Modeling of The Solid Oxide Fuel Cell Considering H2 and CO Electrochemical Reactions

this study presented a competitive electrochemical mechanism of the hydrogen and carbon monoxide to describe the real electrochemical reactions in SOFC. The SOFC models employed the competitive electrochemical mechanism was validated with a variety of fuels as the feedstocks, such as methane, mixing gas of H2 and CO, blast furnace gas (BFG), and coke oven gas (COG), via pilot-scale SOFC modules of 1 kW and 50 kW. The models were implemented on Aspen Custom Modeler platform to simulate steady-state results. Further, the SOFC of the 50 kW pilot simulation considering the whole pilot process including pre-reformers, heat exchangers, and fuel recycling. The results showed the SOFC employed the competitive electrochemical mechanism has the better performances of the power generation and voltage predictions regardless of the what fuel used in SOFC of the 1 kW scale, compared to the SOFC only employed hydrogen electrochemical mechanism. The mean voltage error of the SOFC with the competitive electrochemical mechanism using various fuels was 1.52%. the minimum error was 0.73% using COG as the feedstock. The validation of the SOFC model of the 50 kW scale showed that only a 5% error with the experiment in steady-state and 6.91% error in transition.