Formation and characterization of supported microporous ceramic membranes prepared by sol-gel modification techniques
| Autor: | J.H.A. Hekkink, Klaas Keizer, A.J. Burggraaf, R.S.A. de Lange |
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| Přispěvatelé: | Inorganic Materials Science |
| Rok vydání: | 1995 |
| Předmět: |
Materials science
Chromatography Small-angle X-ray scattering Gas separation Ceramic membranes Filtration and Separation Microporous material Biochemistry Amorphous solid Membrane Chemical engineering Microporous visual_art visual_art.visual_art_medium General Materials Science Sol-gel process Ceramic Physical and Theoretical Chemistry Mesoporous material Sol-gel |
| Zdroj: | Journal of membrane science, 99(1), 57-75. Elsevier |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/0376-7388(94)00206-e |
| Popis: | The formation is described of supported microporous membranes (by IUPAC definition rpore < 1 nm), prepared by modification of mesoporous γ-alumina membranes with polymeric sols. The mesoporous γ-alumina membranes, with a top-layer thickness in the order of 7–10 μm, and with pore radii of 2–2.5 nm, have a very high surface finish (mean roughness 40 nm). The amorphous microporous top-layer thickness is in the order of 60–100 nm. Gas transport properties are effectively improved as is shown by activated permeation and molecular sieve-like separation factors in the order of 50–200 for H2/CH4. These microporous top-layers can be prepared from a relatively wide range of sol structures; from inorganic oligomers which are too small to result in significant scattering with SAXS, to polymeric structures with fractal dimensions in the range: 1 |
| Databáze: | OpenAIRE |
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