Carried noble metal complete-combustion catalyst and its prepn

The catalyst for the combustion reaction of natural gas and light alkane consists of alkali earth metal 1-60 wt%, noble metal 0.2-5 wt% and alumina 40-99 wt%. The precursors of the components are soluble organic or inorganic salt, and there must not be halogen in the raw material. The catalyst is used in both self-heated combustor and heated combustor and can ignite combustion at 284-350 deg.c. In case of low heat transfer efficiency, it can heat fuel gas fluid spontaneously to carry out complete combustion with less CO and NOx in tail gas. The said catalyst has the advantages of low initiation temperature, wide use range of temperature and space velocity, high stability, long service life, etc. and can be formed in different shape for practical industrial application.