| See also News archive | |
| April, 2025 |
- New publication - K. Minamikawa, J. Shimada, T. Sugahara, T. Hirai: "Tetra-n-butylammonium Tricarboxylate Semiclathrate Hydrates as Phase Change Materials: Phase Equilibrium Relations and Memory Effect in Reformation", Energy & Fuels, 39(14), 7104-7109 (2025). [DOI] |
| April 3, 2025 | Welcome to Mr. Taiju Miki and Mr. Ryosuke Yamaki! They joined in our group as Master course students. |
| March, 2025 |
- New publication - H. Machida, T. Sugahara, H. Hata, T. Ueda, T. Yamazaki, Y. Kimura: "Transmission Electron Microscopy Imaging of Cluster Unit Dissolution from a Single Crystal of Tetra-n-butylammonium Fluoride Semiclathrate Hydrate for Latent-Heat Storage Material", ACS Applied Nano Materials, 8(12), 5919-5925 (2025). [DOI] The joint press release from the University of Osaka and the Hokkaido University was launched on March 21. |
| Dec. 2-3, 2024 | Prof. Sugahara gave an oral presentation at H2O Science 2024 held at the Hokkaido University. |
| Nov. 28-29, 2024 | Prof. Sugahara gave an oral presentation at The 13rd Symposium on Latent Heat Engineering(which website was written in Japanese) held at the Okayama University. |
| Nov. 2, 2024 | Many people joined the lab tour at the autumn university festival. Thank you for coming our lab. How about "burning methane hydrate" and "latent heat storage materials"? |
| October, 2024 |
- New publication - K. Minamikawa, J. Shimada, T. Sugahara, T. Hirai: "Effect of Anions on the Memory Effect in the Tetra-n-butylammonium Dicarboxylate Semiclathrate Hydrate Reformation", Industrial & Engineering Chemistry Research, 63(43), 18435-18440 (2024). [DOI] |
| Sep. 11-13, 2024 | Mr. Ishikawa and Ms. Tsugaya gave oral presentations at SCEJ 55th Autumn Meeting held at the Hokkaido University, Japan. Congratulations, Mr. Ishikawa! He won the Student Best Presentation Awards!. |
| September, 2024 |
- New publication - R. Miyatake, T. Sugahara, T. Ishikawa, M. Oshima, Y. Jin, T. Hirai: "Isothermal Phase Equilibria of the CH4+CO2 Mixed-Gas Hydrate System for CO2 Capture and Storage in a Reservoir after CH4 Hydrate Exploitation", Journal of Chemical & Engineering Data, 69, 3210-3216 (2024). [DOI] |
| Sep. 4-6, 2024 | Mr. Suzuki (collaborator) gave a poster presentation at the The 28th Thermodynamics Conference (Thermodynamics2024) held at TU Delft, Netherlands. |
| Sep. 3, 2024 | Welcome to Mr. Taiju Miki and Mr. Ryosuke Yamaki! They joined in our group as undergraduate students. |
| August 26-29, 2024 | Mr. Ishikawa (OU), Ms. Tsugaya (OU), and Mr. Kawabata (collaborator) gave poster presentations at the 10th International Symposium on Molecular Thermodynamics and Molecular Simulation (MTMS'24) held at Koriyama, Fukushima, Japan. Ms. Tsugaya won a Student Poster Presentation Award! Congratulations!! |
| August 7-8, 2024 | Prof. Sugahara gave an oral presentation at the 33rd Annual Meeting of the Japan Institute of Energy held at the Waseda University, Japan. |
| May 26-29, 2024 | Prof. Sugahara gave a keynote lecture at the 61st Japan Heat Transfer Symposium (Kobe, Japan). |
| April 15, 2024 | Welcome to Mr. Sota Uchiyama! He joined in our group as an undergraduate student. Other undergraduates will be assigned around September. |
| April 8, 2024 | Welcome to Mr. Tasuku Ishikawa and Ms. Riko Tsugaya! They join our group as Master course students. |
| April, 2024 |
- New publication - J. Shimada, T. Sugahara, A. Tani, T. Ueda, R. Tsugaya, K. Tsunashima, T. Hirai: "Effects of Halide Anions on the Electrical Conductivity in Single-Crystalline Tetra-n-butylammonium Salt Semiclathrate Hydrates", Energy & Fuels, 38, 6471-6477 (2024). [DOI] |
| March, 2024 |
