DECOMPOSING METHOD FOR CHLORINATED ORGANIC COMPOUND

PROBLEM TO BE SOLVED: To decompose a harmful chlorinated organic compound such as dioxin by bringing gas containing the chlorinated organic compound into contact with a catalyst containing specified three components at the specified temperature and under the presence of oxygen of specified vol.%. SOLUTION: Gas containing a chlorinated organic compound is brought into contact with a catalyst at the temperature of 100-350 deg.C and under the presence of oxygen of 0.5-25vol.%. The catalyst is composed of three components of an oxide of at least an element selected out of a vanadium oxide, a tungsten oxide, an erbium, a neodymium and the like. The shape of the oxide catalyst is the columnar shape, spherical shape, honeycomb shape or the like. The catalyst is particularly of superior resistance to toxicity against sulflur oxide. A chlorinated organic compound such as dioxin contained in exhaust combustion gas in municipal waste or the like, an aromatic chlorinated compound as a precursor of dioxin or the like is decomposed and removed by the catalyst.