論文

• Vinayak Gupta, Hazel Gonzales, Douglas Hungwe, Yamsomphong Kanokwan, Fumitake Takahashi. Understanding global perspectives for the acceptance of community sanitation welfare schemes through a localised qualitative survey in Kho Nagorian, Jaipur, India, Scientific Reports, Springer Nature, Vol. 14, 16002, July 2024.
• Hao Xu, Douglas Hungwe, Pu Yang, Mengzhu Yu, Shuo Cheng, Kunio Yoshikawa, Fumitake Takahashi. Oil sludge addition enables prediction of biomass pyrolysis product profiles by synergistic behaviors between biomass components and oil sludge, Applied Energy, Elsevier, Vol. 362, 123036, May 2024.
• Hao Xu, Shuo Cheng, Douglas Hungwe, Kunio Yoshikawa, Fumitake Takahashi. Co-pyrolysis coupled with torrefaction enhances hydrocarbons production from rice straw and oil sludge: The effect of torrefaction on co-pyrolysis synergistic behaviors, Applied Energy, Elsevier, Vol. 327, 120104, Dec. 2022.
• Patcharanat Kaewmee, Douglas Hungwe, Fumitake Takahashi. Adsorptive reduction of water hardness by highly porous and regenerative geopolymer fabricated from coal fly ash waste with low temperature calcination, Environmental Science and Pollution Research, Springer, Vol. 28, No. 39, pp. 54594-54607, Oct. 2021.
• Hao Xu, Shuo Cheng, Douglas Hungwe, Yueyuan Zhao, Kunio Yoshikawa, Fumitake Takahashi. Co-combustion of oil sludge char with raw/hydrothermally treated biomass: Interactions, kinetics, and mechanism analysis, ACS Omega, American Chemical Society, Vol. 6, No. 38, pp. 24960–24972, Sept. 2021.
• Douglas Hungwe, Saleem Ullah, Petri Kilpelainen, Sarut Theppitak, Lu Ding, Fumitake Takahashi. Potassium demineralization of coconut fiber via combined hydrothermal treatment and washing: Effect on pyrolysis kinetics, mechanisms, and bio-oil composition, Biomass and Bioenergy, Elsevier, Vol. 152, 106194, Sept. 2021.
• Douglas Hungwe, Reza Khoshbouy, Saleem Ullah, Ding Lu, Kunio Yoshikawa, Fumitake Takahashi. Effect of tire-char ash on the extent of synergy during CO2 co-gasification with hydrochar from potassium-rich coconut fiber, Energy & Fuels, American Chemical Society, Vol. 34, No. 7, pp. 8110-8119, July 2020.
• Douglas Hungwe, Lu Ding, Reza Khoshbouy, Kunio Yoshikawa, Fumitake Takahashi. Kinetics and physico-chemical morphology evolution of low and high-ash pyrolytic tyre char during CO2 gasification, Energy and Fuels, American Chemical Society, Vol. 34, No. 1, pp. 118-129, Jan. 2020.

国際会議発表 (査読なし・不明)

• Hao Xu, Pu Yang, Douglas Hungwe, Kunio Yoshikawa, Fumitake Takahashi. Dechlorination of medical waste by combining hydrothermal carbonization and water washing using alkali additives, 2022 Korea-China-Japan Joint Symposium - Clean Energy and Sustainable Environment, Proceedings of the 2022 Korea-China-Japan Joint Symposium - Clean Energy and Sustainable Environment, OS#2-2, Dec. 2022.
• Vinayak Gupta, Hazel B. Gonzales, Douglas Hungwe, Hao Xu, Pu Yang, Fumitake Takahashi. Qualitative survey to gauge the citizens’ intentions to use hydrochar from municipal solid wastes for environmentrelated policymaking and carbon emission abatement in Jaipur, India, 2022 Korea-China-Japan Joint Symposium - Clean Energy and Sustainable Environment, Proceedings of the 2022 Korea-China-Japan Joint Symposium - Clean Energy and Sustainable Environment, PS#2-3, Dec. 2022.
• Hao Xu, Shuo Cheng, Douglas Hungwe, Baskoro Lokahita, Kunio Yoshikawa, Fumitake Takahashi. Co-pyrolysis of oil sludge and torrefied rice straw for hydrocarbon production, 13th International Conference on Applied Energy "ICAE2021", Proceedings of the 13th International Conference on Applied Energy "ICAE2021", 339, Nov. 2021.
• Baskoro Lokahita, Douglas Hungwe, Srikandi Noviant, Xu Hao, Kazuhiro Kawai, Fumitake Takahashi, Kunio Yoshikawa, Ding Lu. Fuel characteristic of hydrothermally treated spent coffee grounds, 2021 China-Japan-Korea-Indonesia Joint Symposium on Energy and Environment,, Proceedings of 2021 China-Japan-Korea-Indonesia Joint Symposium on Energy and Environment, pp. 19-20, Nov. 2021.
• Baskoro Lokahita, Douglas Hungwe, Hao Xu, Srikandi Novianti, Kawai Kazuhiro, Kunio Yoshikawa, Fumitake Takahashi. Improving drying performance of spent coffee ground via hydrothermal pretreatment, 13th International Conference on Applied Energy "ICAE2021", Proceedings of the 13th International Conference on Applied Energy "ICAE2021", 412, Nov. 2021.
• Douglas Hungwe, Fumitake Takahashi. Effect of combined hydrothermal treatment and water washing on coconut fiber demineralization and pyrolysis behaviour, 7th 3R International Scientific Conference on Material Cycles and Waste Management "3RINCs2021", Proceedings of the 7th 3R International Scientific Conference on Material Cycles and Waste Management "3RINCs2021", D-3, Mar. 2021.
• Hao Xu, Douglas Hungwe, Shuo Cheng, Fumitake Takahashi. Effect of hydrothermal treatment on co-combustion interactions and mechanism of oil sludge char with biomass, 7th 3R International Scientific Conference on Material Cycles and Waste Management "3RINCs2021", Proceedings of the 7th 3R International Scientific Conference on Material Cycles and Waste Management "3RINCs2021", D-2, Mar. 2021.
• Reza Khoshbouy, Rico Lejiu, Douglas Hungwe, Fumitake Takahashi, Kunio Yoshikawa. In-situ acid-assisted hydrothermal carbonization of biomass waste: the properties of modified hydrochar and application in the removal of Cd (II), 2019 Japan-China-Korea joint symposium on Energy and Environment, Proceedings of 2019 Japan-China-Korea joint symposium on Energy and Environment, pp. 36, Sept. 2019.

国内会議発表 (査読なし・不明)

• KHOSHBOUY LIGHVAN REZA, LEJIU Rico, HUNGWE Douglas, 高橋 史武, 吉川 邦夫. In-situ acid-assisted hydrothermal carbonization of biowaste: the properties of modified hydrochar and application in the removal of cadmium, 第30回廃棄物資源循環学会研究発表会, 廃棄物資源循環学会研究発表会講演集, 一般社団法人 廃棄物資源循環学会, Vol. 30, pp. 567-568, Sept. 2019.

学位論文

• Effect of inherent mineral content on waste tire char (co) gasification,  Summary,  Doctor (Engineering),  Tokyo Institute of Technology,  2022/03/26,   
• Effect of inherent mineral content on waste tire char (co) gasification,  Exam Summary,  Doctor (Engineering),  Tokyo Institute of Technology,  2022/03/26,   
• Effect of inherent mineral content on waste tire char (co) gasification,  Thesis,  Doctor (Engineering),  Tokyo Institute of Technology,  2022/03/26,   

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