Electroconvection in systems with heterogeneous ion-exchange membranes

Electroconvection in systems with heterogeneous ion-exchange membranes

The features of electroconvection in a smooth rectangular desalting channel of an electrodialysis apparatus with heterogeneous ion-exchange membranes have been theoretically investigated. A 2D model of electroconvection for a binary electrolyte has been constructed for overlimiting current regimes i...

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Bibliographic Details
Published in:Petroleum chemistry Vol. 57; no. 9; pp. 779 - 789
Main Authors: Zabolotsky, V. I., Novak, L., Kovalenko, A. V., Nikonenko, V. V., Urtenov, M. H., Lebedev, K. A., But, A. Yu
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 01-09-2017
Springer
Springer Nature B.V
Subjects:
Chemistry
Chemistry and Materials Science
Computational fluid dynamics
Current voltage characteristics
Desalination
Electrodialysis
Industrial Chemistry/Chemical Engineering
Ion exchange
Mass transfer
Membranes
Morphology
Navier-Stokes equations
Rotating disks
Two dimensional models
limiting current
ion-exchange membrane
surface morphology
modeling
electroconvection
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Summary:The features of electroconvection in a smooth rectangular desalting channel of an electrodialysis apparatus with heterogeneous ion-exchange membranes have been theoretically investigated. A 2D model of electroconvection for a binary electrolyte has been constructed for overlimiting current regimes in the form of the Nernst–Planck–Poisson and Navier–Stokes equations. The influence of surface morphology of the heterogeneous ion-exchange membranes on vortex structures and on mass transfer of salt ions has been studied. The current–voltage characteristic has been calculated for the heterogeneous ion-exchange membranes. It has been shown that mass transfer in the membrane channel can be enhanced by improving the surface morphology of the heterogeneous ion-exchange membranes. The strong-base homogeneous membrane AMX and the modified heterogeneous membrane AMH-M have been studied using the rotating membrane disk technique.
ISSN:0965-5441
1555-6239
DOI:10.1134/S0965544117090109