Synthesis, characterisation and gas permeation studies on microporous silica and alumina-silica membranes for separation of propane and propylene

Balagopal N. Nair, Klaas Keizer, Wilma J. Elferink, Melis J. Gilde, Henk Verweij, Anthonie J. Burggraaf

Research output: Contribution to journalArticleAcademicpeer-review

44 Citations (Scopus)
104 Downloads (Pure)

Abstract

Microporous silica membranes are known to exhibit molecular sieving effects. However, separation of nearly equal sized molecules is difficult to carry out by size exclusion. Introducing sorption selectivity and keeping the kinetics favourable to facilitate a good contribution of permeation from sorption is a possible solution to enhance selectivity of adsorbing molecules. Results are presented in this paper on the synthesis of a microporous silica membrane with commendable permselectivity between helium and propylene. Modifications are performed on the membrane to improve its almost non-selective nature to propylene/propane mixtures to give practical separation values. Gas separation results on the modified membranes are presented. Surface selectivity on the newly added alumina surface layer is identified as the helping mechanism in realising this separation.
Original languageEnglish
Pages (from-to)161-169
Number of pages9
JournalJournal of membrane science
Volume116
Issue number2
DOIs
Publication statusPublished - 1996

Fingerprint

Dive into the research topics of 'Synthesis, characterisation and gas permeation studies on microporous silica and alumina-silica membranes for separation of propane and propylene'. Together they form a unique fingerprint.

Cite this