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Shape‐Selective Catalysis with Microporous Amorphous Mixed Oxides
Author(s) -
Maier Wilhelm F.,
Martens Johan A.,
Klein Stephan,
Heilmann Jens,
Parton Rudy,
Vercruysse Karen,
Jacobs Pierre A.
Publication year - 1996
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199601801
Subject(s) - microporous material , amorphous solid , catalysis , materials science , chemical engineering , decane , amorphous silica , aluminosilicate , chemistry , crystallography , organic chemistry , composite material , engineering
Ti‐ and V‐containing amorphous glasses with inner surfaces of several hundred m 2 g −1 and pore diameters of 0.7 nm can be prepared by a sol‐gel process. Like zeolites, these amorphous microporous mixed oxides AMM‐M x Si show catalytic shape‐selectivites. The epoxidation of alkenes with tert ‐butylhydroperoxide on Ti‐containing glasses is catalyzed size‐selectively. In the hydrocracking test of decane, these materials show a product distribution that indicates the presence of Brønstedt centers in a shape‐selective environment, as well as tubular pores, the lack of additional cavities, and an effective pore size comparable to those of 10‐ and 12‐ring zeolites.