenji Yasuoka, “Molecular dynamics study of guest-host hydrogen bonding in alcohol clathrate hydrates”, Physical Chemistry Chemical Physics, Vol. 17, pp. 12639-12647, 2015; DOI:10.1039/C4CP05732E

124. Sanehiro Muromachi, Masato Kida, Satoshi Takeya, Yoshitaka Yamamoto, Ryo Ohmura, “Characterization of the ionic clathrate hydrate of tetra-n-butylammonium acrylate”, Canadian Journal of Chemistry, Vol. 93, Issue 9, 2015, pp954-959; DOI: 10.1139/cjc-2014-0539.

123. Kazuki Imasato, Kotaro Murayama, Satoshi Takeya, Saman Alavi, Ryo Ohmura, “Effect of nitrogen atom substitution in cyclic guests on properties of sH clathrate hydrates”, Canadian Journal of Chemistry, Vol. 93, Issue 8, 2015, pp. 906-912; DOI: 10.1139/cjc-2014-0553.

122. Shuhei Tomita, Satoru Akatsu, Ryo Ohmura, “Experiments and thermodynamic simulations for continuous separation of CO2 from CH4 +CO2 gas mixture utilizing hydrate formation” Applied Energy, Vol. 146, Issue 15, 2015, pp.104-110; DOI: 10.1016/j.apenergy.2015.01.088.

121. Sanehiro Muromachi, Atsushi Shijima, Hiroyuki Miyamoto, Ryo Ohmura, “Experimental measurements of carbon dioxide solubility in aqueous tetra-n-butylammonium bromide solutions”, The Journal of Chemical Thermodynamics, Vol. 85, 2015, pp. 94-100; DOI: 10.1016/j.jct.2015.01.008

120. Muhammad Aifaa, Takehide Kodama, and Ryo Ohmura, “Crystal Growth of Clathrate Hydrate in Flowing Liquid Water System Saturated with Methane Gas”, Crystal Growth & Design, Vol. 15, Issue 2, 2015, pp. 559-563; DOI: 10.1021/cg500992c

119. Makoto Mitarai, Masatoshi Kishimoto, Donguk Suh, and Ryo Ohmura, “SURFACTANT EFFECTS ON CRYSTAL GROWTH OF CLATHRATE HYDRATE AT THE INTERFACE OF WATER AND HYDROPHOBIC-GUEST LIQUID”, Crystal Growth & Design, Vol. 15, Issue 2, 2015, pp. 812-821; DOI: 10.1021/cg501613a.

118. Kazuki Imasato, Hiroki Tokutomi, and Ryo Ohmura, “Crystal Growth Behavior of Methane Hydrate in the Presence of Liquid Hydrocarbon”, Crystal Growth & Design, Vol. 15, Issue 1, 2015, pp. 428?433; DOI: 10.1021/cg501500w.

2014

117. Masaki Hiratsuka, Ryo Ohmura, Amadeu K. Sum, Saman Alavi, and Kenji Yasuoka, “Molecular dynamics study of guest-host hydrogen bonding in alcohol clathrate hydrates”, Physical Chemistry Chemical Physics, published online as accepted manuscript; DOI:10.1039/C4CP05732E

116. Takayuki Kobori, Sanehiro Muromachi, Ryo Ohmura, “Phase Equilibrium for Ionic Semiclathrate Hydrates Formed in the System of Water + Tetra-n-butylammonium Bromide Pressurized with Carbon Dioxide”, Journal of Chemical and Engineering Data, published online: October 27, 2014; http://dx.doi.org10.1021/je500589z

115. Tsutomu Uchida, Keita Yasuda, Yuya Oto, Renkai Shen and Ryo Ohmura, “Natural supersaturation conditions needed for nucleation air clathrate hydrates in deep ice sheets”, Journal of Glaciology, Vol. 60, 2014, pp. 1111-1116; DOI: 10.3189/2014JoG13J232.

114. Takehide Kodama, Ryo Ohmura, “Crystal Growth of Clathrate Hydrate in Liquid Water in Contact with Methane + Ethane + Propane Gas Mixture”, Journal of Chemical Technology and Biotechnology, Vol. 89, 2014, pp. 1982-1986: DOI 10.1002/jctb.4292.

113. Kotaro Murayama, Satoshi Takeya, Saman Alavi and Ryo Ohmura, “An isotropic Lattice Expansion of Structure H Clathrate Hydrates Induced by Help Guest: Experiments and Molecular Dynamics Simulations”, Journal of Physical Chemistry Part C, Vol. 118, 2014, pp. 21323-21330; DOI: 10.1021/jp5058786.

112. Sanehiro Muromachi, Konstantin A. Udachin, Kyucul Shin, Saman Alavi, Igor L. Moudrakovski, Ryo Ohmura and John A. Ripmeester, “Guest-induced symmetry lowering of an ionic clathrate material for carbon capture”, Chemical Communications, Vol. 50, 2014, pp. 11476-11479; DOI: 10.1039/C4CC02111H.

111. Kazutoshi Shishido, Sanehiro Muromachi, Ryo Nakamura, Satoshi Takeya and Ryo Ohmura, “Increasing molecular O3 storage capacity in a clathrate hydrate”, New Journal of Chemistry, Vol. 38, 2014, pp. 3160-3165; DOI: 10.1039/C3NJ01377D.

