Carried noble metal complete-combustion catalyst and its prepn

Abstract

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.

Description

(1) Technical field

[0001] The invention relates to a catalyst for combustion reaction of natural gas and light alkanes. (two), background technology

[0002] The main component of natural gas is methane, which has the characteristics of high calorific value, clean combustion and abundant reserves. It is a new generation of protoplasmic energy that will be developed and utilized in this century. In order to improve the combustion efficiency of natural gas and reduce the level of pollutant emissions, it is necessary to use a combustion catalyst with high ignition activity and low combustion completion temperature to modify the original burner. At present, most commercial combustion catalysts are Pd / Al 2 o 3 Supporting system, it can overcome many unfavorable factors such as poor light-off activity, small reaction space velocity, and loss of activity due to high-temperature crystal phase transition of the general oxide-type combustion catalyst. However, at higher operating t...