【Peer-reviewed Papers】
| Title | Authors | Journal | Pages | |
|---|---|---|---|---|
 | Prediction of ionic liquid solubilities in supercritical CO2 + co-solvent systems using Peng–Robinson equation of state with accurate critical temperature | Yuya Hiraga, Ikuo Ushiki | Journal of Molecular Liquids, 398 (2024) | 124324 |
 | Synthesis/separation of 5-hydroxymethylfurfural converted from fructose promoted by H2O-CO2 biphasic system with solid catalysts: Experimental and kinetic modeling approaches | Yuya Hiraga, Kosuke Ebina, Yu Su, Masaru Watanabe, Vincent Oriez, Severine Camy | Chemical Engineering Journal, 485 (2024) | 149606 |
 | Predictive distribution coefficient (pKD) model for hops extract fractionation in high-pressure CO2 – ethanol – water solvent systems | Masaki Ota, Yusuke Ueno, Masato Urabe, Aruto Kuwahara, Masaru Watanabe, Richard Lee Smith, Hiroshi Inomata | Fluid Phase Equilibria, 569 (2023) | 113762 |
 | 多段 2 相分配平衡に基づくクロマトグラフの予測モデルの提案 | 大田昌樹, 松田修汰, 平賀佑也, 渡邉賢, 猪股宏 | 化学工学論文集, 49 (5), (2023) | 129-132 |
| 超臨界二酸化炭素を用いたユズ果皮からの天然精油抽出に与える酵素前処理効果の定量評価および抽出残渣の機能性評価 | 平賀佑也, 吉瀬菜南, 鳥居洸太, 戸田雅子, 末吉真由美, 大橋朋貢, 渡邉賢 | 化学工学論文集, 49 (5), (2023) | 133-141 |
 | Catalyst-free synthesis of 5-hydroxymethylfurfural from fructose by extractive reaction in supercritical CO2 – subcritical H2O two-phase system | Vincent Oriez, Hélène Labauze, Bouchra Benjelloun-Mlayah, Thomas Deleau, Yuya Hiraga, Masaru Watanabe, Jean Stéphane Condoret, Séverine Camy | Journal of Supercritical Fluids, 198 (2023) | 105904 |
 | Understanding the reaction behavior of alanine under hydrothermal conditions through a network model | Qingxin Zheng, Keisuke Suzuki, Yuya Hiraga, Masaru Watanabe | Chemical Engineering Journal, 468 (2023) | 143588-143588 |
 | A high-capacity, high-power organic electrode via supercritical CO2 impregnation into activated carbon micropores | Yuta Nakayasu, Shu Sokabe, Yuya Hiraga, Masaru Watanabe | Chemical Communications, 21 (2023) | 3079-3082 |
 | Iron azaphthalocyanine electrocatalysts for enhancing oxygen reduction reactions under neutral conditions and power density in microbial fuel cells | Edwin Osebe Nyangau, Hiroya Abe, Yuta Nakayasu, Masaki Umetsu, Masaru Watanabe, Chika Tada | Bioresource Technology Reports, 23 (2023) | 101565 |
 | Excellent Performance of Glycine in Isolating Mn during Hydrothermal Leaching of LiMn2O4 Cathode Materials | Qingxin Zheng, Seiya Hirama, Akitoshi Nakajima, Tetsufumi Ogawa, Yuta Nakayasu, Zixian Li, Masaru Watanabe | ACS Sustainable Chemistry & Engineering, 11, 35 (2023) | 13033–13042 |
 | Semi-wet methanogen cathode composed of oak white charcoal for developing sustainable microbial fuel cells | Hiroto Nakano, Yuta Nakayasu, Masaki Umetsu, Chika Tada | Journal of Bioscience and Bioengineering, Volume 135, Issue 6 (2023) | 423-500 |