110. Kento Iino, Satoshi Takeya, Ryo Ohmura, “Characterization of clathrate hydrates formed with CH4 or CO2 plus tetrahydropyran”, Fuel, Vol. 122, 2014, pp. 270-276.; http://dx.doi.org/10.1016/j.fuel.2014.01.040

109. Sanehiro Muromachi, Satoshi Takeya, Yoshitaka Yamamoto, and Ryo Ohmura, “Characterization of Tetra-n-butylphosphonium Bromide Semiclathrate Hydrate by Crystal Structure Analysis”, CrystEngComm, Vol. 16, 2014, pp. 2056-2060; DOI: 10.1039/C3CE41942H.

108. Kotaro Murayama, Satoshi Takeya, and Ryo Ohmura, “Phase equilibrium and crystallographic structure of clathrate hydrate formed in argon + 2,2-dimethylbutane + water system”, Fluid Phase Equilibria, Vol. 365, 2014, pp. 64-67 ; http://dx.doi.org/10.1016/j.fluid.2013.12.011

107. Makoto Ozaki, Shigeo Tomura, Ryo Ohmura and Yasuhiko H. Mori, “Comparative study of large-scale hydrogen storage technologies: Is hydrate-based storage at advantage over existing technologies?” International Journal of Hydrogen Energy, Vol. 34, 2014, pp. 3327-3341; http://dx.doi.org/10.1016/j.ijhydene.2013.12.080

106. Kento Iino, Yusuke Sakakibara, Takuya Suginaka, and Ryo Ohmura, “Phase Equilibria for Ionic Semiclathrate Hydrate Formed with Tetrabutylphosphonium Chloride plus CO2, CH4, or N2”, The Journal of Chemical Thermodynamics, Vol. 71, 2014, pp. 133-136; doi:10.1016/j.jct.2013.12.001.

105. Wataru Kondo, Kaoru Ohtsuka, Ryo Ohmura, Satoshi Takeya, and Yasuhiko H. Mori, “Clathrate-hydrate formation from a hydrocarbon gas mixture: Compositional evolution of formed hydrate during an isobaric semi-batch hydrate-forming operation”, Applied Energy, Vol. 113, 2014, pp. 864-871; http://dx.doi.org/10.1016/j.apenergy.2013.08.033

104. Tadaaki Sato, Satoshi Takeya, Hironori D. Nagashima, Ryo Ohmura, “Preservation of carbon dioxide clathrate hydrate coexisting with sucrose under domestic freezer conditions”, Journal of Food Engineering, Vol. 120, 2014, pp. 69-74; http://dx.doi.org/10.1016/j.jfoodeng.2013.07.014

2013

103. Satoru Akatsu, Shuhei Tomita, Yasuhiko H. Mori, Ryo Ohmura, “ Thermodynamic simulations of hydrate-based removal of carbon dioxide and hydrogen sulfide from low-quality natural gas ” , Industrial & Engineering Chemistry Research, Vol. 52, 2013, pp. 15165?15176; DOI: 10.1021/ie402010p.

102. Keita Yasuda, Yuya Oto, Renkai Shen, Tsutomu Uchida, and Ryo Ohmura, “Phase equilibrium measurements in nitrogen and air clathrate hydrate forming systems at temperatures below freezing point of water”, Journal of Chemical Thermodynamics, Vol. 67, 2013, pp. 143-147.; http://dx.doi.org/10.1016/j.jct.2013.07.023

101. Sanehiro Muromachi, Hironori D. Nagashima, Jean-Michel Herri, Ryo Ohmura, “Thermodynamic Modeling for Clathrate Hydrates of Ozone”,Journal of Chemical Thermodynamics, Vol. 64, 2013, pp. 193-197. http://dx.doi.org/10.1016/j.jct.2013.05.020.

100. Kyouichi Tezuka, Kotaro Murayama, Satoshi Takeya, Alavi Saman, Ryo Ohmura, “Effect of Guest Size and Conformation on Crystal Structure and Stability of Structure H Clathrate Hydrates: Experimental and Molecular Dynamics Simulation Studies”, Journal of Physical Chemistry Part C, Vol. 117, Issue 20, 2013, pp. 10473-10482; doi: 10.1021/jp4005899.

II. 永冨 達也,田口 良広,大村 亮,長坂 雄次, パリレン絶縁プローブ非定常細線法によるTBABハイドレートの熱伝導率測定, 日本機械学会論文集 B編,79巻802号,2013年6月号, pp. 1155-1163.

99. Shunsuke Koyanagi, Ryo Ohmura, “Crystal growth of ionic semiclathrate hydrate formed in CO2 gas + tetrabutylammonium bromide aqueous solution system”, Crystal Growth & Design, Vol. 13, Issue 5, 2013; pp. 2087-2093; doi:10.1021/cg4001472

98. Fumihito Takeuchi, Masaki Hiratsuka, Ryo Ohmura, Saman Alavi, Amadeu K. Sum, Kenji Yasuoka, “Water Proton Configurations in Structures I, II, and H Clathrate Hydrate Unit Cells”, Journal of Chemical Physics, Vol. 138, Issue 12, 2013, Paper ID124504; doi: 10.1063/4795499.

