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Mass Transport in Ion-Exchange Membranes

Membrane Separation and Transport

  1. Yoshinobu Tanaka

Published Online: 19 APR 2013

DOI: 10.1002/9781118522318.emst019

Encyclopedia of Membrane Science and Technology

Encyclopedia of Membrane Science and Technology

How to Cite

Tanaka, Y. 2013. Mass Transport in Ion-Exchange Membranes. Encyclopedia of Membrane Science and Technology. 1–35.

Author Information

  1. IEM Research, Ushiku-shi, Ibaraki, Japan

Publication History

  1. Published Online: 19 APR 2013

Abstract

Irreversible thermodynamics is the fundamental principle that expresses the mass transport across ion-exchange membranes. The overall mass transport equation is developed with electrodialysis experiments and applied to discuss the performance of an electrodialyzsis process. The computer simulation program is developed using fundamental principles of electrodialysis. Performance of saline water desalination is computed by inputting electrodialyzer specifications and operating conditions. Mechanism of concentration polarization is discussed based on the mass transport across a boundary layer formed on an ion-exchange membrane. Mechanism of the water dissociation reaction is discussed based on electric potential generated by ion-exchange groups in the membrane.

Keywords:

  • ion-exchange membrane electrodialysis;
  • irreversible thermodynamics;
  • mass transport;
  • computer simulation program;
  • saline water desalination;
  • concentration polarization;
  • boundary layer;
  • limiting current density;
  • water dissociation;
  • ion-exchange group