▎ 摘　　要

NOVELTY - Catalyst, which is formed by impregnating metal nitrate crystal hydrate on the surface of the porous carbon material and calcining. USE - The catalyst is useful for removing dioxin from fly ash (claimed). ADVANTAGE - The catalyst: improves the removal efficiency of dioxins; can reduce the reaction temperature; shortens the reaction time; reduces energy consumption; can degrade the dioxins in the fly ash to below 50 ng TEQ/kg; can reduce the emission of dioxin and has a good application prospect. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the catalyst comprising (a) uniformly stirring the metal nitrate crystalline hydrate and the porous carbon material in the deionized water, performing constant temperature evaporating and concentrating to obtain the concentrated solution and (b) drying the concentrated solution and calcining in inert gas to obtain the catalyst; and (2) removing dioxin from fly ash comprising fully mixing the catalyst and fly ash in a dosage ratio of 1:5-20 to obtain the mixture and placing the mixture in an inert gas to react.