Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
A one-dimensional steady-state numerical analysis for the anode support layer of a direct ammonia-supplied solid oxide fuel cell is conducted to elucidate the effects of the ammonia decomposition reaction rate, the electrochemical reaction rate, and the inlet molar fraction on the gas transport within the support layer. The ammonia decomposition reaction is most active in the vicinity of the anode surface and its reaction rate decreases monotonically with distance from the surface. The gas partial pressure distribution in the support layer is affected by the ammonia decomposition reaction rate, electrochemical reaction rate, and differences in gas diffusivities. The total pressure gradient is larger when the anode is supplied with pure ammonia compared to pure hydrogen, highlighting the influence of the ammonia decomposition reaction. Additionally, hydrogen is found to flow out from the anode surface when the hydrogen production from the ammonia decomposition reaction exceeds its consumption by the electrochemical reaction.
