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Journal of Applied Electrochemistry

, Volume 30, Issue 7, pp 809–816 | Cite as

A new technique for the visualization of the concentration boundary layer in an electrodialysis cell

  • V. Pérez-Herranz
  • J.L. Guiñón
  • J. García-Antón
Article

Abstract

A new method for the visualization of the concentration boundary layer is described. The technique involves the use of a dilute solution of an indicator which reacts with H+ formed on the membrane surface to form a coloured trace when the electrodialysis cell is operating above the limiting current density. The thickness of the concentration boundary layer determined by the visualization method agrees well with results obtained from limiting current density measurements and theoretical predictions. The visualization method proposed in this work can be used for understanding the transport taking place between a solid wall and a liquid in steady and unsteady flow processes.

concentration boundary layer electrodialysis flow visualization 

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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • V. Pérez-Herranz
    • 1
  • J.L. Guiñón
    • 1
  • J. García-Antón
    • 1
  1. 1.Departamento de Ingeniería Química y Nuclear, E.T.S.I. IndustrialesUniversidad Politécnica de ValenciaValenciaSpain

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