DEACTIVATION OF PD CATALYSTS IN THE HYDRODECHLORINATION OF CHLOROPENTAFLUOROETHANE

The deactivation behavior of Pd catalysts on different supports in the hydrodechlorination of chloropentafluoroethane (CF3CF2Cl) was investi gated. Changes of the BET surface area and the metal percentage expose d, measured by a multipurpose in situ catalyst characterization system during the reaction, gave some information about the deactivation mec hanism of the Pd catalysts. The deactivation of the Pd catalysts was m ainly caused by sintering of Pd particles rather than by coking. The s intering of Pd particles on the catalyst surface was promoted by the r eaction of hydrogen fluoride with the support of the catalysts. (C) 19 98 Elsevier Science B.V.