Formation of acid sites in amorphous silica-alumina

E. J. M. Hensen,D. G. Poduval,P. C. M. M. Magusin,A. E. Coumans,J. A. R. van Veen

Journal of Catalysis（2010）

引用 162|浏览13

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摘要

Well-defined precursors to amorphous silica-alumina are prepared through the grafting of aluminium to silica via hydrolytic adsorption. Calcination results in two competing processes, namely the diffusion of aluminium into the silica network to give the desired Brønsted acidity and the surface aggregation into small domains of aluminium oxide.

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关键词

Amorphous silica-alumina,Acidity,Preparation,Deposition-precipitation

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