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The Pd4S phase of palladium sulfide is known to be a highly selective alkyne hydrogenation catalyst at atmospheric pressure. Results presented here demonstrate that high selectivity can be retained at the elevated pressures required in industrial application. For example, in a mixed acetylene/ethylene feed, 100% conversion of acetylene was attained with a selectivity to ethylene in excess of 80% at...
A series of copper rich catalysts with different Cu:Pd atomic ratios were screened for the selective hydrogenation of propyne. Sample with 50:1 Cu:Pd ratio exhibited high propene selectivity, yet could be operated at temperatures far lower than typically observed for Cu only catalyst. It is believed that Pd facilitates reaction at Cu sites by promoting hydrogen dissociation at low temperature, followed...
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