Liquid phase selective hydrogenation reaction of methylacetylene and propadiene in propylene over moderately dispersed palladium catalysts

摘要

The palladium surface area of Pd/Al_2O_3 catalysts can be easily controlled by using a solution of dinitrodiammine-Pd(DNDA-Pd) dissolved in nitric acid and changing calcination temperature.Catalysts,with a varied Pd surface area of 25 - 300 m~2/g,were prepared on an alumina carrier whose surface area was ca. 200 m~2/g. The catalyst,prepared with DNDA/Pd and reduced by sodium formate solution,which had a low Pd surface area exhibited excellent selectivity in hydrogenation of methylacetylene (MA) and propadiene (PD) in C_3 feed.