Polarization phenomena at the interfaces between an electrolyte solution and an ion exchange membrane. Part I. Ion transfer with a cation exchange membrane


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Output type: Journal article

UM6P affiliated Publication?: No

Author list: Taky M., Pourcelly G., Lebon F., Gavach C.

Publication year: 1992

Journal: Journal of Electroanalytical Chemistry (0022-0728)

Volume number: 336

Issue number: 1-2

Start page: 171

End page: 194

Number of pages: 24

ISSN: 0022-0728

URL: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0001654688&origin=inward


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Abstract

Polarization phenomena occurring with ion exchange membranes have been investigated for the Selemion CMV cation exchange membrane in contact with NACl solutions. The influence of the electrolyte concentration on the value of the limiting current density has been studied under constant hydrodynamic conditions. Ion flux measurements with radiotracers show that all the current is carried by the Na+ counterions, even above the limiting current value. On the basis of Nernst-Planck electrodiffusion equations coupled with the Poisson equation, the concentration and the potential profiles are determined within the two unstirred layers on both sides of the membrane under limiting current density. Finally, the different overvoltages are evaluated and the experimental values of the concentration overvoltages are compared to the calculated values. © 1992.


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Last updated on 2021-21-10 at 23:16