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Mathematical Modelling of Cation Contamination in a Proton-exchange Membrane

✍ Scribed by A. Z. Weber; C. Delacourt

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
285 KB
Volume
8
Category
Article
ISSN
1615-6846

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✦ Synopsis

Abstract

Transport phenomena in an ion‐exchange membrane containing both H^+^ and K^+^ are described using multicomponent diffusion equations (Stefan–Maxwell). A model is developed for transport through a Nafion 112 membrane in a hydrogen‐pump setup. The model results are analysed to quantify the impact of cation contamination on cell potential. It is shown that limiting current densities can result due to a decrease in proton concentration caused by the build‐up of contaminant ions. An average cation concentration of 30 to 40% is required for appreciable effects to be noticed under typical steady‐state operating conditions.

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