  | Progress on Separation and Hydrothermal Carbonization of Rice Husk Toward Environmental Applications | Hiroya Abe, Yuta Nakayasu, Kazutoshi Haga, Masaru Watanabe | Global Challenges, 7, 8 (2023) | – |
| Total synthesis and antimicrobial evaluation of (+)-hygrophorone B12 and its analogues | Takaaki Kamishima, Masato Suzuki, Koichi Narita, Yoshitaka Koseki, Toshiyuki Nonaka, Hirotaka Nakatsuji, Hideo Hattori, Hitoshi Kasai | Scientific Reports, 12, 7471 (2022) | – | |
 | Production of solid fuels by hydrothermal treatment of wastes of biomass, plastic, and biomass/plastic mixtures: A review | Qingxin Zheng, Zixian Li, Masaru Watanabe | Journal of Bioresources and Bioproducts, 7, 4 (2022) | 221-244 |
 | Metal Recovery of LiCoO2/LiNiO2 Cathode Materials by Hydrothermal Leaching and Precipitation Separation | Akitoshi Nakajima, Qingxin Zheng, Tetsufumi Ogawa, Seiya Hirama, Masaru Watanabe | ACS Sustainable Chem. Eng., 10, 38 (2022) | 12852-12863 |
 | Conversion of 2,5-Bis(hydroxymethyl)furan to Highly Oxidized Cyclopentenones under Catalyst-free Conditions in water | Hirotaka Nakatsuji, Takaaki Kamishima, Toshiyuki Nonaka, Yoshitaka Koseki, Hitoshi Kasai | Chemistry Letters, 51, 5 (2022) | 497-499 |
 | Highly crystalline graphite-like carbon from wood via low-temperature catalytic graphitization | Yuta Nakayasu, Yasuto Goto, Yuto Katsuyama, Takashi Ito, Masaru Watanabe | Carbon Trends, 8, 2022 | – |
 | Bimetallic sulfide ZnMoS4-x/C nanocoral synthesized through glucose-assisted supercritical water system and its high performance for lithium-ion batteries | Ji Zhuang, Mengqi Zhang, Bo Li, He Zhu, Xiangyan Zhao, Qingxin Zheng , Ni Xue, Lei Wang, Yang Liu, Xutang Tao | Electrochimica Acta, 411, 140075 (2022) | – |
 | Extraction of calcium phosphate nanoparticles from cooked bone wastes by supercritical water | Huadong Zhang, Chengye Zhang, Qingxin Zheng, Xi Zeng | Waste and Biomass Valorization, 13 (2022) | 2287-2294 |
 | Advance in low-temperature extraction of natural sources using liquefied dimethyl ether | Qingxin Zheng, Masaru Watanabe | Resource Chemicals and Materials, 1 (2022) | 16-26 |
 | Dimethyl carbonate (DMC) synthesis from methanol and carbon dioxide in the presence of ZrO2 solid solutions and yield improvement by applying a natural convection circulation system | Qingxin Zheng, Ryo Nishimura, Yoshiyuki Sato, Hiroshi Inomata, Masaki Ota, Masaru Watanabe, Séverine Camy | Chemical Engineering Journal, 429, 132378 (2022) | – |
 | Series module of quinone-based organic supercapacitor (> 6 V) with practical cell structure | Yuto Katsuyama, Takayuki Takehi, Shu Sokabe, Mai Tanaka, Mizuki Ishizawa, Hiroya Abe, Masaru Watanabe, Itaru Honma and Yuta Nakayasu | Scientific Reports 12, 3915 (2022) | – |
