Abstract
Transport phenomena in an ion-exchange membrane containing both and are described using the multicomponent diffusion (extended Stefan–Maxwell) equations. Expressions for macroscopic transport parameters, i.e., conductivity, proton transference number, water electro-osmotic coefficient, and transport parameters characterizing diffusion at zero current, are derived as a function of the binary interaction parameters, , used in the multicomponent transport equations. As experimental data for only four transport properties are available in the literature, the six values cannot be determined in an unequivocal manner. It is in harmony with the data that is large, and linear variations of with are assumed for the other coefficients. Values for the slopes of those linear variations are refined by nonlinear least-square regression on the four experimental transport properties. General governing equations to describe complete transport in the membrane with and are presented, and the model is used with particular boundary conditions to describe the behavior of a membrane used in a electrolyzer. This provides some insights on macroscopic quantities such as the ohmic drop and water transport that are relevant for cell operation.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
