High-thermal-stability catalyst for propane low-temperature catalytic combustion as well as preparation method and application thereof

The invention discloses a high-thermal-stability catalyst for propane low-temperature catalytic combustion and a preparation method and application thereof. The catalyst provided by the invention is Co3O4/SmMn2O5 with the loading capacity of 30%, the high-temperature thermal stability temperature of the catalyst ranges from 400 DEG C to 1000 DEG C, and in other words, the catalyst can be circulated for 24 h at the temperature of 400 DEG C to 1000 DEG C and does not deform. The catalyst can be used for low-temperature catalytic combustion of propane, and the temperature at which the conversion rate of propane reaches 90% is only 200-230 DEG C. The preparation method of the catalyst comprises the following steps that: a carrier mullite (SmMn2O5) is obtained by taking samarium nitrate hexahydrate and manganese acetate tetrahydrate as raw materials through a deposition-precipitation method at room temperature; then, the mullite and cobalt nitrate are used as precursors, Co3O4/SmMn2O5 is obtained through a deposit