Selective Hydrogenation of Acetylene over Pd-Co/C Catalysts: The Modifying Effect of Cobalt

Novel bimetallic Pd-Co catalysts supported on the carbon material Sibunit were synthesized by an incipient wetness impregnation method and used for ethylene production selective acetylene hydrogenation. It has been established that increase in Pd:Co molar ratio from 1:0 to 1:2 0.5%Pd-Co/C catalysts, treated hydrogen at 500 °C, leads selectivity 60 67% (T = 45 °C). The does not change with a further modifier concentration. investigated TPR-H2, XRD, TEM HR, EDS, XPS methods. was shown palladium cobalt samples form Pd(1−x)Cox phases of solid solutions different compositions depending ratio. concentration particles increases up then remains constant level. In addition, monometallic Co present higher 1:2. optimal combination catalytic properties (the yield is 62–63%) typical 1:2–1:4. which mainly due presence containing ~41–43% at. cobalt.