Catalyst applied to low temperature catalytic combustion of chlorination aromatic hydrocarbon as well as preparation method and application thereof

The invention discloses a catalyst applied to the low temperature catalytic combustion of chlorination aromatic hydrocarbon, and the catalyst refers to alkaline-earth metal modified cobalt oxide, wherein the alkaline-earth metal is magnesium, calcium, strontium or barium, and the molar ratio of cobalt to the alkaline-earth metal is (19 to 1) to (1 to 1). The invention further discloses a preparation method of the catalyst and application of the catalyst in the low temperature catalytic combustion of the chlorination aromatic hydrocarbon. The alkaline-earth metal modified cobalt oxide catalyst provided by the invention has the advantages of simple preparation technology, low price, high catalytic activity, high chlorine poisoning resistance, long service life and the like, and can be used for effectively suppressing chlorination. Under the condition of lower reaction temperature, the catalyst can be used for stably converting the chlorination aromatic hydrocarbon in waste gas into carbon dioxide, chlorine and