New perspectives on basic zeolites as catalysts and catalyst supports

被引:178
|
作者
Davis, RJ [1 ]
机构
[1] Univ Virginia, Dept Chem Engn, Charlottesville, VA 22904 USA
关键词
faujasite; zeolite X; cesium; sodium; potassium; alkylation; isomerization; cyclo-addition of carbon dioxide; ammonia synthesis; iodine; adsorption of; carbon dioxide;
D O I
10.1016/S0021-9517(02)00034-9
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
Zeolites are aluminosilicate molecular sieves that have great potential as basic catalysts and catalyst supports. In particular, this paper discusses recent work and future directions with zeolite X containing exchanged alkali metal cations, occluded alkali metal oxides, and occluded alkali metals. Probe reactions such as alkylation of toluene with methanol, cyclo-addition of carbon dioxide to ethylene oxide, isomerization of I-butene, and alkylation of toluene with ethylene are catalyzed by the basic X zeolites, depending on the preparation method. Basic zeolites are also excellent supports for nanometer-sized Ru metal clusters used to catalyze the ammonia synthesis reaction. In that case, occluded barium oxide effectively promotes the reaction on Ru-loaded Ba-exchanged zeolite X. These examples illustrate important principles that can be used to guide future design of shape-selective base catalysts. (C) 2003 Elsevier Science (USA). All rights reserved.
引用
收藏
页码:396 / 405
页数:10
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