- New publications (written in Japanese) - T. Sugahara: "Phase Behavior of Clathrate Hydrates Including Carbon Dioxide", Journal of the Japan Institute of Energy "Enermix", 103, 152-158 (2024). H. Machida, T. Sugahara: "Potential of Clathrate Hydrate as a Cold Storage Material", Journal of the Japan Institute of Energy "Enermix", 103, 173-178 (2024). |
| March 18-20, 2024 | Prof. Sugahara gave an oral presentation at the SCEJ 89th Annual Meeting held at the Osaka Metropolitan University. |
| March 6-7, 2024 | Mr. Shimada gave an oral presentation at Ice Science 2023 held at the Hokkaido University. |
| Feb. 29, 2024 | Congratulations! Mr. Minamikawa won the Prize for Encouragement from the Japan Institute of Energy. He received the award in the ceremony at Tokyo. |
| Jan. 31, 2024 | Congratulations! Mr. Shimada successfully defended his PhD thesis entitled "Thermodynamic and Electrochemical Properties in Semiclathrate Hydrate Systems for Thermal Storage Technology". |
| Jan., 2024 |
- New publication (written in Japanese) - J. Shimada, T. Sugahara, H. Hirai: "Dynamics of Water Molecules around Ions in the Crystalline Solids", Chemistry, 79(1), 33-36 (2024). |
| Jan. 4, 2024 | A Happy New Year! |
| Dec. 27, 2023 |
- New publication - S. Ohkoshi, K. Nakagawa, M. Yoshikiyo, A. Namai, K. Imoto, Y. Nagane, F. Jia, O. Stefanczyk, H. Tokoro, J. Wang, T. Sugahara, K. Chiba, K. Motodohi, K. Isogai, K. Nishioka, T. Momiki, R. Hatano : "Giant adiabatic temperature change and its direct measurement of a barocaloric effect in a charge-transfer solid", Nature Communications, 14, 8466 (2023). [DOI] |
| Dec. 14, 2023 |
- New publication - K. Minamikawa, J. Shimada, T. Sugahara, T. Hirai: "Thermodynamic Properties of Tetra-n-butylammonium and Tetra-n-butylphosphonium Hydroxycarboxylate Semiclathrate Hydrates", Journal of Chemical & Engineering Data, 68, 3492-3498 (2023). [DOI] |
| Dec. 13, 2023 |
- New publication - R. Kobatake, T. Sugahara, T. Hirai: "Separation of Propane and Propylene by Urea Clathrate Formation", Industrial & Engineering Chemistry Research, 62, 21380-21384 (2023). [DOI] |
| Sep. 11-13, 2023 | Mr. Shimada, Mr. Minamikawa and Mr. Miyatake gave oral presentations at SCEJ 54th Autumn Meeting held at the Fukuoka University, Fukuoka, Japan. Congratulations, Mr. Shimada and Mr. Miyatake! They won the Student Good Presentation Awards, respectively. |
| Sep. 4, 2023 | Welcome to Mr. Tasuku Ishikawa and Mr. Fui Tsuchiya! They join our group as undergraduate students. |
| Sep. 4-8, 2023 | Mr. Shimada and Mr. Minamikawa gave oral and poster presentations at the 15th International Conference on the Physics and Chemistry of Ice (PCI2023) held at the Hokkaido University, Japan. |
| August 28-Sep. 1, 2023 | Mr. Kawabata and Ms. Sahara spent a week in our group as a collaborated student and an research internship student, respectively. |
| August 8-9, 2023 | Mr. Shimada and Mr. Minamikawa gave oral presentations at the 32nd Annual Meeting of the Japan Institute of Energy held at the Fukuoka University, Japan. |
| July 26, 2023 |
- New publication - J. Shimada, A. Tani, T. Yamada, T. Sugahara, T. Hirai, T. Okuchi: "Quasi-Elastic Neutron Scattering Studies on Fast Dynamics of Water Molecules in Tetra-n-butylammonium Bromide Semiclathrate Hydrate", Applied Physics Letters, 123(4), 044104-1-6 (2023). [DOI] The press release was published on July 26, which was also introduced in the ReSOU. |
| July 9-14, 2023 | Mr. Shimada (oral), Dr. Machida (collaborator, poster), and Assist. Prof. Sugahara (oral) gave presentations at 10th International Conference on Gas Hydrates (ICGH10) held in Singapore. |
| May, 2023 |
- New publication - J. Shimada, Y. Takaoka, T. Ueda, A. Tani, T. Sugahara, K. Tsunashima, H. Yamada, T. Hirai: "Proton Conduction in Tetra-n-butylammonium Bromide Semiclathrate Hydrate", Solid State Ionics, 393, 116188-1-8 (2023). [DOI] |
