CATALYTIC AND STRUCTURAL-PROPERTIES OF RUTHENIUM BIMETALLIC CATALYSTS- EFFECTS OF PRETREATMENT ON THE BEHAVIOR OF VARIOUS RU AL2O3 CATALYSTS IN ALKANE HYDROGENOLYSIS/

Authors
Citation
Gc. Bond et Jc. Slaa, CATALYTIC AND STRUCTURAL-PROPERTIES OF RUTHENIUM BIMETALLIC CATALYSTS- EFFECTS OF PRETREATMENT ON THE BEHAVIOR OF VARIOUS RU AL2O3 CATALYSTS IN ALKANE HYDROGENOLYSIS/, Journal of molecular catalysis. A, Chemical, 96(2), 1995, pp. 163-173
Citations number
21
Categorie Soggetti
Chemistry Physical
ISSN journal
13811169
Volume
96
Issue
2
Year of publication
1995
Pages
163 - 173
Database
ISI
SICI code
1381-1169(1995)96:2<163:CASORB>2.0.ZU;2-Z
Abstract
Very highly dispersed 1% Ru/Al2O3 prepared from Ru(acac)(3), after hig h-temperature reduction, catalyses the hydrogenolysis of n-butane with a high and almost temperature-independent selectivity to ethane. Cata lysts having higher Ru contents (2.5 and 4%) are less well dispersed, but show higher turnover frequencies for this reaction, and selectivit ies which change with temperature, with methane the major product thro ughout. Oxidation and low-temperature reduction of these catalysts cau ses loss of metal area, and much enhanced turnover frequencies: produc t selectivity behaviour is then in each case that characteristic of la rge metal particles. A final high-temperature reduction leads to lower turnover frequencies, with little change in product selectivity. Resu lts are also reported for catalysts prepared from RuCl3 and from Ru(NO )(NO3)(3), and for Ru powder: propane hydrogenolysis has also been exa mined as an adjunct to this study.