Chromium-containing light hydrocarbon combustion catalyst and preparation method thereof

Abstract

The invention relates to a chromium-containing light hydrocarbon combustion catalyst and a preparation method thereof, and belongs to the technical field of catalysts. The chromium-containing light hydrocarbon combustion catalyst is characterized in that a mass ratio of Al2O3 to Cr2O3 to CeO2 or Al2O3 to CrCl3 to CeO2 is A:B:C, wherein A:B is between 1 / 0.05 and 1 / 0.5, C is between 1 and 5 percent, Al2O3 is between 65 and 95 percent (W / W percent), Cr2O3 is between 5 and 50 percent (W / W percent), CrCl3 is between 5 and 50 percent (W / W percent), and CeO2 is between 0 and 5 percent (W / W percent). The preparation method comprises the following steps of: dissolving chromium nitrate or chromium chloride and aids of nitrates in water, dripping onto an aluminum oxide carrier, stirring, standing, drying, calcining at a certain temperature, cooling, grinding, tabletting, crushing and sieving to prepare the chromium-containing light hydrocarbon combustion catalyst. The chromium-containing light hydrocarbon combustion catalyst has the advantages of high low-carbon alkane catalytic combustion activity, high stability, simple preparation process, readily available raw materials, low cost and environment friendliness.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a chromium-containing light hydrocarbon combustion catalyst and a preparation method. Background technique [0002] With the development of human society and the acceleration of industrialization in various countries in the world, the fossil fuel resources on the earth are continuously decreasing, and environmental pollution is becoming more and more serious. Energy and environmental protection issues have been attached great importance by governments of all countries. The combustion of fossil fuels has always been the pillar of the world's energy industry, but the traditional flame combustion method has low combustion efficiency and high pollutant content in the exhaust gas. Catalytic combustion of light hydrocarbons is regarded as an efficient and low-emission combustion route, and has become an important topic of concern to scientific research and engineering technicians from ...

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Problems solved by technology

[0007] The methane combustion catalyst involved in Chinese patent CN 101293201 B adopts a sol-gel method to prepare a composite oxide catalyst in which perovskite LaMn0.8O3 and pyrochlore La2Sn2O7 coexist, and has good thermal stability and reactivity. The synthesis method Simple and low cost, but the specific surface area is small so that the reaction activity cannot be improved; the methane combustion catalyst involved in the Chinese patent CN 1326607 C adopts coprecipitation method, hydrothermal synthesis method and sol-gel method to prepare transition metal substituted hexaaluminate Salt catalyst, the active component can be iron, cobalt, nickel, copper, etc. substituted hexaaluminate, the catalyst is stable at high temperature, and has a high specific surface area, but the catalytic activity is relatively low

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