| May 21-25, 2023 | Assist. Prof. Sugahara gave a poster presentation at 16th International Conference on Properties and Phase Equilibria for Products and Process Design (PPEPPD2023) held at La Pineda, Tarragona, Spain. |
| May 1, 2023 | In the Nikkan Kogyo Shimbun (a Japanese Newspaper), A part of the research results collaborated with Panasonic was reported. |
| April 10, 2023 | Welcome to Ms. Riko TSUGAYA! She joins our group as an undergraduate student. |
| April, 2023 |
- New publication - J. Shimada, M. Shimada, S. Azuma, T. Sugahara, K. Tsunashima, T. Hirai: "Peritectic Phase Behavior of Tetra-n-butylphosphonium Trifluoroacetate Semiclathrate Hydrate", Fluid Phase Equilibria, 567, 113727-1-5 (2023). [DOI] |
| Feb. 28, 2023 | Congratulations! Mr. Shimada won the Prize for Encouragement from the Japan Institute of Energy. He received the award in the ceremony at Tokyo. |
| Jan., 2023 |
- New publication - S. Azuma, J. Shimada, K. Tsunashima, T. Sugahara, T. Hirai: "Effect of Introducing a Cyclobutylmethyl Group to an Onium Cation on the Thermodynamic Properties of Ionic Clathrate Hydrate", New Journal of Chemistry, 47(1), 231-237 (2023). [DOI] |
| Dec. 19-20, 2022 | Mr. Shimada, Mr. Minamikawa, and Dr. Machida (collaborator) gave oral presentations at Ice Science 2022 held at the Hokkaido University. |
| Dec. 10, 2022 | Congratulations! It was decided that Mr. Shimada will get the Prize for Encouragement from the Japan Institute of Energy. The award ceremony will be held at Tokyo on February 28. |
| Nov. 5, 2022 | Many people joined the lab tour at the autumn university festival. Thank you for coming our lab. How about "burning methane hydrate" and "latent heat storage materials"? |
| Oct. 31- Nov. 1, 2022 | Mr. Minamikawa and Dr. Machida (collaborator) gave oral presentations at The 11st Symposium on Latent Heat Engineering(which website was written in Japanese) held at the Hokkaido University. |
| Oct. 25-27, 2022 | Mr. Shimada gave an oral presentation at The 43rd Japan Symposium on Thermophysical Properties(online)(which website was written in Japanese). |
| Oct. 9-13, 2022 | Ms. Azuma (collaborator) gave a poster presentation at 242 nd ECS Meeting, 2022(on line). |
| Oct., 2022 |
- New publication - H. Machida, T. Sugahara, I. Hirasawa: "Supercooling Suppression in the Tetrahydrofuran Clathrate Hydrate Formation", CrystEngComm, 24, 6730-6738 (2022). [DOI] |
| Sep. 14-16, 2022 | Mr. Shimada and Dr. Machida gave oral presentations at SCEJ 53rd Autumn Meeting held at the Shinshu University, Nagano, Japan (hybrid). Congratulations! Mr. Shimada won the Student Best Presentation Award. |
| Sep. 8-9, 2022 | Ms. Azuma (collaborator) gave an oral presentation at ECSJ Fall Meeting, 2022(online)(which website was written in Japanese). |
| August 4-5, 2022 | Mr. Shimada and Mr. Kobatake gave poster and oral presentations at the 31st Annual Meeting of the Japan Institute of Energy held at the Ota City Industrial Plaza (PiO), Tokyo, respectively (hybrid). Dr. Machida (collaborator) also gave an oral presentation there. |
| June 15-16, 2022 | Ms. Azuma (collaborator) gave a poster presentations at 11th JACI/GSC Symposium(which website was written in Japanese)(online). |
| June, 2022 |
- New publication - K. Maeda, M. Moritoki, S. Yae, K. Fukui, N. Fukumoto, T. Sugahara: "Pressure-induced evolution in the durability of nickel-metal hydride batteries under high-current charge", Physical Chemistry Chemical Physics, 24, 14085-14091 (2022). [DOI] |
| June 10, 2022 | Welcome to Mr. Kazushi IKESHITA! He joins our group as an undergraduate student. |
| June, 2022 |
- New publication - S. Azuma, J. Shimada, K. Tsunashima, T. Sugahara, A. Tani, T. Hirai: "Equilibrium Phase Relations and Dissociation Enthalpies of Tri-n-butylalkenylphosphonium Bromide Semiclathrate Hydrates", Journal of Chemical & Engineering Data, 67(6), 1415-1420 (2022). [DOI] |
