On the mechanism of separation of ethanol/water mixtures by pervaporation II. Experimental concentration profiles

M.H.V. Mulder, A.C.M. Franken, C.A. Smolders

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Abstract

Ethanol—water concentration profiles in cellulose acetate membranes were measured under steady-state pervaporation conditions. Knowledge of these profiles leads to a better understanding of the diffusion process during pervaporation. The concentration profiles were determined by a film-stack method, using three to six layers. It is shown that permeation of ethanol—water mixtures proceeds in a coupled way and that crossterm diffusion coefficients need to be considered. Furthermore, the occurrence of sorption resistances at the feed/membrane interface can be established from these experiments
Original languageUndefined
Pages (from-to)41-58
JournalJournal of membrane science
Volume23
Issue number1
DOIs
Publication statusPublished - 1985

Keywords

  • IR-67234

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