Abstract
A one-dimensional transient elementary reaction kinetic model of an anode supported solid oxide fuel cell (SOFC) fueled with syngas is developed considering the carbon deposition effect. This model incorporates the coupling effect of heterogeneous elementary chemical and electrochemical reactions, the electrode microstructure and the charge and mass transport processes. The degradation process of the Ni/YSZ anode is considered by a carbon formation mechanism. The model is validated by experimental electrochemical impedance spectra and the simulation results agree reasonably well with the experimental data. The numerical results of carbon deposition simulation indicate that the fuel cell performance and the degradation progress are influenced significantly by the operation temperature and gas compositions. The surface carbon deposition can be decreased by increasing the operating temperature. And the degradation effect can be lessened by reducing carbon dioxide, methane or carbon monoxide in the fuel.
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