Electrodialysis in aqueous-organic mixtures

Sandra E. Kentish; Elanor Kloester; Geoff W. Stevens; Colin A. Scholes; Ludovic F. Dumée

doi:10.1080/15422119.2014.941111

Electrodialysis in aqueous-organic mixtures

Sandra E. Kentish, Elanor Kloester, Geoff W. Stevens, Colin A. Scholes, Ludovic F. Dumée

Chemical and Petroleum Engineering

University of Melbourne

Research output: Contribution to journal › Review article › peer-review

35 Scopus citations

Abstract

This review investigates the effects of hydro-organic solvents on ion exchange membranes used in conventional electrodialysis. The thermodynamics of electrodialysis is first presented in relation to operation in purely aqueous solutions, where the Donnan potential describes the equilibrium partitioning at the membrane/solvent interface. The mass transfer kinetics through the membrane are described using the Nernst-Planck equation, and concentration polarization describes the mass transfer resistance in the solution boundary layer. Each of these relationships is found to change significantly as the organic concentration in the solvent is increased and the system consequently deviates from ideality. The extent of membrane swelling in these mixed solvents is also critical, as it determines the diffusion coefficient of both ionic and non-ionic species within the membrane structure.

Original language	British English
Pages (from-to)	269-282
Number of pages	14
Journal	Separation and Purification Reviews
Volume	44
Issue number	4
DOIs	https://doi.org/10.1080/15422119.2014.941111
State	Published - 2 Oct 2015

Keywords

diffusion
Electrodialysis
hydro-organic solvents
ion exchange membranes
swelling

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10.1080/15422119.2014.941111

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title = "Electrodialysis in aqueous-organic mixtures",

abstract = "This review investigates the effects of hydro-organic solvents on ion exchange membranes used in conventional electrodialysis. The thermodynamics of electrodialysis is first presented in relation to operation in purely aqueous solutions, where the Donnan potential describes the equilibrium partitioning at the membrane/solvent interface. The mass transfer kinetics through the membrane are described using the Nernst-Planck equation, and concentration polarization describes the mass transfer resistance in the solution boundary layer. Each of these relationships is found to change significantly as the organic concentration in the solvent is increased and the system consequently deviates from ideality. The extent of membrane swelling in these mixed solvents is also critical, as it determines the diffusion coefficient of both ionic and non-ionic species within the membrane structure.",

keywords = "diffusion, Electrodialysis, hydro-organic solvents, ion exchange membranes, swelling",

author = "Kentish, {Sandra E.} and Elanor Kloester and Stevens, {Geoff W.} and Scholes, {Colin A.} and Dum{\'e}e, {Ludovic F.}",

note = "Funding Information: The authors acknowledge financial assistance provided to the CO2CRC by the Australian Government through its CRC program and through Australian National Low Emissions Coal Research and Development (ANLEC R&D). ANLEC R&D is supported by Australian Coal Association Low Emissions Technology Limited and the Australian Government through the Clean Energy Initiative. Publisher Copyright: Copyright {\textcopyright} Taylor & Francis Group, LLC.",

year = "2015",

month = oct,

day = "2",

doi = "10.1080/15422119.2014.941111",

language = "British English",

volume = "44",

pages = "269--282",

journal = "Separation and Purification Reviews",

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T1 - Electrodialysis in aqueous-organic mixtures

AU - Kentish, Sandra E.

AU - Kloester, Elanor

AU - Stevens, Geoff W.

AU - Scholes, Colin A.

AU - Dumée, Ludovic F.

N1 - Funding Information: The authors acknowledge financial assistance provided to the CO2CRC by the Australian Government through its CRC program and through Australian National Low Emissions Coal Research and Development (ANLEC R&D). ANLEC R&D is supported by Australian Coal Association Low Emissions Technology Limited and the Australian Government through the Clean Energy Initiative. Publisher Copyright: Copyright © Taylor & Francis Group, LLC.

PY - 2015/10/2

Y1 - 2015/10/2

N2 - This review investigates the effects of hydro-organic solvents on ion exchange membranes used in conventional electrodialysis. The thermodynamics of electrodialysis is first presented in relation to operation in purely aqueous solutions, where the Donnan potential describes the equilibrium partitioning at the membrane/solvent interface. The mass transfer kinetics through the membrane are described using the Nernst-Planck equation, and concentration polarization describes the mass transfer resistance in the solution boundary layer. Each of these relationships is found to change significantly as the organic concentration in the solvent is increased and the system consequently deviates from ideality. The extent of membrane swelling in these mixed solvents is also critical, as it determines the diffusion coefficient of both ionic and non-ionic species within the membrane structure.

AB - This review investigates the effects of hydro-organic solvents on ion exchange membranes used in conventional electrodialysis. The thermodynamics of electrodialysis is first presented in relation to operation in purely aqueous solutions, where the Donnan potential describes the equilibrium partitioning at the membrane/solvent interface. The mass transfer kinetics through the membrane are described using the Nernst-Planck equation, and concentration polarization describes the mass transfer resistance in the solution boundary layer. Each of these relationships is found to change significantly as the organic concentration in the solvent is increased and the system consequently deviates from ideality. The extent of membrane swelling in these mixed solvents is also critical, as it determines the diffusion coefficient of both ionic and non-ionic species within the membrane structure.

KW - diffusion

KW - Electrodialysis

KW - hydro-organic solvents

KW - ion exchange membranes

KW - swelling

UR - http://www.scopus.com/inward/record.url?scp=84913614318&partnerID=8YFLogxK

U2 - 10.1080/15422119.2014.941111

DO - 10.1080/15422119.2014.941111

M3 - Review article

AN - SCOPUS:84913614318

SN - 1542-2119

VL - 44

SP - 269

EP - 282

JO - Separation and Purification Reviews

JF - Separation and Purification Reviews

IS - 4

ER -

Electrodialysis in aqueous-organic mixtures

Abstract

Keywords

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