Steady state sorption measurement and the transport mechanism in polymeric membrane during vapor permeation

For more realistic description of vapor permeation through polymeric membrane it is desirable to replace the experimentally readily accessible data on the permeate equilibrium sorption with a difficult to obtain information on the actually sorbed amount at the steady state operation of the process....

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Bibliographic Details
Published inJournal of membrane science Vol. 275; no. 1; pp. 166 - 174
Main Authors Fialová, Kateřina, Petrychkovych, Roman, Sharma, Meena, Uchytil, Petr
Format Journal Article
LanguageEnglish
Published Elsevier B.V 20.04.2006
Subjects
Diffusion coefficient
Flux
Pervaporation
Sorption
Vapor permeation
Sorption
Flux
Vapor permeation
Diffusion coefficient
Pervaporation
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Summary:For more realistic description of vapor permeation through polymeric membrane it is desirable to replace the experimentally readily accessible data on the permeate equilibrium sorption with a difficult to obtain information on the actually sorbed amount at the steady state operation of the process. For this purpose, we designed a new apparatus making possible performing permeation and steady state sorption experiments practically simultaneously. This novel experimental approach was tested in a study of propan-1-ol transport through a low-density polyethylene (LDPE) membrane in a range of experimental conditions (membrane thickness, feed concentration, temperature). Fluxes calculated using Fick's first law equation from the evaluated transport parameters (diffusivity and concentration gradient) agreed very favorably with the experimental flux values.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2005.09.015