Implementation of multi-component dusty-gas model for species transport in quasi-three-dimensional numerical analysis of solid oxide fuel cell. Part II: direct ammonia fuel

Abstract

The Fick’s model is applied to analyze the species transport in the porous electrodes for an in-house developed quasi-three-dimensional numerical model of solid oxide fuel cell. It may not be reliable when significant concentration difference is formed in the gas mixture, owing to chemical reactions such as steam methane reforming and ammonia decomposition. In this study, the multi-component dusty-gas model is implemented to solve the conservation of species on a three-dimensional grid system in the anode layer involving direct ammonia decomposition. The results with the developed model are compared with the available two-dimensional numerical analysis. The obtained results show that the dusty-gas model can accurately predict the transport of gas species in the porous anode even when a chemical reaction occurs.