97. Takuya Suginaka, Hiroki Sakamoto, Kento Iino, Yusuke Sakakibara, Ryo Ohmura, “Phase Equilibrium for Ionic Semiclathrate Hydrate Formed with CO2, CH4, or N2 plus Tetrabutylphosphonium Bromide”, Fluid Phase Equilibria, Vol. 344, 2013, pp. 108-111; http://dx.doi.org/10.1016/j.fluid.2013.01.018.

96. Kyoichi Tezuka, Renkai Shen, Taku Watanabe, Satoshi Takeya, Saman Alavi, John A. Ripmeester, Ryo Ohmura, “Synthesis and characterization of structure H hydrate formed with carbon dioxide and 3,3-dimethyl-2-butanone”, Chemical Communications, Vol. 49, 2013, pp. 505-507; DOI: 10.1039/c2cc37717a.

95. Kai Sato, Hiroki Tokutomi, Ryo Ohmura, “Phase Equilibrium of Ionic Semiclathrate Hydrates formed with Tetrabutylammonium Bromide and Tetrabutylammonium Chloride”, Fluid Phase Equilibria, Vol. 337, 2013, pp. 115-118. http://dx.doi.org/10.1016/j.fluid.2012.09.016

94. Yoshihiro Maruyama, Masaru Joe Fuse, Takeshi Yokomori, Ryo Ohmura, Shigeru Watanabe, Toru Iwasaki, Wataru Iwabuchi and Toshihisa Ueda, “Experimental investigation of flame spreading over pure methane hydrate in a laminar boundary layer”, Proceedings of the Combustion Institute, Vol. 34, 2013, pp. 2131-2138; http://dx.doi.org/10.1016/j.proci.2012.06.179

2012

93. Takahiro Nakajima, Taisuke Kudo, Ryo Ohmura, Satoshi Takeya, Yasuhiko H. Mori, “Molecular Storage of Ozone in a Clathrate Hydrate: An Attempt at Preserving Ozone at High Concentrations”, PLOS ONE, Vol. 7, Issue 11, 2012, e48563. DOI: 10.1371/journal.pone.0048563

92. Masaki Hiratsuka, Ryo Ohmura, Amadeu K. Sum, Kenji Yasuoka, “Vibrational Modes of Methane in the Structure H Clathrate Hydrate from Ab initio Molecular Dynamics Simulation”, Journal of Chemical Physics, Vol. 137, 2012, Paper No. 144306, 2012. http://dx.doi.org/10.1063/1.4757914

91. Satoshi Takeya, Kazumasa Honda, Yoshito Gotoh, Akio Yoneyama, Kazuhiro Ueda, Atsushi Miyamoto, Takeo Hondoh, Akira Hori, Duo Sun, Ryo Ohmura, Kazuyuki Hyodo and Tohoru Takeda, “Diffraction Enhanced X-ray Imaging under Low-Temperature Conditions ? Non-destructive observations of Clathrate Gas Hydrates ?“, Journal of Synchrotron Radiation, Vol. 19, Part 6, 2012, pp. 1038-1042; doi:10.1107/S0909049512033857

90. Yosuke Ishida, Yusuke Takahashi and Ryo Ohmura, “Dynamic Behavior of Clathrate Hydrate Growth in Gas/Liquid/Liquid System”, Crystal Growth & Design, Vol. 12, Issue 6, 2012, pp. 3271-3277; dx.doi.org/10.1021/cg300416x.

89. Renkai Shen, Kyoichi Tezuka, Tsutomu Uchida and Ryo Ohmura, “Hydrate Phase Equilibrium in the System of Carbon Dioxide + 2,2-Dimethylbutane + Water at Temperatures below Freezing Point of Water”, The Journal of Chemical Thermodynamics, Vol. 53, 2012, pp. 27-29; dx.doi.org/10.1016/j.jct.2012.04.014.

88. Masatoshi Kishimoto, Satoshi Iijima and Ryo Ohmura, “Crystal Growth of Clathrate Hydrate at the Interface between Seawater and Hydrophobic-guest Liquid: Effect of Elevated Salt Concentration”, Industrial & Engineering Chemistry Research, Vol. 51, Issue 14, 2012, pp. 5224-5229; dx.doi.org/10.1021/ie202785z.

87. Yasuhiko Mori, Jun-ichi Ochiai and Ryo Ohmura "Using Submarine Heat Pumps for Efficient Gas Production" Energies, 2012, 5(3), 599-604; doi:10.3390/en5030599.

86. Kyoichi Tezuka, Tatsuhiko Taguchi, Saman Alavi, Amadeu K. Sum and Ryo Ohmura “Thermodynamic Stability of Structure H Hydrates Based on the Molecular Properties of Large Guest Molecules”, Energies, Vol. 5, Issue 2, 2012, pp. 459-465. doi: 10.3390/en5020459

85. Toshio Shibata, Hiroshi Yamachi, Ryo Ohmura and Yasuhiko H. Mori, Engineering investigation of hydrogen storage in the form of a clathrate hydrate: conceptual designs of underground hydrate storage silos, International Journal of Hydrogen Energy, Vol. 37, 2012, pp. 7612-7623; doi:10.1016/j.ijhydene.2012.02.037.

