KINETICS, POISONING AND MASS-TRANSFER EFFECTS IN LIQUID-PHASE HYDROGENATIONS OF PHENOLIC COMPOUNDS OVER A PALLADIUM CATALYST

The influence of poisoning and mass transport on the performance of a suspended palladium catalyst for the liquid-phase hydrogenation of o-cresol h for the various transport and reaction steps occuring in the three-phase slurry system and these were combined into an overall rate expression. From th analysed either by an experimental approach or by calculation. The hydrogenation in the absence of poison is described by a Langmuir-Hinshelwood adsorption model with adsorption of hydrogen and substrate on diffe present in the feed, the activity loss can be described by an extended model of the same type; experimental results show that the poison is very strong between poison and substrate on the remaining catalyst surface. The selectivity is not affected by increasing poison concentration. © 1978.