Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 164, Issue 8, Pages H5197-H5201Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0311708jes
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Funding
- China Scholarship Council (CSC)
- StandUp for Energy
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It is important to know the electrode kinetics of hydrogen production as well as to understand the effect of the mass transport in the gas phase for the analysis of the molten carbonate electrolysis cell (MCEC). A one-dimensional model based on the Maxwell-Stefan diffusion equations was applied to predict the mass transfer behavior in gas phase of the porous nickel electrode in the MCEC, combined with equations describing the current distribution in the electrolyte phase. The model gave a fair match to the experimental polarization data of the Ni electrode for varied inlet gas compositions of H2O, CO2 and H-2 between 10 and 40%. The model was also deployed to evaluate the effect of the water-gas shift reaction (WGSR). The fitted kinetic coefficients and electrode porosity differed in the case when including the WGSR compared to when not including the WGSR. In both cases the model was able to well describe the porous nickel electrode behavior in the molten carbonate electrolysis cell. (C) The Author(s) 2017. Published by ECS. All rights reserved.
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