Hydrodechlorination of CFC-12 over Novel Supported Palladium Catalysts

Novel supported palladium catalysts were prepared through organometallic Pd compounds including dichlorobistriphenylphosphine palladium (DCTPPP) and dithiocyanatobistriphenylphosphine palladium (DTTPPP) for the hydrodechlorination of CFC-12. These catalysts exhibited excellent catalytic activities in hydrodechlorination of CFC-12. Particularly, high selectivities of CH2F2 formation were achieved over the catalysts, DCTPPP/MgF2 with 88.1% and DTTPPP/MgF2 with 85.8%, at a limited conversion level (<5%). No obvious deactivation was observed for DCTPPP/MgF2 and DTTPPP/MgF2 catalysts within 60 h. The higher catalytic activity, CH2F2 selectivity and catalyst stability may be mainly attributed to high dispersions of palladium.