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 language | English |
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Title of host publication | Inorganic Membranes ICIM2-91 |
Subtitle of host publication | Proceedings of the 2nd International Conference on Inorganic Membranes - ICIM2-91 |
Editors | A.J. Burggraaf, J. Charpin, L. Cot |
Publisher | Trans Tech Publications Ltd |
Pages | 375-378 |
Number of pages | 4 |
ISBN (Print) | 0878496254 |
DOIs | |
Publication status | Published - 1 Dec 1991 |
Event | 2nd International Conference on Inorganic Membranes, ICIM 1991 - Montpellier, France Duration: 1 Jul 1991 → 4 Jul 1991 Conference number: 2 |
Publication series
Name | Key Engineering Materials |
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Publisher | Trans Tech Publications Ltd |
Volume | 61-62 |
ISSN (Print) | 1013-9826 |
Conference
Conference | 2nd International Conference on Inorganic Membranes, ICIM 1991 |
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Abbreviated title | ICIM |
Country/Territory | France |
City | Montpellier |
Period | 1/07/91 → 4/07/91 |