84. Sanehiro Muromachi, Ryo Ohmura and Yasuhiko H. Mori, “Phase equilibrium for ozone-containing hydrates formed from an ozone + oxygen gas mixture coexisting with gaseous carbon dioxide and liquid water”, The Journal of Chemical Thermodynamics, Vol. 49, 2012, pp. 1-6. doi:10.1016/j.jct.2012.01.009

83. Masatoshi Kishimoto and Ryo Ohmura, “Correlation of growth rate of hydrate layer at guest/liquid-water interface to mass transfer resistance”, Energies, Vol. 5, Issue 1, 2012, pp. 92-100. doi:10.3390/en5010092

82. Hiratsuka, M.; Ohmura, R.; Sum, A. K.; Yasuoka, K. “Molecular Vibrations of Methane Molecules in the Structure I Clathrate Hydrate from Ab Initio Molecular Dynamics Simulation”, Journal of Chemical Physics, Volume 136, Issue 4, 2012, Article No. 044508. http://dx.doi.org/10.1063/1.3677231

81. Suginaka, T.; Sakamoto, H.; Iino, K.; Takeya, S.; Nakajima, M.; Ohmura, R. “Thermodynamic Properties of Ionic Semiclathrate Hydrate Formed with Tetrabutylphosphonium Bromide”, Fluid Phase Equilibria, Vol. 317, 2012, pp. 25-28; doi:10.1016/j.fluid.2011.12.010.

80. Imai, M.; Oto, Y.; Nitta, S.; Takeya, S.; Ohmura, R. “Phase Equilibrium for Clathrate Hydrates Formed with fluoromethane + Propan-2-ol, 2-Methyl-2-propanol, or 2-Propanone” The Journal of Chemical Thermodynamics, Vol. 47, 2012, pp. 17 ? 20.

2011

79. Sun, D.; Shimono, Y.; Takeya, S.; Ohmura, R. “Preservation of Carbon Dioxide Clathrate Hydrate at Temperatures below the Water Freezing Point under Atmospheric Pressure” Industrial Engineering Chemistry Research, Vol. 50, Issue 24, 2011, pp. 13854-13858.

78. Nakajima, T.; Akatsu, S.; Ohmura, R.; Takeya, S.; Mori, Y. H. “Molecular Storage of Ozone in a Clathrate Hydrate Formed from an O3 + O 2 + CO2 Gas Mixture” Angewandte Chemie International Edition, Vol. 50, Issue 44, 2011, pp. 10340-10343.

77. Sakamoto, H.; Sato, K.; Shiraiwa, K.; Takeya, S.; Nakajima, M.; Ohmura, R. “Synthesis, Characterization and Thermal-Property Measurements of Ionic Semi-Clathrate Hydratesformed with Tetrabutylphosphonium Chloride and Tetrabutylammonium Acrylate”, RSC Advances, Vol. 1, Issue 2, 2011, pp. 315-322; doi:10.1039/C1RA00108F.

76. Ishida, Y., Sakemoto, R.; Ohmura, R., “Crystal growth of clathrate hydrate in gas/liquid/liquid system: Variations in crystal growth behavior”, Chemistry ? A European Journal, Vol. 17, Issue 34, 2011, pp. 9471-9477.

75. Watanabe, S.; Saito, K.; Ohmura, R. “Crystal Growth of Clathrate Hydrate in Liquid Water Saturated with a Simulated Natural Gas”, Crystal Growth & Design, Vol. 11, Issue 7, 2011, pp. 3235-3242.

74. Muromachi, S.; Nakajima, T.; Ohmura, R.; Mori, Y. H., “Phase equilibrium for clathrate hydrates formed from an ozone + oxygen gas mixture coexisting with carbon tetrachloride or 1,1-dichloro-1-fluoroethane”, Fluid Phase Equilibria, Vol. 305, 2011, pp. 145-151.

73. Sakamaki, R.; Sum, A. K.; Narumi, T.; Ohmura, R.; Yasuoka, K. “Thermodynamic Properties of Methane/Water Interface Predicted by Molecular Dynamics Simulations”, Journal of Chemical Physics, Vol. 134, Issue 14, 2011, Paper No. 144702.

72. Lee, J. W., Lu, H., Moudrakovski, I. L.; Ratcliffe, C. I.; Ohmura, R.; Alavi, S.; Ripmeester, J. A. “13C NMR Studies of Hydrocarbon Guests in Synthetic Structure H Gas Hydrates: Experiment and Computation”, Journal of Physical Chemistry A, Vol. 115-9, 2011, pp. 1650-1657.

71. Alavi, S.; Ohmura, R.; Ripmeester, J. A. “A Molecular Dynamics Study Ethanol-Water Hydrogen Bonding in Binary Structure I Hydrate with CO2”, Journal of Chemical Physics, Vol. 134-5, 2011, Paper No. 054702.

70. Saito, K.; Kishimoto, M.; Tanaka, R.; Ohmura, R. “Crystal Growth of Clathrate Hydrate at the Interface between Hydrocarbon-gas Mixture and Liquid Water”, Crystal Growth & Design, Vol. 11, Issue 1, pp. 295-301, 2011.

2010

69. Kondo, W.; Ogawa, H.; Ohmura, R.; Mori, Y. H. “Clathrate-hydrate formation from a hydrocarbon gas mixture: evolution of gas-phase composition in a hydrate-forming reactor,” Energy & Fuels, Vol. 24, Issue 12, pp. 6375-6383, 2010.

68. Muromachi, S., Ohmura, R., Takeya, S., Mori, Y. H., “Clathrate Hydrates for Ozone Preservation,” Journal of Physical Chemistry B, Vol. 114, Issue 35, pp. 11430-11435, 2010.

