Electrochemistry and On‐Cell Reformation Modeling for Solid Oxide Fuel Cell Stacks

摘要: ABSTRACT Providing adequate and efficient cooling schemes for solid-oxide-fuel-cell (SOFC) stacks continues to be a challenge coincident with the development of larger, more powerful stacks. The endothermic steam-methane reformation reaction can provide improved system efficiency when performed directly on electrochemically active anode. Rapid kinetics typically causes localized temperature depression anode near fuel inlet. It is desirable extend effect over cell area mitigate associated differences in alleviate subsequent thermal stresses. In this study, modeling tools validated prediction use, on-cell methane reforming, distribution within SOFC stacks, are employed direction modifying catalytic activity materials control conversion rate. Improvements management that achieved through reforming predicted discussed. Two operating scenarios considered: one which fully pre-reformed, another substantial percentage reformed on-cell. For latter, range considered effects presented. Simulations themore » electrochemical performance without including structural analyses, show decrease stresses an case slowed conversion.« less