High-throughput screening of Co-BEA and Co-ZSM-5 coatings in the ammoxidation of ethylene to acetonitrile in a microstructured reactor

被引：16

作者：

Mies, M. J. M. ^{[1
]}

Rebrov, Ex ^{[1
]}

Schiepers, C. J. B. U. ^{[1
]}

de Croon, M. H. J. M. ^{[1
]}

Schouten, J. C. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Dept Chem Engn & Chem, NL-5600 MB Eindhoven, Netherlands

来源：

CHEMICAL ENGINEERING SCIENCE | 2007年 / 62卷 / 18-20期

关键词：

high-throughput screening; microreactor; zeolitic coatings; Co-beta; Co-ZSM-5; ethylene ammoxidation;

D O I：

10.1016/j.ces.2006.12.018

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The activity and selectivity of Co-ZSM-5 and Co-BEA coatings (Si/Al = 15-23) with a thickness of I pm deposited on a Mo substrate were determined in the ammoxidation of ethylene in a microreactor. Zeolite Beta coatings were more than twice as selective towards the acetonitrile formation than ZSM-5 coatings. The rate of acetonitrile formation increased by a factor of 6 by increasing the aluminum content in the coatings from a Si/Al ratio of 23 to 15. The effect of the Co/Al ratio was less pronounced. The addition of small amounts of boron decreased the selectivity to acetonitrile in the whole range of Si/Al ratios studied. A maximum TOF of 0.8 s(-1) was obtained at a reaction temperature of 500 degrees C, with a selectivity of 58% to acetonitrile. The optimized zeolitic coatings show higher reaction rates than a pelletized Co-ZSM-5 catalyst. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：5097 / 5101

页数：5

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