67. Alavi, S., Takeya, S., Ohmura, R., Woo, T., Ripmeester, J. A., “Hydrogen-bonding alcohol-water interactions in binary ethanol, 1-propanol, and 2-propanol+methane structure II clathrate hydrates,” Journal of Chemical Physics, Vol. 133, Issue 7, Paper No. 074505, 2010.

66. Saito, K., Ohmura, R., Sum, A. K., “Correlation of hydrate-film growth rate at the guest/liquid-water interface to mass transfer resistance,” Industrial & Engineering Chemistry Research, Vol. 49, No. 15, pp. 7102-7103, 2010.

65. Makiya, T., Murakami, T., Takeya, S., Sum, A. K., Alavi, S., Ohmura, R., “Synthesis and characterization of clathrate hydrates containing carbon dioxide and ethanol,” Physical Chemistry Chemical Physics, Vol. 12, Issue 33, pp. 9927-9932, 2010.

64. Nakayama, T., Tomura, S., Ozaki, M., Ohmura, R., Mori, Y. H., “Engineering investigation of hydrogen storage in the form of clathrate hydrates: Conceptual design of hydrate production plants,” Energy & Fuels, Vol. 24, No. 4, pp. 2576-2588, 2010.

63. Kozaki, T., Taguchi, T., Takeya, S., Ohmura, R., “Phase Equilibrium for Structure H Hydrates Formed with Methane plus Cycloheptane, Cycloheptanone, or Oxacycloheptane,” Journal of Chemical and Engineering Data, Vol. 55, Issue 9, pp. 3059-3062, 2010.

62. Sakemoto, R., Sakamoto, H., Shiraiwa, K., Ohmura, R., Uchida, T., “Clathrate hydrate crystal growth at the seawater/hydrophobic-guest-liquid interface,” Crystal Growth & Design, Vol. 10, Issue 3, 2010, pp. 1296-1300.

61. Uchida, T., Ohmura, R., Hori, A., “Raman peak frequencies of fluoromethane molecules measured in the clathrate hydrate crystals: Experimental investigations and density functional theory calculations,” Journal of Physical Chemistry A, Vol. 114, Issue 1, 2010, pp. 317-323.

60. Yasuda, K., Ogawa, H. Ohmura, R., “Phase equilibrium for clathrate hydrates formed with methane + ethane + propane mixtures at temperatures below the freezing point of water”, Journal of Chemical & Engineering Data, Vol. 55, Issue 1, 2010, pp. 358-361.

2009

59. Takeuchi, F., Ohmura, R., Yasuoka, K., “Statistical-thermodynamics modeling of clathrate hydrate forming systems suitable as working media of a hydrate-based refrigeration system,” International Journal of Thermophysics, Vol. 30, Issue 6, 2009, pp. 1838-1852.

58. Yasuda, K., Takeya, S., Sakashita, M., Yamawaki, H., Ohmura, R., “Characterization of the Clathrate hydrate formed with methane and propan-1-ol,” Industrial & Engineering Chemistry Research, Vol. 48, Issue 20, 2009, pp. 9335-9337.

57. Yasuda, K., Takeya, S., Sakashita, M., Yamawaki, H., Ohmura, R., “Binary ethanol-methane clathrate hydrate formation in the system CH4-C2H5OH-H2O: confirmation of structure II hydrate formation,” Journal of Physical Chemistry C, Vol. 113, Issue 28, 2009, pp. 12598-12601.

56. Tanaka, R., Sakemoto, R., Ohmura, R., “Crystal growth of clathrate hydrates formed at the interface of liquid water and gaseous methane, ethane or propane: variations in crystal morphology,” Crystal Growth & Design, Vol. 9, Issue 5, 2009, pp. 2529-2536.

55. Hatakeyama, T., Aida, E., Yokomori, T., Ohmura, R., Ueda, T., “Fire extinction using carbon dioxide hydrate,” Industrial & Engineering Chemistry Research, Vol. 48, Issue 8, 2009, pp. 4083-4087.

54. Nakamura, Y., Katsuki, R., Yokomori, T., Ohmura, R., Takahashi, M., Iwasaki, T., Uchida, K., Ueda, T., “Combustion characteristics of methane hydrate in a laminar boundary layer”, Energy and Fuels, Vol. 23, Issue 2, 2009, pp. 1445-1449.

53. Ogawa, H., Imura, N., Miyoshi, T., Ohmura, R., Mori, Y. H., “Thermodynamic Simulations of Isobaric Hydrate-Forming Operations for Natural Gas Storage”, Energy and Fuels, Vol. 23, Issue 2, 2009, pp. 849-856.

2008

52. Kozaki, T., Takeya, S., Ohmura, R., “Phase Equilibrium and Crystallographic Structures of Clathrate Hydrates Formed in Methane + 2,2-Dimethylpentane + Water System”, Journal of Chemical and Engineering Data, Vol. 53, Issue 12, 2008, pp. 2820-2823.

51. Nakajima, M., Ohmura, R., Mori, Y. H., “Clathrate hydrate formation from cyclopentane-in-water emulsions”, Industrial and Engineering Chemistry Research, Vol. 47, Issue 22, 2008, pp. 8933-8939.

50. Katsuki, D., Ohmura, R., Ebinuma, T., Narita, H., “Visual observation of dissociation of methane hydrate crystals in a glass micromodel: Production and transfer of methane”, Journal of Applied Physics, Vol. 104, 2008, Article No. 083514.