 | Rapid, one-step fabrication of MoS2electrocatalysts by hydrothermal electrodeposition | Yuta Nakayasu, Hiroaki Kobayashi, Shu suke Katahira, Takaaki Tomai, Itaru Honma | Electrochemistry Communications 132 (2022) | 107180 |
 | Single-Step Recovery of Divalent Mn Component from LiMn2O4 Cathode Material at Hydrothermal Conditions as an Mn–Citrate Complex | Qingxin Zheng, Kensuke Shibazaki, Tetsufumi Ogawa, and Masaru Watanabe | ACS Sustainable Chem. Eng. 2021 | 10970–1097 |
  | Application of hydrothermal leaching technology to spent LIB cathode materials with citric acid using batch-type device and flow system | Qingxin Zheng, Kensuke Shibazaki, Tetsufumi Ogawa, Atsushi Kishita, Yuya Hiraga, Masaru Watanabe | Journal of Chemical Engineering of Japan 54 (2021) | 1-7 |
 | Sulfonated carbon-catalyzed deamination of alanine under hydrothermal conditions | Qingxin Zheng, Takuma Kato, Yuko Ito, Masayoshi Wagatsuma, Yuya Hiraga, Masaru Watanabe | The Journal of Supercritical Fluids 175 (2021) | 105275 |
 | Glycine-assisted hydrothermal leaching of LiCoO2/LiNiO2 cathode materials with high efficiency and negligible acid corrosion employing batch and continuous flow system | Qingxin Zheng, Kensuke Shibazaki, Seiya Hirama, Yuta Iwatate, Atsushi Kishita, Yuya Hiraga, Yuta Nakayasu, Masaru Watanabe | ACS Sustainable Chemistry & Engineering 9 (2021) | 3246-3257 |
 | Behavior and kinetics of drying, pyrolysis, gasification, and combustion tested by a microfluidized bed reaction analyzer for the staged-gasification process | Xi Zeng, Jianling Zhang, Mohammed Haruna Adamu, Fang Wang, Zhennan Han, Qingxin Zheng, Lijuan Zhang, and Guangwen Xu | Energy & Fuels 34 (2020) | 2553-2565 |
 | Mechanism study on green high-efficiency hydrothermal activation of fly ash and its application prospect | Lingjun Ma, Yu Feng, Man Zhang, Qingxin Zheng, Bing Wang, Lina Han, Yuping Li, Liping Chang, Weiren Bao, Jiancheng Wang | Journal of Cleaner Production 275 (2020) | 122977 |
 | Synthesis of unused-wood-derived C-Fe-N catalysts for oxygen reduction reaction by heteroatom doping during hydrothermal carbonisation and subsequent carbonisation in nitrogen atmosphere | Yasuto Goto, Yuta Nakayasu, Hiroya Abe, Yuto Katsuyama, Takashi Ito, Masaru Watanabe | Philosophical Transactions of the Royal Society A | 379 |
 | Rational route for increasing capacity of hard carbons as sodium-ion battery anodes | Yuto Katsuyama, Yuta Nakayasu, Hiroaki Kobayashi, Yasuto Goto, Itaru Honma, Masaru Watanabe | ChemSusChem 13 (2020) | 5762-5768 |
 | Supercritical hydrothermal synthesis of MoS2 nanoshets with controllable layer number and phase structure | Yuki Takahashi, Yuta Nakayasu, Kazuyuki Iwase, Hiroaki Kobayashi, Itaru Honma | Dalton Transactions 49 (2020) | 9377-9384 |
