Premium
Mathematical Modelling of Cation Contamination in a Proton‐exchange Membrane
Author(s) -
Weber A. Z.,
Delacourt C.
Publication year - 2008
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.200800044
Subject(s) - limiting current , limiting , diffusion , nafion , ion exchange , proton , membrane , chemistry , contamination , ion , steady state (chemistry) , hydrogen , ion transporter , proton exchange membrane fuel cell , thermodynamics , inorganic chemistry , analytical chemistry (journal) , environmental chemistry , electrochemistry , physics , electrode , organic chemistry , mechanical engineering , ecology , biochemistry , quantum mechanics , biology , engineering
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.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom