Preparation and Characterization of Novel Ni-Pd/Al2O3 nanocatalyst for dechlorination ofchlorinated hydrocarbons Print

In this study with a unique method، two samples of Ni-Pd/Al2O3 nanocatalyst were synthesized by new type of sol-gel method and with different aluminum precursors. In one case ammonia solution was added drop by drop to a well-stirred aqueous solution of aluminum nitrate to precipitate hydroxide in the pH=10، after gelation for 2 hours، nickel and palladium nitrate salts solution added to gel in aging step، after 6 hours catalyst (C1) precursor was prepared. In other case aluminum isopropoxide was refluxed at 70°C and then the suspension kept at 90°C/2 h for remove of alcohol، remains steps for preparation of catalyst (C2) precursor، were at the same of above. The gels washed with deionized water، and dried at 120°C then calcinated at 650 °C/5 h in air to produced porous catalysts (C1and C2). The obtained catalysts characterized by SEM، XRF، XRD، BET and PSA techniques. These powders showed BET surface area، 196 and 226 m2/g and PSA data 300 to 700nm for C1and C2 respectively.