| Hydrothermal leaching of ternary and binary lithium-ion battery cathode materials with citric acid and the kinetic study | Qingxin Zheng, Masaru Watanabe, Yuta Iwatate, Daiki Azuma. Kensuke Shibazaki, Yuya Hiraga, Atsushi Kishita, Yuta Nakayasu | The Journal of Supercritical Fluids 165 (2020) | 104990 |
 | Continuous hydrothermal leaching of LiCoO2 cathode materials by using citric acid | Qingxin Zheng, Kensuke Shibazaki, Tetsufumi Ogawa, Atsushi Kishita, Yuya Hiraga, Yuta Nakayasu, Masaru Watanabe | Reaction Chemistry & Engineering 5 (2020) | 2148-2154 |
 | 実リチウムイオン電池廃棄物に対する水熱法を用いた構成金属の有機酸浸出 | 柴﨑 絢祐, 東 大輝, 渡邉 賢, 木下 睦, 平賀 佑也, 宮崎 秀喜 | 化学工学論文集 46(5) (2020) | 104990 |
 | Defect-Rich Exfoliated MoSe2 Nanosheets by Supercritical Fluid Process as an Attractive Catalyst for Hydrogen Evolution in Water | Quang Duc Truong, Yuta Nakayasu, Quyen T. Nguyen, Duc N. Nguyen, Chuc T. Nguyen, Murukanahally, Kempaiah Devaraju, Dinesh Rangappa, Keiichiro Nayuki, Yoshikazu Sasaki, Phong D. Tra, Takaaki Tomai, Itaru Honma | Applied Surface Science (Accepted) (2020) | |
 | Bottom-up synthesis of graphene via hydrothermal cathodic reduction | Takaaki Tomai, Yuta Nakayasu, Yusuke Okamura, Shunichi Ishiguro, Naoki Tamura, Shusuke Katahira, Itaru Honma | Carbon 158 (2020) | 131 – 136 |
 | Resource upgrading in advanced supercritical fluid (supercritical fluid with catalyst and co-solvent): Liquid fuels from biomass in sub and supercritical water & Carbohydrate up-conversion in ionic liquid and supercritical fluids mixtures | Masaru Watanabe, Masayoshi Wagatsuma, Keisuke Suzuki, Takuma Kato, Yasuto Goto, Yukihiro Kanaguri, Yuya Hiraga | Intech Open | |
 | A precise deconvolution method to derive methane hydrate cage occupancy ratios using Raman spectroscopy | Yuya Hiraga, Takuya Sasagawa, Shinichiro Yamamoto, Hiroyuki Komatsu, Masaki Ota, Takao Tsukada, Richard L. Smith, Jr. | Chemical Engineering Science 214 (2020) | 115361 |
 | クエン酸を用いたコバルト酸リチウムの水熱酸浸出における速度論解析 (2019年度 化学工学会 優秀論文賞) | 東大輝, 相川達也, 平賀佑也, 渡邉賢. | 化学工学論文集. 45(4) (2019) | 147-157 |
 | Hydrogen gas-free processes for single-step preparation of transition-metal bifunctional catalysts and one-pot γ-valerolactone synthesis in supercritical CO2-ionic liquid systems | Haixin Guo, Yuya Hiraga, Xinhua Qi, Richard L. Smith, Jr. | The Journal of Supercritical Fluids, vol. 147 (2019) | 263-27 |
 | Methane clathrate hydrate dissociation analyzed with Raman spectroscopy and a thermodynamic mass transfer model considering cage occupancy | Hiroyuki Komatsu, Takuya Sasagawa, Shinichiro Yamamoto, Yuya Hiraga, Masaki Ota, Takao Tsukada, Richard L. Smith, Jr. | Fluid Phase Equilibria, 489 (2019) | 41-47 |
