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Hydrophobic pervaporation of binary and ternary solutions : Evaluation of fluxes, selectivities, and coupling effects

Lipnizki, Frank LU and Hausmanns, Stephan (2004) In Separation Science and Technology 39(10). p.2235-2259
Abstract

In hydrophobic pervaporation, the evaluation and prediction of coupling effects in multicomponent systems is one of the key requirements to improve its applicability in the biotechnology and food industry. The focus of this study is first on binary aqueous systems with methanol, ethanol, acetone, 1-propanol, 2-propanol 1,3-dioxane, and 1,4-dioxane, and then on ternary aqueous systems with 1-propanol and a second organic/aromatic component. The pervaporation experiments were carried out with polydimethyl siloxane (PDMS)-zeolite Pervap 1070 membranes. From the binary experiments, it was found that for a homologous series of alcohols, flux and selectivity are increasing with liquid molar volume and activity coefficients. Dipole moments... (More)

In hydrophobic pervaporation, the evaluation and prediction of coupling effects in multicomponent systems is one of the key requirements to improve its applicability in the biotechnology and food industry. The focus of this study is first on binary aqueous systems with methanol, ethanol, acetone, 1-propanol, 2-propanol 1,3-dioxane, and 1,4-dioxane, and then on ternary aqueous systems with 1-propanol and a second organic/aromatic component. The pervaporation experiments were carried out with polydimethyl siloxane (PDMS)-zeolite Pervap 1070 membranes. From the binary experiments, it was found that for a homologous series of alcohols, flux and selectivity are increasing with liquid molar volume and activity coefficients. Dipole moments were identified as additional parameters to consider in the case of isomers. The experiments with ternary aqueous solutions revealed that the effect of coupling increases with the organic concentration. Furthermore, by introducing a coupling factor as a ratio of ternary and binary component permeability, it was found that the effect of coupling increases with decreasing molecular weight and reaches a maximum at the equimolar point of first and second organic components in the feed. This trend was similar for all organic/aromatic components considered in this study and gained further confirmation by using literature values.

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author
publishing date
type
Contribution to journal
publication status
published
keywords
Aqueous solutions, Coupling, Pervaporation, Solution-diffusion
in
Separation Science and Technology
volume
39
issue
10
pages
25 pages
publisher
Marcel Dekker
external identifiers
  • scopus:3843149416
ISSN
0149-6395
DOI
10.1081/SS-120039309
language
English
LU publication?
no
id
7c115458-4f21-4d15-8cab-a25fb99c47c3
date added to LUP
2017-01-23 13:47:47
date last changed
2017-09-10 05:14:34
@article{7c115458-4f21-4d15-8cab-a25fb99c47c3,
  abstract     = {<p>In hydrophobic pervaporation, the evaluation and prediction of coupling effects in multicomponent systems is one of the key requirements to improve its applicability in the biotechnology and food industry. The focus of this study is first on binary aqueous systems with methanol, ethanol, acetone, 1-propanol, 2-propanol 1,3-dioxane, and 1,4-dioxane, and then on ternary aqueous systems with 1-propanol and a second organic/aromatic component. The pervaporation experiments were carried out with polydimethyl siloxane (PDMS)-zeolite Pervap 1070 membranes. From the binary experiments, it was found that for a homologous series of alcohols, flux and selectivity are increasing with liquid molar volume and activity coefficients. Dipole moments were identified as additional parameters to consider in the case of isomers. The experiments with ternary aqueous solutions revealed that the effect of coupling increases with the organic concentration. Furthermore, by introducing a coupling factor as a ratio of ternary and binary component permeability, it was found that the effect of coupling increases with decreasing molecular weight and reaches a maximum at the equimolar point of first and second organic components in the feed. This trend was similar for all organic/aromatic components considered in this study and gained further confirmation by using literature values.</p>},
  author       = {Lipnizki, Frank and Hausmanns, Stephan},
  issn         = {0149-6395},
  keyword      = {Aqueous solutions,Coupling,Pervaporation,Solution-diffusion},
  language     = {eng},
  number       = {10},
  pages        = {2235--2259},
  publisher    = {Marcel Dekker},
  series       = {Separation Science and Technology},
  title        = {Hydrophobic pervaporation of binary and ternary solutions : Evaluation of fluxes, selectivities, and coupling effects},
  url          = {http://dx.doi.org/10.1081/SS-120039309},
  volume       = {39},
  year         = {2004},
}