Hydrogenation of CFC-114a over Palladium Catalysts

Abstract

The effects of supports and 1B group metal addition have been investigated in a hydrogenation of CFC-114a. Among the supports, alumina and titania supported palladium catalysts showed higher activity and selectivity for HFC-134a than those on active carbon and silica supports. The reactivity patterns are in good correlation with the amount of strongly adsorbed CFC reactant, as evidenced by the TPD experiments. Bimetallic catalysts(palladium and 1B metal; Au and Ag) supported on alumina showed some increase in activity and selectivity. It is presumed from hydrogen chemisorption, TPD and EXAFS that the role of 1B metals is to increase the dispersion of palladium crystallites.