H2 production from NH3 and O2 over supported transition metal catgalysts triggered by using microwave irradiation

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K18847
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 27:Chemical engineering and related fields
• Research Institution: Nagoya University
• Principal Investigator: Nagaoka Katsutoshi 名古屋大学, 工学研究科, 教授 (90381029)
• Co-Investigator(Kenkyū-buntansha): 佐藤 勝俊 名古屋大学, 工学研究科, 特任准教授 (30586607)
• Project Period (FY): 2021-07-09 – 2023-03-31
• Keywords: アンモニア / 水素製造 / マイクロ波 / 瞬時起動 / 触媒 / グリーン / クリーン / 卑金属

Outline of Final Research Achievements

Ammonia has attracted a lot of attentions as hydrogen carrier. In this research, the catalytic process which enables rapid H2 production by ammonia oxidative decomposition was investigated. We show that H2 production by the reaction is triggered rapidly over Ce0.5Zr0.5O2 supported transition metal catalysts with microwave irradiation. Especially, the microwave irradiation rapidly heats Co3O4/Ce0.5Zr0.5O2 catalyst to auto-ignition temperature of the reaction within 10 s and the reaction starts afterwards. Once the oxidative decomposition of ammonia is triggered, the reaction proceeds without any external heat input. Furthermore, the ammonia oxidative decomposition is triggered over the catalyst repeatedly for 4 cycles with the microwave irradiation. Oxygen is consumed completely and ammonia conversion more than 90 % is obtained at all cycles.

Free Research Field

触媒科学

Academic Significance and Societal Importance of the Research Achievements

本研究の成果はカーボンフリー燃料として期待されているアンモニアと酸素から触媒にマイクロ波を照射するだけで、瞬時に水素を発生できるという斬新なものであり、学術的な意義が大きい。アンモニアは難燃性であるが、水素と混焼すると燃えやすいことが知られており、本研究の成果は燃料アンモニアの利用を拡大するものであり、世界中で利用される可能性を秘めている。その意味で社会的な意義も非常に大きいと言える。