Abstract
Abstract Very highly dispersed 1% Ru Al 2 O 3 prepared from Ru(acac)3, after high-temperature reduction, catalyses the hydrogenolysis of n-butane with a high and almost temperature-independent selectivity to ethane. Catalysts having higher Ru contents (2.5 and 4%) are less well dispersed, but show higher turnover frequencies for this reaction, and selectivities which change with temperature, with methane the major product throughout. Oxidation and low-temperature reduction of these catalysts causes loss of metal area, and much enhanced turnover frequencies: product selectivity behaviour is then in each case that characteristic of large metal particles. A final high-temperature reduction leads to lower turnover frequencies, with little change in product selectivity. Results are also reported for catalysts prepared from RuCl3 and from Ru(NO) (NO3)3, and for Ru powder: propane hydrogenolysis has also been examined as an adjunct to this study.
Published Version
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