Heterogeneous catalysts for the dehydrogenation of saturated hydrocarbons

被引:14
|
作者
Taubmann, Silke [1 ]
Alt, Helmut G. [1 ]
机构
[1] Univ Bayreuth, Anorgan Chem Lab, D-95440 Bayreuth, Germany
关键词
CH bond activation; heterogeneous catalyst; dehydrogenation; iridium complexes; fixed bed reactor; support materials; additives;
D O I
10.1016/j.molcata.2008.02.023
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
A series of new heterogeneous iridium containing catalysts was synthesized by the incipient wetness method. The used support materials were SiO2, Al2O3, TiO2, ZrO2, and MCM-41. These catalysts are able to dehydrogenate cyclooctane to give cyclooctene and hydrogen without a sacrificing olefin. The catalysts showed TONs up to 1008 in 5 h and selectivities over 90%. The activities, selectivities and stabilities of the catalysts can be increased by addition of suitable support materials and additives. The heterogeneous dehydrogenation reactions showed a high temperature dependence with a temperature maximum depending on the individual coordination compound. The iridium containing catalysts also activated the linear alkanes n-pentane and n-octane in catalytic CH-activation reactions. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:102 / 109
页数:8
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