Analysis on Effect of Structural Parameters on SOFC of Methane Internal Reforming
In order to deeply understand the characteristics of methane direct internal reforming SOFC discharge process and to obtain the influence of kinetics and structural parameters on the macroscopic discharge process and performance of the cell,a SOFC process model was established for describing the influence of chemical reactions,electrode reaction coupling momentum,heat,mass and charge transfer in SOFC single cell,and by solving and analyzing the model,it was found that in the SOFC inlet region,methane heat absorption reorganization reaction dominated and diffused from the top side near the cathode to the bottom side in the cathode gas,thus forming a temperature gradient that reduced the air temperature at the bottom of the cathode gas to its lowest value;the increase of porosity improved the electrode diffusion characteristics,thus improving the cell performance;the active surface area is the area where the electrochemical reaction takes place at the electrode-electrolyte interface,and a large surface area encourages more reaction sites,making the reaction rate increase.
Solid oxide fuel cellDirect internal reforming of methaneElectrochemistryProcess modeling
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