 | Measurement and modeling of infinite dilution activity coefficients of organic compounds in an equimolar ionic liquid mixture of [Bmim]Cl and [Bmim][Tf2N] | Shida Tomoka, Hiraga Yuya, Sugiyama Takuya, Sato Yoshiyuki, Watanabe Masaru, Smith Richard L. Jr | FLUID PHASE EQUILIBRIA 488 (2019) | 72 – 78 |
 | イオン液体[Bmim]Cl中でのキチンモノマーN-アセチルグルコサミン(GlcNAc)のフラン化合物への転換反応に与えるLewis酸およびBrønsted酸の影響 | 東 大輝, 吉井 孝彰, 渡邉 賢, 平賀 佑也, Smith Jr. Richard L., 尾形 慎, 長田 光正 | 化学工学論文集 45(4) (2019) | 147-157 |
 | N-formyl-stabilizing quasi-catalytic species afford rapid and selective solvent-free amination of biomass-derived feedstocks | Li Hu, Guo Haixin, Su Yaqiong, Hiraga Yuya, Fang Zhen, Hensen Emiel J. M, Watanabe Masaru, Smith Richard Lee J | NATURE COMMUNICATIONS 10(1) (2019) | 1-13 |
 | 水熱とイオン液体を軸とした高圧流体による資源変換に関する基礎的検討 | 平賀 佑也, 渡邉 賢 | 高圧力の科学と技術, 29(3), 206-216 (2019) | 206-216 |
 | Rapid synthesis of defective and composition-controlled metal chalcogenide nanosheets by supercritical hydrothermal processing | Yuta Nakayasu, Siobhan Bradley, Hiroaki Kobayashi, Keiichiro Nayuki, Yoshikazu Sasaki, Takaaki Tomai, Thomas Nann, Itaru Honma | Nanoscale Advances 1(9) (2019) | 3383 – 3387 |
 | Quinone-based Redox Supercapacitor Using Highly Conductive Hard Carbon Derived from Oak Wood (Front Cover) | Yuto Katsuyama, Yuta Nakayasu, Kotaro Oizumi, Yui Fujihara, Hiroaki Kobayashi, Itaru Honma | Advanced Sustainable Systems 3 (2019) | 1900083 |
【International Conferences】
| Title | Authors | Conference | Place | |
|---|---|---|---|---|
| Metal Recovery of LiCoO2/LiNiO2 cathode Materials by Hydrothermal Leaching and Precipitation Separation | Akitoshi Nakajima | 9th International Conference on Engineering for Waste and Biomass Valorisation | Copenhagen, Denmark | |
 | Hydrothermal leaching of commercial and spent lithium-ion battery cathode materials with citric acid employing batch and continuous flow system | Qingxin Zheng, Kensuke Shibazaki, Seiya Hirama, Tetsufumi Ogawa, Akitoshi Nakajima, Yuya Hiraga, Atsushi Kishita, Masaru Watanabe (invited lecture) | 18th European Meeting on Supercritical fluids (2021) | Bordeaux, France |
| 5-Hydroxymethylfurfural production and extraction by solid acid-catalyzed fructose dehydration in supercritical CO2−water two-phase system | Kosuke Ebina, Yuya Hiraga, Hélène Labauze, Séverine Camy, Jean-Stéphane Condoret, Masaru Watanabe | 18th European Meeting on Supercritical fluids (2021) | Bordeaux, France |
 | Rapid fabrication of metallic MoS2 thin film by hydrothermal electrodeposition for electrocatalytic hydrogen evolution reaction | Y. Nakayasu, S. Katahira, H. Kobayashi, I. Honma | 18th Asian Pacific Confederation of Chemical Engineering Congress | Sapporo Japan |