49. Yasuda, K., Ohmura, R., “Phase equilibrium for clathrate hydrates formed with methane, ethane, propane or carbon dioxide at temperatures below the freezing point of water”, Journal of Chemical and Engineering Data, Vol. 53, Issue 9, 2008, pp. 2182-2188.

48. Uchida, T., Ohmura, R., Hori, A., “Critical size for guest molecules to occupy dodecahedral cage of clathrate hydrates”, Journal of Physical Chemistry C, Vol. 112, Issue 12, 2008, pp. 4719-4724.

47. Takeya, S., Yasuda, K., Ohmura, R., “Phase equilibrium for structure II hydrates formed with methylfluoride coexisting with cyclopentane, fluorocyclopentane, cyclopentene, or tetrahydropyran”, Journal of Chemical and Engineering Data, Vol. 53, Issue 2, 2008, pp. 531-534.

2007

46. Sato, E., Miyoshi, T., Ohmura, R., Yasuoka, K., “Phase equilibrium calculations for clathrate hydrates based on a statistical thermodynamic model: an attempt to optimize the Kihara parameters for methane and ethane”, Japanese Journal of Applied Physics, Vol. 46, Issue 9A, 2007, pp. 5944-5950.

45. Miyoshi, T., Imai, M., Ohmura, R., Yasuoka, K., “Thermodynamic stability of type-I and type-II clathrate hydrates depending on the chemical species of the guest substances”, Journal of Chemical Physics, Vol. 126, 2007, 234506.

44. Uchida, T., Takeya, S., Kamata, Y., Ohmura, R., Narita, H., “Spectroscopic measurements on binary, ternary and quaternary mixed-gas molecules in clathrate structures”, Industrial & Engineering Chemistry Research, Vo. 46, Issue 14, 2007, pp. 5080-5087. http://dx.doi.org/ 10.1021/ie070153w

43. Imai, S., Miyake, K., Ohmura, R., Mori, Y. H., “Phase equilibrium for clathrate hydrates formed with difluoromethane or krypton, each coexisting with propan-2-ol, 2-methly-2-propanol or 2-propanone”, J. Chem. Eng. Data, Vol. 52, Issue 3, 2007, pp. 1056-1059.

42. Kobayashi, T., Imura, N., Ohmura, R., Mori, Y. H., “Clathrate hydrate formation by water spraying in a methane + ethane + propane gas mixture: search for the rate-controlling mechanism of hydrate formation in the presence of methylcyclohexane” Energy & Fuels, Vol. 21, Issue 2, 2007, pp. 545-553.

41. Takeya, S., Ohmura, R., “Phase equilibrium for structure-I and structure-H hydrates formed with methylfluoride and methylcyclohexane”, Journal of Chemical and Engineering Data, Vol. 52, Issue 2, 2007, pp. 635-638.

40. Miyoshi, T., Ohmura, R., Yasuoka, K., “Predicting thermodynamic stability of clathrate hydrates based on molecular-dynamics simulations and its confirmation by phase-equilibrium measurements”, Journal of Physical Chemistry C, Vol. 111, Issue 9, 2007, pp. 3799-3802.

39. Miyoshi, T., Ohmura, R., Yasuoka, K., “Molecular dynamics simulations of structure-H hydrates formed with methane and 3,3-dimethylpentane or 2,2-dimethylpentane”, Molecular Simulation, Vol. 33, Issues 1-2, 2007, pp. 65-69.

38. Katsuki, D., Ohmura, R., Ebinuma, T., Narita, H., “Methane hydrate crystal growth in a porous medium filled with methane-saturated liquid water”, Philosophical Magazine, Vol. 87, Issue 7, 2007, pp. 1057-1069.

2006

37. Imai, S., Miyake, K., Ohmura, R., Mori, Y. H., “Phase equilibrium for clathrate hydrates formed with difluoromethane or krypton each coexisting with fluorocyclopentane”, Journal of Chemical and Engineering Data, Vol. 51, Issue 6, 2006, pp. 2222-2224.

36. Takeya, S., Ohmura, R., “Phase Equilibrium for Structure II Hydrates Formed with Krypton Coexisting with Cyclopentane, Cyclopentene or Tetrahydropyran”, Journal of Chemical and Engineering Data, Vol. 51, Issue 5, 2006, pp. 1880-1883.

35. Takeya, S., Hori, A., Uchida, T., Ohmura, R., “Crystal Lattice Size and Stability of Type H Clathrate Hydrates with Various Large-Molecule Guest Substances”, Journal of Physical Chemistry B, Vol. 110, Issue 26, 2006, pp. 12943-12947.

34. Ogawa, T., Itoh, T., Watanabe, K., Tahara, K., Hiraoka, R., Ochiai, J., Ohmura, R., Mori, Y. H., “Development of a Novel Hydrate-Based Refrigeration System: a Preliminary Overview”, Applied Thermal Engineering, Vol. 26, 2006, pp. 2157-2167.

33. Uchida, T., Ohmura, R., Ikeda, I. Y., Nagao, J., Takeya, S., Hori, A. “ Phase Equilibrium Measurements and Crystallographic Analyses on Structure-H Type Gas Hydrate Formed from the CH4-CO2 -Neohexane-Water System”, Journal of Physical Chemistry B, Vol. 110, Issue 10, 2006, pp. 4583-4588.

