Non-noble metal oxide combustion catalyst, and preparation method and use thereof

Abstract

The present invention relates to a non-noble metal oxide combustion catalyst and a preparation method and use thereof, and belongs to the technical field of energy utilization and environment protection. The catalyst is iron oxide, cobaltosic oxide, nickel oxide, cupric oxide, vanadium oxide, chrome oxide, manganese dioxide or cerium dioxide prepared according to the following steps: (1) using hydrothermal chemical synthesis to form a precursor of a catalyst; and (b) washing, filtering, shaping, drying and calcinating the obtained precursor of the catalyst, and finally forming a combustion catalyst or coating the precursor of the catalyst on a carrier to form a combustion catalyst. The catalyst prepared by the method can be used in catalytic combustion of methane and other VOC gas, and has the advantages that the synthesis process is simple, the cost is low, the catalytic activity and hydrothermal stability is high, and the light-off temperature and complete combustion temperature of methane are low.

Description

technical field [0001] The invention belongs to the technical field of energy utilization and environmental protection, and in particular relates to a non-noble metal oxide combustion catalyst and its preparation method and application. Background technique [0002] Due to its stable, efficient and clean combustion performance, catalytic combustion is widely used in related industrial processes, such as gas turbines involving catalytic combustion of methane, exhaust gas purification of natural gas fueled vehicles (Catalysis Communications, 2005, 6(5): 329-336.) , coalbed methane treatment process; air purification involving CO catalytic combustion, CO gas sensor and PEMFC fuel cell gas purification (J.Am.Chem.Soc.,2011,133(29):11279-11288.); involving VOCs catalytic combustion VOCs tail gas treatment in petroleum refining and petrochemical, coal processing and conversion processes (Journal of Hazardous Materials, 2004, 109(1-3): 113-139.); [0003] Combustion catalysts have...

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Problems solved by technology

[0008] In the Chinese patent (200810110774.4) "a preparation method of a double perovskite methane catalytic combustion catalyst" and the Chinese patent (200810110955.9) "a preparation method of a methane combustion catalyst", the activity of the research is affected by the small specific surface area However, it is limited, the low-temperature catalytic activity is not good, and the process conditions are complicated

Chinese patent (200310118171.6) discloses a preparation method of a metal oxide with a high specific surface area, but the metal oxide is coated on the surface of a carbon carrier by impregnation, but no data on its catalytic combustion performance is given; Chinese patent (2010102686.8) A metal oxide methane combustion catalyst prepared by citric acid complexation method is disclosed. The light-off temperature is higher than 320°C, and the complete conversion temperature is as high as 600°C. This has relatively strict requirements on the material of the reaction equipment, and side reactions will occur , especially for the hydrothermal condition of the combustion process, the stability of the catalyst will be significantly reduced;

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