Solid oxide fuel cells with direct internal reforming of ammonia-methane mixed fuel

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K18689
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 19:Fluid engineering, thermal engineering, and related fields
• Research Institution: Kyoto University
• Principal Investigator: Iwai Hiroshi 京都大学, 工学研究科, 教授 (00314229)
• Project Period (FY): 2021-07-09 – 2024-03-31
• Keywords: 改質 / 混合燃料 / 固体酸化物形燃料電池 / 燃料極 / 実験

Outline of Final Research Achievements

The feasibility of a new operation method for solid oxide fuel cells, in which a mixture of ammonia and methane gas is directly supplied as fuel, was experimentally clarified. This could be a new method to manage the temperature distribution in the cell as well as to make effective use of the excess heat generated from the electrochemical reactions. It was found that the ammonia decomposition reaction proceeds preferentially over the methane steam reforming reaction in the mixed gas, and the oxidation reaction of the produced hydrogen proceeds as the main reaction of the electrochemical reaction.

Free Research Field

熱工学

Academic Significance and Societal Importance of the Research Achievements

本研究を通じて、アンモニア-メタン混合燃料を用いることによる新たなセル温度制御手法の実現性を示すとともに、セル性能予測に必用な混合燃料供給時の起電力のの簡易予測手法を確立した。さらに小型セルによる実験により、発電性能の基礎特性を取得することができた。アンモニアとメタンの組み合わせに限らず、広く混合ガス燃料を直接供給するSOFCの理解が進むことが期待される。