32. Katsuki, D., Ohmura, R., Ebinuma, T., Narita, H., “Formation, growth and aging of clathrate hydrate crystals in a porous medium”, Philosophical Magazine, Vol. 86, Issue 12, 2006, pp. 1753-1761.

31. Ohmura, R., Takeya, S., Maekawa, T., Uchida, T., “Phase Equilibrium for Structure-H Hydrate Formed with Krypton and 2,2-Dimethylbutane”, Journal of Chemical & Engineering Data, Vol. 51, 2006, pp. 161-163.

2005

30. Ohmura, R., Matsuda, S., Takeya, S., Ebinuma, T., Narita, H., “Phase Equilibrium for Structure-H Hydrates Formed with Methane and Methyl-Substituted Cyclic Ether”, International Journal of Thermophysics, Vol. 26, Issue 5, 2005, pp. 1515-1523.

29. Imai, S., Okutani, K., Ohmura, R., Mori, Y. H., “Phase Equilibrium for Clathrate Hydrates Formed with Difluoromethane + either Cyclopentane or Tetra-n-butylammonium Bromide”, Journal of Chemical & Engineering Data, Vol. 50, 2005, pp. 1783-1786.

28. Ohmura, R., Matsuda, S., Itoh, S., Ebinuma, T., Narita, H., “Formation and Growth of Structure-H Hydrate Crystals on a Water Droplet in Contact with Methane Gas and Large-Molecule Guest-Substance Liquid”, Crystal Growth & Design, Vol. 5, Issue 5, 2005, pp. 1821-1824.

27. Tsuji, H., Kobayashi, T., Okano, Y., Ohmura, R., Yasuoka, K., Mori, Y. H., “Thermodynamic Simulations of Isobaric Hydrate-forming Operations: Formulation of Computational Scheme and Its Application to Hydrate Formation from a Methane + Ethane + Propane Mixture”, Energy & Fuels, Vol. 19, 2005, pp. 1587-1597.

26. Tsuji, H., Kobayashi, T., Ohmura, R., Mori, Y. H., “Hydrate Formation by Water Spraying in a Methane + Ethane + Propane Gas Mixture: an Attempt at Promoting Hydrate Formation Utilizing Large-Molecule Guest Substances for Structure-H Hydrates”, Energy & Fuels, Vol. 19, 2005, pp. 869-876.

25. Uchida, T., Ikeda, I. Y., Takeya, S., Kamata, Y., Ohmura, R., Nagao, J., Zatsepina, O. Y., Buffett, B. A., “Kinetics and Stability of CH4-CO 2 Mixed Gas Hydrates during Formation and Long-Term Storage”, ChemPhysChem, Vol. 6, 2005, pp. 646-654.

24. Ohmura, R., Matsuda, S., Uchida, T., Ebinuma, T., Narita, H., “Clathrate Hydrate Crystal Growth in Liquid Water Saturated with a Guest Substance: Observations in Methane + Water System”, Crystal Growth & Design, Vol. 5, Issue 3, 2005, pp. 953-957.

23. Takeya, S., Uchida, T., Nagao, J., Ohmura, R., Shimada, W., Kamata, Y., Ebinuma, T., and Narita, H., “Particle size effect of CH4 hydrate for self-preservation”, Chemical Engineering Science, Vol. 60, 2005, pp. 1383-1387.

22. Ohmura, R., Matsuda, S., Uchida, T., Ebinuma, T., Narita, H., “Phase Equilibrium for Structure-H Hydrates at Temperatures below the Freezing Point of Water”, Journal of Chemical & Engineering Data, Vol. 50, 2005, pp. 993-996.

2004

21. Ohmura, R., Takeya, S. Uchida, T., Ebinuma, T., “Clathrate hydrate formed with methane and 2-propanol: Confirmation of structure-II hydrate formation”, Industrial & Engineering Chemistry Research, Vol. 43, 2004, pp. 4964-4966.

20. Ohmura, R., Takeya, S. Uchida, T., Ikeda, I. Y., Ebinuma, T. and Narita, H. “Clathrate hydrate formation in the system methane + 3-methyl-1-butanol + water: Equilibrium data and crystallographic structures of hydrates”, Fluid Phase Equilibria, Vol. 221, 2004, pp. 151-156.

19. Uchida, T., Takeya, S., Chuvirin, E. M., Ohmura, R., Nagao, J., Yakushev, V. S., Istomin, V. A., Minagawa, H., Ebinuma, T. and Narita, H., “Decomposition of methane hydrates in sand, sandstone, clays, and glass beads”, Journal of Geophysical Research, Vol. 109, B05206, doi:10.1029/2003JB002771, 2004

18. Tsuji, H., Ohmura, R. and Mori, Y. H., “Forming Structure-H Hydrates Using Water Spraying in Methane Gas: Effects of Chemical Species of Large-Molecule Guest Substances”, Energy & Fuels, Vol. 18, 2004, pp. 418-424.

17. Ohmura, R., Shimada, W., Uchida, T., Mori, Y. H., Takeya S., Nagao, J., Minagawa, H., Ebinuma, T. and Narita, H., “Clathrate-hydrate crystal growth in liquid water saturated with a hydrate-forming substance: variations in crystal morphology”, Philosophical Magazine, Vol. 84, 2004, pp. 1-16.

