Possibility of cencentration polarization occurring inside the membrane during state pervaporation

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DOIResolve DOI: http://doi.org/10.1080/00986449608936643
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TypeArticle
Journal titleChemical Engineering Communications
Volume154
Issue1
Pages1131; # of pages: 21
AbstractMathematical equations are derived for describing the pervaporation transport of pure penetrant through polymeric membranes by assuming the chemical potential gradient as the driving force for the flow of penetrant. An imaginary phase (liquid or vapor) is assumed to be present and is in thermodynamic equilibrium with the membrane phase for deriving these equations. The mathematical equations obtained are similar to those derived by Okada and Matsuura (1991) using the pore-flow model. The possibility of concentration polarization occurring inside the membrane is predicted based on the analysis of binary mixture pervaporation. Experimental profiles of binary penetrant concentration in the membrane are established and these profiles substantiate the prediction of concentration polarization occurring inside the membrane. Pervaporation and sorption data from liquid and vapor phase at 25°C are reported for the acetic acid-water-polyamide system.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedNo
NRC number37608
NPARC number14317374
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Record identifier2f9f4421-d378-45e4-a85e-0c129068ae19
Record created2010-02-16
Record modified2016-05-09
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