Experimental evidence of alpha-olefin readsorption in Fischer-Tropsch synthesis on ruthenium-supported ETS-10 titanium silicate catalysts

被引:26
|
作者
Bianchi, CL
Ragaini, V
机构
[1] Department of Physical Chemistry and Electrochemistry, University of Milan, 20133 Milan, Via Golgi
关键词
HYDROCARBON SYNTHESIS; ADSORPTION; POTASSIUM; PATHWAYS; HYDROGEN; RU;
D O I
10.1006/jcat.1997.1572
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
Fischer-Tropsch synthesis seems to develop the following two consecutive paths: a primary process that involves the formation of alpha-olefin products and a secondary process leading to the production of branched isomers and paraffins and requiring the readsorption of primary alpha-olefin products. It was already shown by Iglesia et al. (E. Iglesia, S. C. Reyes, and R. J. Madon, J. Catal. 129, 238 (1991)) that such readsorption steps are of fundamental importance for Ru catalysts and that they occur due to the slow diffusive removal of alpha-olefins when the molecular size increases, this resulting in a long intraparticle residence time. In the present paper alpha-olefins readsorption was enhanced by changing the metal distribution inside the pores of a titanium silicate (ETS-10), modified by ion exchange with alkali metal ions, used as a support for Ru-based catalysts. (C) 1997 Academic Press.
引用
收藏
页码:70 / 74
页数:5
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