16. Uchida, T., Moriwaki, M., Takeya, S., Ikeda, Y. I., Ohmura, R., Nagao, J., Minagawa, H., Ebinuma, T., Narita, H., Gohara, K., and Mae, S., “Two-step formation process of methane-propane mixed gas hydrates in a batch-type reactor”, AIChE Journal, Vol. 50, 2004, pp. 518-523.

2003

15. Ohmura, R., Uchida, T., Takeya S., Nagao, J., Minagawa, H., Ebinuma, T. and Narita, H., “Clathrate Hydrate Formation in (Methane + Water + Methylcyclohexanone) Systems: the First Phase Equilibrium Data”, Journal of Chemical Thermodynamics, Vol. 35, 2003, pp. 2045-2055.

14. Ohmura, R., Uchida, T., Takeya S., Nagao, J., Minagawa, H., Ebinuma, T. and Narita, H., “Phase Equilibrium for Structure-H Hydrates Formed with Methane and each of Pinacolone (3,3-dimethyl-2-butanone) and Pinacolyl alcohol (3,3-dimethyl-2-butanol)”, Journal of Chemical & Engineering Data, Vol. 48, 2003, 1337-1340.

13. Uchida, T., Ohmura, R., Nagao, J., Takeya, S., Ebinuma, T. and Narita, H., “Viscosity of Aqueous CO2 Solutions Measured by Dynamic Light Scattering”, Journal of Chemical & Engineering Data, Vol. 48, 2003, pp. 1225-1229.

12. Ohmura, R., Ogawa, M., Yasuoka, K. and Mori, Y. H., “Statistical Study of Clathrate-Hydrate Nucleation in a Water/Hydrochlorofluorocarbon System: Search for the Nature of the "Memory Effect"”, Journal of Physical Chemistry B, Vol. 107, 2003, pp. 5289-5293.

11. Sakaguchi, H., Ohmura, R. and Mori, Y. H., “Effects of Kinetic Inhibitors on the Formation and Growth of Hydrate Crystals at a Liquid-Liquid Interface”, Journal of Crystal Growth, Vol. 247, 2003, pp. 631-641.

10. Uchiyama, K., Migita, H., Ohmura, R. and Mori, Y. H., “Gas Absorption into “String-of-Beads” Liquid Flow with Chemical Reaction: Application to Carbon-Dioxide Separation”, International Journal of Heat & Mass Transfer, Vol. 46, 2003, pp. 457-468.

2002

9. Ohmura, R., Kashiwazaki, S., Shiota, S., Tsuji, H. and Mori, Y. H., “Structure-I and Structure-H Hydrate Formation Using Water Spraying”, Energy & Fuels, Vol. 16, 2002, pp. 1141-1147.

8. Ohmura, R., Shigetomi, T. and Mori, Y. H., “Bending Tests on Clathrate Hydrate Single Crystals”, Philosophical Magazine A, Vol. 82, 2002, pp. 1725-1740.

2001

7. Fukumoto, K., Tobe, J., Ohmura, R. and Mori, Y. H., “Hydrate Formation Using Water Spraying in a Hydrophobic Gas: a Preliminary Study”, AIChE Journal, Vol. 47, 2001, pp. 1899-1904.

2000

6. Ohmura, R., Kashiwazaki, S. and Mori, Y. H., “Measurements of Clathrate-Hydrate Film Thickness Using Laser Interferometry”, Journal of Crystal Growth, Vol. 218, 2000, pp. 372-380.

5. Ohmura, R., Shigetomi, T. and Mori, Y. H., “Mechanical Properties of Water/Hydrate-Former Phase Boundaries and Phase-Separating Hydrate Films”, Annals of New York Academy of Sciences, Vol. 912, 2000, pp. 958-966.

1999

4. Ohmura, R. and Mori, Y. H., “Comments on "Solubility of Liquid CO2 in Synthetic Sea Water at Temperatures from 278 K to 293 K and Pressures from 6.44 MPa to 29.49 MPa, and Densities of the Corresponding Aqueous Solutions" (Teng, H.; Yamasaki, A. J. Chem. Eng. Data 1998, 43, 2-5)”, Journal of Chemical & Engineering Data, Vol. 44, 1999, pp. 1432-1433.

I. Ohmura, R. and Mori, Y. H., “Physical Chemistry of Clathrate Hydrates ? an Overview and a State-of-the-Art Review of Fundamental Studies Contributing to Energy and Environmental Technology” (in Japanese), Thermal Science and Engineering, Vol. 7-2, 1999 pp. 35-58.

3. Ohmura, R., Shigetomi, T. and Mori, Y. H., “Formation, Growth and Dissociation of Clathrate Hydrate Crystals in Liquid Water in Contact with a Hydrophobic Hydrate-Forming Liquid”, Journal of Crystal Growth, Vol. 196, 1999, pp. 164-173.

1998

2. Ohmura, R. and Mori, Y. H., “Pull-out Test of Clathrate-Hydrate Films at Water/Hydrochlorofluorocarbon Interfaces”, Journal of Materials Science Letters, Vol. 17, 1998, pp. 1397-1399.

1. Ohmura, R. and Mori, Y. H., “Critical Conditions for CO2 Hydrate Film to Rest on Submarine CO2 Pond Surfaces: A Mechanistic Study”, Environmental Science and Technology, Vol. 32, 1998, pp. 1120-1127.