Temperature Effect due to Internal Reforming in Pressurized SOFC

For the integration in a hybrid power plant the behavior of pressurized SOFC stacks was examined. A detailed electrochemical model was validated allowing for a thorough interpretation of experimental data. This contribution focuses on the use of reformate gases and the influence of internal reforming. Experimental and simulated current-voltage characteristics and electrochemical impedance spectra were used to examine the temperature differences due to internal reforming which were found to have a major impact on performance. It is shown that similar performance can be obtained for different fuel gas compositions if temperature within the stack is controlled