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The influence of support layer on mass transport of homologous series of alcohols and esters through composite pervaporation membranes

Trifunovic, Olivera LU and Trägårdh, Gun LU (2005) In Journal of Membrane Science 259(1-2). p.122-134
Abstract
In this study the effect of the composite membrane structure on the mass transfer limitations in hydrophobic pervaporation of dilute aqueous solutions of homologous series of alcohols and esters was investigated. Three hydrophobic membranes with poly (octyl)methylsiloxane (POMS) as an active layer were used. The membranes studied varied with respect to the thickness of the active layer and the nature and geometric characteristics of the support layer: polyetherimide (PEI) or polyacrylonitrile (PAN). The transport through the support was modelled by Knudsen diffusion. While the support layer had a moderate effect on mass transfer resistance for homologous series of esters, for the homologous series of alcohols the effects of the support... (More)
In this study the effect of the composite membrane structure on the mass transfer limitations in hydrophobic pervaporation of dilute aqueous solutions of homologous series of alcohols and esters was investigated. Three hydrophobic membranes with poly (octyl)methylsiloxane (POMS) as an active layer were used. The membranes studied varied with respect to the thickness of the active layer and the nature and geometric characteristics of the support layer: polyetherimide (PEI) or polyacrylonitrile (PAN). The transport through the support was modelled by Knudsen diffusion. While the support layer had a moderate effect on mass transfer resistance for homologous series of esters, for the homologous series of alcohols the effects of the support layer depended not only on the geometric characteristics of the support structure, but also on the nature of the support: the membrane with the PEI support exhibited a greater reduction in driving force than membranes with the PAN support. However, regarding selectivity towards the feed mixture the membrane with the PEI support was superior, due to the correct proportions between the thickness of the active layer and the support layer. Further improvement in membrane performance can be obtained by optimizing the geometric characteristics of this support structure in order to minimize the reduction in driving force of pressure-sensitive compounds. (c) 2005 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Membrane Science
volume
259
issue
1-2
pages
122 - 134
publisher
Elsevier
external identifiers
  • wos:000230884100013
  • scopus:21844455513
ISSN
0376-7388
DOI
10.1016/j.memsci.2005.03.011
language
English
LU publication?
yes
id
296d7664-aaba-4d73-8b43-4169bc5e9d07 (old id 152033)
date added to LUP
2007-07-19 11:15:38
date last changed
2017-08-06 04:40:19
@article{296d7664-aaba-4d73-8b43-4169bc5e9d07,
  abstract     = {In this study the effect of the composite membrane structure on the mass transfer limitations in hydrophobic pervaporation of dilute aqueous solutions of homologous series of alcohols and esters was investigated. Three hydrophobic membranes with poly (octyl)methylsiloxane (POMS) as an active layer were used. The membranes studied varied with respect to the thickness of the active layer and the nature and geometric characteristics of the support layer: polyetherimide (PEI) or polyacrylonitrile (PAN). The transport through the support was modelled by Knudsen diffusion. While the support layer had a moderate effect on mass transfer resistance for homologous series of esters, for the homologous series of alcohols the effects of the support layer depended not only on the geometric characteristics of the support structure, but also on the nature of the support: the membrane with the PEI support exhibited a greater reduction in driving force than membranes with the PAN support. However, regarding selectivity towards the feed mixture the membrane with the PEI support was superior, due to the correct proportions between the thickness of the active layer and the support layer. Further improvement in membrane performance can be obtained by optimizing the geometric characteristics of this support structure in order to minimize the reduction in driving force of pressure-sensitive compounds. (c) 2005 Elsevier B.V. All rights reserved.},
  author       = {Trifunovic, Olivera and Trägårdh, Gun},
  issn         = {0376-7388},
  language     = {eng},
  number       = {1-2},
  pages        = {122--134},
  publisher    = {Elsevier},
  series       = {Journal of Membrane Science},
  title        = {The influence of support layer on mass transport of homologous series of alcohols and esters through composite pervaporation membranes},
  url          = {http://dx.doi.org/10.1016/j.memsci.2005.03.011},
  volume       = {259},
  year         = {2005},
}