Characterization and permeation properties of binary SiO2-TiO2 and SiO2-Al2O3 modified gamma-alumina membranes

J.H.A. Hekkink*, R.S.A. de Lange, A.A. ten Hoeve, P.J.A.M. Blankenvoorde, K. Keizer, A.J. Burggraaf

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

8 Citations (Scopus)

Abstract

Alumina membranes with a binary top layer consisting of either SiO2-TiO2 or SiO2-Al2O3 were prepared. Adsorption/desorption experiments show that both binary systems are microporous (type I isotherms). The porosity for SiO2-TiO2 is 15% and for SiO2-Al2O3 1-2%. Permeability experiments have been performed on these membranes with H2, CO2 and CH4. For membranes with a SiO2-TiO2 top layer relatively high permeabilities (2.2*10-7 mol/m2.s.Pa at 28°C and 6.7*10-7 mol/m2.s.Pa at 200°C, respectively) were obtained for H2. For CO2 the permeabilities are a factor of 4 lower at 28°C and a factor of 12 lower at 200°C. The permeability of CH4 is a factor of 4 lower at 28°C compared with H2. For SiO2-Al2O3, the permeabilities are a factor of three to four lower than those of SiO2-TiO2 membranes. All gases show an increase in permeability with increasing temperature and thus an activated transport mechanism prevails.

Original languageEnglish
Title of host publicationInorganic Membranes ICIM2-91
Subtitle of host publicationProceedings of the 2nd International Conference on Inorganic Membranes - ICIM2-91
EditorsA.J. Burggraaf, J. Charpin, L. Cot
PublisherTrans Tech Publications Ltd
Pages375-378
Number of pages4
ISBN (Print)0878496254
DOIs
Publication statusPublished - 1 Dec 1991
Event2nd International Conference on Inorganic Membranes, ICIM 1991 - Montpellier, France
Duration: 1 Jul 19914 Jul 1991
Conference number: 2

Publication series

NameKey Engineering Materials
PublisherTrans Tech Publications Ltd
Volume61-62
ISSN (Print)1013-9826

Conference

Conference2nd International Conference on Inorganic Membranes, ICIM 1991
Abbreviated titleICIM
CountryFrance
CityMontpellier
Period1/07/914/07/91

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