Abstract
The preparation and characterization of porous ceramic membranes is presented. These membranes consist of a macroporous support system, with or without a mesoporous intermediate layer, and a microporous top layer. For the macroporous support membranes two manufacturing routes are described: a conventional and a RBAO (Reaction Bonded Aluminium Oxide) route. The mesoporous γ-Al2O3 layer is obtained by means of a sol-gel dipcoating technique. Three microporous top layers are considered: SiO2, Al2O3-pillared montmorillonite and Laponite. These top layers have different pore structures which results in different gas transport properties. A SiO2 membrane can be used for H2 removal from a gas mixture. Al2O3-pillared montmorillonite and Laponite membranes do not show specific gas separation properties. Dehydration of water/2-propanol mixtures by means of pervaporation also proved a different behavior for these microporous membranes.
Original language | English |
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Pages (from-to) | 241-248 |
Number of pages | 8 |
Journal | Journal of porous materials |
Volume | 5 |
DOIs | |
Publication status | Published - 2000 |
Externally published | Yes |
Keywords
- Porous membranes
- SiO2
- Al2O3-pillared montmorillonite
- Laponite
- Gas separation
- Pervaporation