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Modelling of Pressure-Driven Membrane Separation of Electrolytes: 'High Temperature' Approximation Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal Journal of Membrane Science
ISSN: 0376-7388 , E-ISSN: 1873-3123
Output data Year: 1998, Volume: 142, Number: 2, Pages: 205-212 Pages count : 8 DOI: 10.1016/S0376-7388(97)00320-7
Tags Electrolyte separation, Mathematical modelling, Membrane process
Authors Maryasov Alexander G. 1 , Semin George L. 2
Affiliations
1 Institute of Chemical Kinetics and Combustion, Russian Academy of Sciences, Novosibirsk 630090, Russian Federation
2 Boreskov Institute of Catalysis, Russian Academy of Sciences, Novosibirsk 630090, Russian Federation

Abstract: A model of pressure-driven membrane process of electrolyte separation is presented. The electric field potential assumed as being known, exact solution for permeate composition is readily obtained. All species are assumed to have the same convection velocity. Local electroneutrality condition is not used. The electric potential has been taken into account under high temperature approximation, thus reducing the problem to algebraic equation in exp(Ψ), where Ψ is dimensionless flow potential, and making it possible to calculate concentrations of ions in permeate. Negative retention is shown to be possible for one-component electrolyte solution. For electrolyte mixtures, concentration of ion with high charge is shown to “govern” the membrane selectivity in respect to low-charge ions. Results obtained are in qualitative accordance with the earlier experimental data on membrane separation of reaction mixtures in homogeneous catalysis.
Cite: Maryasov A.G. , Semin G.L.
Modelling of Pressure-Driven Membrane Separation of Electrolytes: 'High Temperature' Approximation
Journal of Membrane Science. 1998. V.142. N2. P.205-212. DOI: 10.1016/S0376-7388(97)00320-7 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Aug 12, 1997
Accepted: Dec 2, 1997
Published print: May 13, 1998
Published online: Jan 6, 1999
Identifiers:
publication_identifier.wos_identifier_type WOS:000073710300006
publication_identifier.scopus_identifier_type 2-s2.0-0032513684
publication_identifier.rinz_identifier_type 13280554
publication_identifier.accession_number_identifier_type 1998:339354
publication_identifier.chemical_accession_number_identifier_type 128:323329
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