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Analytic modeling of polarizations in a solid oxide fuel cell using a biomass syngas product as a fuel


Autore: A. Thameur, K. Halouani

Collana: BT - 34 - Mag 06 - Energy: production, distribution and conservation

An analytical model is developed to study fuel type effect on polarizations and performance of SOFC. We consider especially two types of fuel: pure hydrogen and syngas produced by biomass gasification. The model is based on direct electrochemical oxidation of H2 and CO at the anode side and uses the dusty-gas model with appropriate diffusion coefficient to evaluate the concentration polarization and the Butler-Volmer equation to calculate the activation polarization when ohmic polarization is expressed by the well known Ohmís law. Results analysis shows, that a fraction of CO of about 24% in syngas improves the performance of SOFC by 23% compared to that obtained by pure H2.

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