Zeolite A-Supported Ru Catalysts
Resource
Journal of Catalysis, v.125, p.488-500
Journal
Journal of Catalysis
Journal Volume
v.125
Pages
488-500
Date Issued
1988
Date
1988
Author(s)
Abstract
A series of zeolite A-supported Ru catalysts was investigated to determine the catalytic possibilities when Ru is supported on such small-pore, low Si/Al ratio zeolites. Catalysts prepared by adding a Ru precursor to the zeolite A synthesis gel, designated [ZS], had metal dispersed intrazeolitically, although not uniformly. By comparison, catalysts prepared by surface deposition of Ru on zeolite A, designated [SD], had metal particles primarily on the external surfaces of the zeolite crystallites. All metal sites were accessible for ethane hydrogenolysis; however, molecular sieving strongly influenced cyclopropane hydrogenation. With the exception of the strong molecular sieving effect on the reaction of cyclopropane found for RuNaA[ZS], the most important effect on the catalytic properties was Ru particle size. There was no obvious effect of the method of preparation or the electrostatic field of the zeolite on Ru site activity. The synthesis preparation method was found to offer a viable means for preparing highly dispersed, catalytically active metal particles inside a small-pore zeolite such as A, where other methods are not successful. © 1990.
Type
journal article