The Effect of Addition Method of Impregnation Solution on Catalytic Properties of Pd-Ag/Al2O3 catalyst
Volume Title: 1
1Catalyst Senior Researcher
2Head of catalyst research group
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.