the effect of addition method of impregnation solution on catalytic properties of pd-ag/al2o3 catalyst

The impregnation of alumina support with pdcl2 precursor solution was investigated in batch and semi-batch modes of pd addition using a recycle packed-bed impregnation reactor# uv-visible analysis was used to evaluate kinetic adsorption of pd on alumina support# transient data of palladium adsorption on alumina was studied# it was observed that pd adsorption was very rapid completing within few minutes# bi-metallic pd-ag/al2o3 catalysts were synthesized by sequential impregnation# co-chemisorption and co-tpd were used to characterize synthesized bi-metallic samples and their performance were evaluated for tail-end acetylene selective hydrogenation process# it was observed that by batch-wise addition of pd solution, a sample obtained with lowest amount of pd dimmers that had highest ethylene selectivity#