▎ 摘　　要

NOVELTY - Composite methane catalyst composite comprises 1-10% methane catalyst and graphene oxide. The methane catalyst is perovskite methane catalyst, aluminate type methane catalyst or metal oxide methane catalyst. USE - Composite methane catalyst. ADVANTAGE - The catalyst can effectively reduce methane burning temperature, improve methane combustion rate, and has low cost, simple preparation process, high temperature resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation of the catalyst comprising: (A) taking perovskite-type methane catalyst of formula AxA'1-xB'yB"1-yO3, adding nitrate in deionized water, adding citric acid, stirring at room temperature, mixing to obtain precursor solution, water bath heating and stirring to colloid color depth to form wet gel, aging, drying and grinding at 800 degrees C, cooling to obtain perovskite-type methane catalyst; (B) ultrasonically dispersing graphene oxide, magnetically stirring, heating to boiling point, condensing and refluxing for 2 hours, vacuum pumping filtering, drying and grinding to obtain graphene oxide perovskite composite methane catalyst, adding citric acid, stirring at room temperature to obtain precursor solution, water bath heating and stirring to colloid color depth to form wet gel; (C) aging, drying and grinding at 1100 degrees C, cooling to obtain hexaaluminate type methane catalyst, processing oxidized graphite alkene ultrasonic dispersion, adding prepared catalyst in 1:1 water-alcohol solution, magnetically stirring, heating to boiling point, condensing and refluxing for 2 hours; (D) vacuum pumping, filtering, drying and grinding to obtain oxidized graphite alkene six aluminum acid salt compound methane catalyst; and (E) when methane catalyst is metal oxide methane catalyst, adding transition metal elements of nitrate into deionized water, adding citric acid, stirring at room temperature to obtain a precursor solution, water bath heating and stirring to colloid color depth to form wet gel, aging, drying and grinding at 800 degrees C, and cooling to obtain metal oxide methane catalyst, ultrasonically dispersing graphene oxide, adding prepared catalyst in 1:1 water-alcohol solution, magnetically stirring, heating to boiling point, condensing and refluxing for 2 hours, vacuum pumping, filtering, drying and grinding to obtain graphene oxide metallic oxide methane catalyst. A=alkaline-earth metal element; B', B"=transition metal element; and x, y=0-1.