Catalytic hydrodechlorination of 2,4-dichlorophenol using co-current down flow contactor reactor

in this study, a new prospective regarding application of gas liquid reactions in the presence of catalyst was studied for pollution abatement in the novel reactor. Catalytic hydrodechlorination (CHDC) of 2,4-dichlorophenol (2,4-DCP) in aqueous system was carried out under the operating condition at 25- 75 degree C, I atm in co-current down flow contactor reactor. under these reaction conditions complete conversion of 2,4-DCP into less toxic products (phenol and cyclohexanone) was achieved using 5% pf/c catalyst. At typical temperature the hydrodechlorinatin reaction of 2,4-DCP was completed after 10 min 2,4-DCP was converted to 96% of phenol and 3.81 of cyclohexanone using 0.4 g/L of 5% Pd/C catalyst. The increase in initial concentration of 2,4-DCP resulted in the increase in time for the dechlorination of 2,4-DCP. The calculated activation energy values amounted to 43 KJ/mol for the CHDC of 2,4-DCP exhibiting that this reaction occurs minly under the surface reaction rate controlled condition. (author)