Selectivity of product formation has been tested in hydrogenation of acetylene over 0.3 wt.% Pd/α-alumina and 0.5 wt.% Pd/TiO2 catalysts. Non-steady-state regime of catalyst operation was tested in pulse-flow experiments. Significant carbon poisoning appears to be a necessary requisite for selective formation of ethylene. The effect of hydrogen and acetylene partial pressure has been tested on the selectivity of C4 products. At 273-298 K the catalysts showed 26-35% selectivity for C4 hydrocarbons and <2.5% for ethane production at conversions of 30-40%. Deuterium distribution in ethylene and 1,3-butadiene and the deuterium content of the surface hydrogen pool have been compared and mechanism of diene formation has been discussed.
- C oligomers
- Pd catalyst
ASJC Scopus subject areas
- Physical and Theoretical Chemistry