High utilization of Anthraquinone as anode active material of organic redox supercapacitor using wood-derived hard carbon. (Best Oral Presentation Award) | Yuto Katsuyama, Yuta Nakayasu, Kotaro Oizumi, Yui Fujihara, Hiroaki Kobayashi, Itaru Honma | The 3rd ECS Yamagata University Student Chapter Symposium | Yamagata, Japan | |
 | Supercapacitors employing oak-wood-derived porous carbons impregnated with quinones | Yuto Katsuyama, Yuta Nakayasu, Kotaro Oizumi, Yui Fujihara, Hiroaki Kobayashi, Itaru Honma | Organic Battery Days 2019 | Jena, Germany |
【Domestic Conferences】
| Title | Authors | Conference | Place | |
|---|---|---|---|---|
 | 押出機を用いた溶融ポリエチレンと高温高圧水との直接混合処理 | 山口大弥、鄭慶新 | 化学工学会 秋季大会 | 2022.9.15 |
| 酵素前処理ユズ果皮の超臨界CO2抽出による精油回収及び残渣 | 吉瀬菜南、平賀佑也、渡邉賢 | 化学工学会 秋季大会 | 2022.9.15 |
| 超臨界CO2を用いた活性炭細孔内へのキノン類含浸プロセスによる有機電極特性の向上 | 曽我部崇、中安祐太 | 化学工学会 秋季大会 | 2022.9.15 |
| Glycine-assisted hydrothermal leaching of LiCoO2 cathode materials with a continuous flow system (Poster in English) | Seiya Hirama, Qingxin Zheng, Atsushi Kishita, Yuya Hiraga, Yuta Nakayasu, Masaru Watanabe | SCEJ 86th Annual Meeting (2021) | Online |
| 水熱炭化・ヘテロ原子ドープ法を用いた木質由来電極材料の開発 | 後藤泰斗, 中安祐太, 阿部博弥, 勝山湧斗, 伊藤隆, 渡邉賢 | 化学工学会第86回年会 | Online |
 | 木質バイオマス由来炭素材料の電池電極への応用 | 中安祐太 (招待) | 第10回フラーレン・ナノチューブ・グラフェン若手研究会 | Online |
 | Naイオン電池負極脱挿入容量とハードカーボン層間総面積の高相関性 | 勝山湧斗, 中安祐太, 小林弘明, 後藤泰斗, 本間格, 渡邉賢 | 第47回炭素材料学会年会 | Online |
 | 水熱炭化法を用いた木質由来炭化物の酸素還元合成プロセス | 後藤泰斗, 中安祐太, 阿部博弥, 勝山湧斗, 伊藤隆, 渡邉賢 | 第18回木質炭化学会研究発表会 | Online |
| 白炭のNaイオン二次電池負極特性 | 勝山湧斗, 中安祐太, 小林弘明, 後藤泰斗, 本間格, 渡邉賢 | 第18回木質炭化学会研究発表会 | Online |
| 里山発のグリーンデバイス | 中安祐太 (招待) | 第22回先端研究発表会 | Miyagi, Japan |
| 超臨界二酸化炭素-水二相系における5-ヒドロキシメチルフルフラール合成･抽出プロセスに関する基礎的研究 | 蝦名宏祐, 平間聖也, 平賀佑也, 渡邉賢 | 第 22 回先端研究発表会 | Miyagi, Japan |
 | Phase behavior of ionic liquid with biomass-based molecules and hydrogen in the presence of supercritical CO2 for green biomass refinery | Yuya Hiraga | 化学系学協会東北大会 | Yamagata, Japan |
 | 超臨界CO2を用いた使用済み活性炭の再生における活性炭加熱操作の影響 | 後藤 泰斗, 佐藤 義之, 猪股 宏 | 第8回 JACI/GSCシンポジウム2019 | Tokyo, Japan |
| 流通式装置を用いた超臨界二酸化炭素-水間における5-HMFの分配係数測定 | 平間聖也,平賀佑也,渡邉賢 | 第 21 回先端研究発表会 | Miyagi, Japan |
| ナラ白炭を担持材として用いた有機キノンレドックスキャパシタ | 勝山湧斗, 中安祐太, 藤原優衣, 本間格 | 第17回木質炭化学会 | Tokyo, Japan |
| 固体触媒を用いたイオン液体中でのキチンの加水分解 | 小林拓矢, 吉井孝彰, 平賀佑也, 渡邉賢 | 第 21 回先端研究発表会 | Miyagi, Japan |
【Awards】
| 特許/特開 | Title | Authors | Conference | Place |
|---|---|---|---|---|
| 水熱炭化法を用いた木質由来炭化物の酸素還元合成プロセス | 後藤泰斗, 中安祐太, 阿部博弥, 勝山湧斗, 伊藤隆, 渡邉賢 | 第18回木質炭化学会研究発表会 | Online, Japan |
【Patent】
| 特許 | Title | Authors | Number |
|---|---|---|---|
| 特願2020-103916 | 多孔質体、多孔質体の製造方法、電極材料および蓄電装置 | 中安祐太, 本間格, 勝山湧斗 | |
| 特願2021-024718 | 高結晶性炭素の製造方法、その前駆体の製造方法、および前駆体 | 中安祐太, 後藤泰斗, 渡邉賢, 伊藤隆 |
【Other Activities】
| Title | Link | Place | |
|---|---|---|---|
| 2019/8/30 | 東北大学サイエンスカフェにて講演 第167回「超臨界で天然物がお宝に？～新しい食品加工と廃棄物処理技術～」 | クリック | Yamagata, Japan |
| 2019/2/17 | 子供化学実験教室 in 川崎町 | – | Tokyo, Japan |