TREATMENT OF GAS CONTAINING ORGANIC HALOGEN COMPOUND AND CATALYST FOR DECOMPOSITION OF ORGANIC HALOGEN COMPOUND

摘要

PROBLEM TO BE SOLVED: To decompose an org. halogen compd. with a catalyst maintaining its performance for a long time and to produce the catalyst for decomposition. SOLUTION: A flow of gas contg. less than 10vol.% org. halogen compd. is brought into contact with a catalyst contg. titania, silica and tungsten oxide as titania surface-coated with a porous layer of silica and tungsten oxide in the presence of less than 30vol.% steam based on the total flow rate of the gas to treat the org. halogen compd. The concn. of the silica is 0.5 to <2wt.% of that of the titania, and the titania and tungsten oxide are contained so that the molar ratio between Ti and W is regulated to (20-95):(80-5). The temp. of the flow does not exceed 500 deg.C. The org. halogen compd. is decomposed into CO, CO2 and hydrogen halide.