Separation of a toluene/ethanol mixture by pervaporation using active carbon-filled polymeric membranes

J.-M. Duval, B. Folkers, M.H.V. Mulder, G. Desgrandchamps, C.A. Smolders

Research output: Contribution to journalArticleAcademicpeer-review

33 Citations (Scopus)

Abstract

In order to improve the separation properties of dense polymeric membranes toward a toluene/ethanol mixture, various active carbons and two types of zeolites were introduced into a thin polymeric film in order to form a heterogeneous membrane composed of solid particles surrounded by a polymer phase. Active carbons show a high adsorption selectivity for an aromatic compound over ethanol in the low concentration range of the aromatic component. Sorption and pervaporation experiments were carried out with a toluene/ethanol mixture, and they showed no improvement in selectivity and a decrease in flux for membranes filled with active carbons. For zeolite-filled membranes, both selectivity and flux decreased. A permeability model derived for heterogeneous systems was used. It confirmed that the carbon particles have a closed porous structure, allowing no transport from one side to the other, and that the zeolites have an ethanol selective permeation behavior.
Original languageEnglish
Pages (from-to)357-373
Number of pages17
JournalSeparation Science and Technology (Philadelphia)
Volume29
Issue number3
DOIs
Publication statusPublished - 1994

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