Samenvatting
Ordered mesoporous materials, MCM-41, with varying Si/Al ratios have been synthesised and characterised by adsorption, XRD, NMR, and FTIR measurements. 27Al MAS NMR shows four-fold co-ordination of Al incorporated into the structure. The combined study by microcalorimetry and FTIR, using acetonitrile as probe shows a few strong Lewis sites and only weak Brønsted acidity. The physisorption properties were analysed by N2, n-hexane, benzene, acetonitrile, methanol and water adsorption using microcalorimetry and isotherm measurements. MCM-41 shows adsorption behaviour of a well-defined mesoporous molecular sieve. The heat of adsorption of a non-polar molecule is mainly determined by the pore diameter of the porous material. A characteristic feature of all applied adsorptives is capillary condensation. Whereas isotherms of water are completely irreversible and acetonitrile shows a small hysteresis, isotherms of the non-polar benzene, n-hexane, and nitrogen are completely reversible.
Originele taal-2 | Engels |
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Titel | Progress in zeolite and microporous materials : proceedings of the 11th International Zeolite Conference, Seoul, Korea, August 12-17, 1996 |
Redacteuren | H. Chon |
Plaats van productie | Amsterdam |
Uitgeverij | Elsevier |
Pagina's | 1731-1738 |
ISBN van geprinte versie | 0-444-82344-1 |
DOI's | |
Status | Gepubliceerd - 1996 |
Evenement | 11th International Zeolite conference - Seoul, Noord-Korea Duur: 12 aug. 1996 → 17 aug. 1996 Congresnummer: 11 |
Publicatie series
Naam | Studies in Surface Science and Catalysis |
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Volume | 105 |
ISSN van geprinte versie | 0167-2991 |
Congres
Congres | 11th International Zeolite conference |
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Verkorte titel | IZC |
Land/Regio | Noord-Korea |
Stad | Seoul |
Periode | 12/08/96 → 17/08/96 |
Ander | 11th International Zeolite conference, Seoul, Korea, 12-17-August 1996 |