Aktivität, Selektivität und Katalysatorvergiftung bei der Hydrierung von Phenolen an Palladium in Flüssigphase

Abstract

The effects of catalyst poisoning on activity and selectivity for the liquid phase hydrogenation of phenols were investigated. Two different Langmuir adsorption models can be used to interprète the experimental activity-loss curves with increasing total poison content. Only kinetic runs allow a differentiation between these models. Experimental results show that the poison is very strongly adsorbed and that there is practically no interaction between poison and substrate during the adsorption on the remaining catalyst surface. The selectivity is not affected by increasing poison concentration.