PREPARATION METHOD OF CATALYST FOR OXIDIZING TOXIC CHLORINATED AROMATIC COMPOUNDS

摘要

PURPOSE: Disclosed is a catalyst for oxidizing toxic chlorinated aromatic compounds such as polychlorinated dibenzo-p-dioxin, polychlorinated dibenzo furan, polychlorinated biphenyl, and chlorinated benzene emitted during the incineration of municipal waste or medical waste by supporting titanium dioxide substrate (TiO2) having a degree of crystallinity ranging from 2 to 10 with vanadium oxides (V2O5) and chromium oxides (Cr2O3). CONSTITUTION: The preparation method of the catalyst comprises the steps of calcining titanium dioxide in a temperature range of 400 to 600deg.C to obtain titanium dioxide having a degree of crystallinity of 2 to 10; impregnating calcined titanium dioxide in vanadium oxalate solution and chromium nitrate solution separately; drying it in a temperature range of 100 to 300deg.C for 2-12hrs; calcining it under air atmospheric condition for 5-15hrs in a temperature range of 400 to 600deg.C. The catalyst is characterized by comprising 80 to 90wt.% of TiO2, and the weight ratio of vanadium to chromium is 2:1 to 5:1.