SELECTIVE HYDROGENATION OF CINNAMALDEHYDE CONTROLLED BY HOST-GUEST INTERACTIONS IN BETA-ZEOLITE

被引：0
|
作者：
GALLEZOT, P [1 ]
BLANC, B [1 ]
BARTHOMEUF, D [1 ]
DASILVA, MIP [1 ]
机构：
[1] UNIV PARIS 06,REACT SURFACE LAB,F-75252 PARIS 5,FRANCE
来源：
ZEOLITES AND RELATED MICROPOROUS MATERIALS: STATE OF THE ART 1994 | 1994年 / 84卷
关键词：
D O I：
暂无
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Large Pt-particles encapsulated in beta zeolite were obtained by direct H-2-reduction of Pt-exchanged zeolite beta. This catalyst gives a high selectivity to unsaturated alcohol in cinnamaldehyde hydrogenation because the geometric constraints in micropores impose an adsorption of the molecule via the C=O group. When the zeolite is calcinated in O-2 before reduction, Pt-clusters of size less than or equal to 1nm are obtained in the micropores. A simultaneous hydrogenation of the C=C and C=O bonds occurs initially on the smaller clusters but the selectivity to unsaturated alcohol increases with time probably as a result of a coalescence of the smaller clusters into clusters filling the open space in the micropores.
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页码：1433 / 1439
页数：7
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