Title: The influence of particle size and support on the catalytic properties of rhodium for hydrogenolysis of hexanes and methylcyclopentane
Abstract: The catalytic properties of rhodium for the hydrogenolysis of C6 hydrocarbons have been investigated. Rhodium preferentially cleaves bisecondary and primary-secondary carbon-carbon bonds. Primary-tertiary CC bonds react much more slowly. Methylcyclopentane (MCP) is converted to methyl-2-pentane, methyl-3-pentane, and n-hexane at temperatures lower than 503 K. The selectivity to n-hexane is low (10%) but measurable on well-dispersed Rh/Al2O3 catalysts and decreases when the dispersion decreases. Rh/SiO2 catalysts have a low selectivity for the formation of n-hexane whatever the dispersion. The specific activity for MCP conversion changes as a function of the dispersion of rhodium and of the support: small rhodium particles are more active than large particles when the support is silica, but the reverse is true on alumina. These changes of activity are consistent with the results reported for C2H6 hydrogenolysis on Rh/SiO2 and for C5H10 conversion on Rh/Al2O3. The variations of the catalytic properties for hydrogenolysis may be interpreted as due to the modification of the structure of the small rhodium particles observed on silica.
Publication Year: 1984
Publication Date: 1984-05-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 53
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