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Direct Synthesis of Propylene from Ethylene over Palladium Containing Catalysts: Influence of the Support Nature

An influence of support acidity on the dimerization function on Pd-containing catalysts was studied. After addition of Re2O7 to PdO/SZ as ethylene dimerization catalyst with high butene-2 selectivity the obtained PdO-Re2O7/SZ catalyst was tested in direct synthesis of propylene from ethylene under mild conditions (40°C and atmospheric pressure). Propylene yield was approximately 45%, which is close to equilibrium one.