| April 6, 2022 | Welcome to Mr. Kazuhiro MINAMIKAWA and Mr. Rintaro MIYATAKE! They join our group as Master course students. |
| January, 2022 |
- New publication - J. Shimada, M. Yamada, A. Tani, T. Sugahara, K. Tsunashima, Y. Tuchida, T. Hirai: "Thermodynamic Properties of Tetra-n-butylphosphonium Dicarboxylate Semiclathrate Hydrates", Journal of Chemical & Engineering Data, 67, 67-73 (2022). [DOI] |
| December, 2021 |
- New publication - T. Sugahara, H. Machida: "Hysteresis of Crystallization Derived from Residual Solution Structures after Semiclathrate Hydrate Decomposition", Japanese J. Multiphase Flow, 35(4), 516-524 (2021). [DOI] |
| December 6-7, 2021 | Dr. Machida (collaborator) and Mr. Shimada gave oral presentations at the Ice Science 2021 (online meeting), Japan. |
| Nov. 29-30, 2021 | Dr. Machida (collaborator) gave oral presentations at the 10th Symposium on Latent Heat Engineering held at Kobe University, Japan. |
| Sep. 22-24, 2021 | Mr. J. Shimada gave an oral presentation at the 52nd Autumn Meeting of SCEJ held at Okayama University (online), Japan. Mr. J. Shimada won the Student Good Presentation Award. Congratulations! |
| Sep. 7-9, 2021 | Mr. Shimada and Assistant Prof. Sugahara gave poster presentations at the 9th international symposium on "Molecular Thermodynamics and Molecular Simulation (MTMS '21)" (online meeting), Japan. Mr. J. Shimada won the Student Presentation Award. Congratulations! |
| Sep. 6, 2021 | Welcome to Mr. Rintaro MIYATAKE! He joins our group as an undergraduate. |
| June 18, 2021 |
- New publication - H. Machida, T. Sugahara, I. Hirasawa: "The moment of initial crystallization captured on functionalized nanoparticles", Communications Materials, 2, 66-1-7 (2021). [DOI] The press release (in English) was published on June 28. |
| June. 2021 |
- New publication - J. Shimada, M. Shimada, T. Sugahara, K. Tsunashima, Y. Takaoka, A. Tani: "Phase Equilibrium Temperature and Dissociation Enthalpy in the tri-n-Butylalkylphosphonium Bromide Semiclathrate Hydrate Systems", Chemical Engineering Science, 236, 116514-1-8 (2021). [DOI] |
| April 8, 2021 | Welcome to Mr. Ryosuke Kobatake! He joins our group as a Master course student. |
| April 1, 2021 | Welcome to Mr. Jin Shimada! He joins our group as a PhD student. |
| March 22-24, 2021 | Ms. Azuma (a collaborator, National Institute of Technology, Wakayama College) gave an oral presentation in the 88th ECSJ Meeting. |
| March 20-22, 2021 | Assistant Prof. Sugahara was an organizer of the symposium "K-2: Recent Researches on Gas Hydrates and Supercritical Fluids for Building a Sustainable Society" in honor of Prof. Praveen Linga (National University of Singapore) on "2019 SCEJ Outstanding Asian Researcher and Engineer Award" in the International Chemical Engineering Symposia 2021. Congratulations, Praveen! |
| December 22, 2020 | Mr. Shimada (a collaborator, Kobe Univ.) gave an oral presentation at the Ice Science 2020 (online meeting), Japan. |
| December 9-11, 2020 | Mr. Shimada (a collaborator, Kobe Univ.) gave an oral presentation at the 30th Annual Meeting of MRS-J (online meeting), Japan. Mr. J. Shimada won the Award for Encouragement of Research in the 30th Annual Meeting of MRS-J. Congratulations! |
| September 30, 2020 | A book on the history of gas hydrate researches in Japan was published (ISBN978-4-8190-3210-0). Prof. Sugahara is a co-author. |
| August 7, 2020 | Mr. Shimada (a collaborator, Kobe Univ.) gave an oral presentation at GH researcher meeting (online). |
| April 1, 2020 | Assistant Prof. Sugahara joined in the Environmental Photochemical Engineering Gr. (Prof. Hirai and Associate Prof. Shiraishi Gr.). |
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