Abstract

Performance of a solid oxide fuel cell (SOFC) operated with a direct feed of biogas (CH4-CO2 gaseous mixture produced from fermentation of organic matters) was studied. Conversion of CH4 with CO2 into H2/CO gaseous mixture (dry reforming process) can proceed by the catalytic effect of Ni within anode porous volume, so-called direct internal reforming (DIR). The resulting reformate is electrochemically oxidized at the anode/electrolyte interface, generating electricity and heat (electrochemical oxidation process). In this study, a 3D-CFD model for a planar anode-supported cell taking CH4 multiple-reforming into consideration including mass- and heat- transfers and electrochemical processes was established and applied to predict distributions of thermally-induced stress in electrolyte as well as chemical species and temperature.

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