Manganese-cerium composite oxide low-temperature denitration catalyst with hollow multi-shell microsphere structure

A composite oxide and low-temperature denitrification technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of vanadium-titanium-based catalysts, catalyst poisoning, Temperature drop and other problems, to achieve the effect of improving low-temperature denitrification performance, good denitrification activity, and long contact time
CN104857950AInactive Publication Date: 2015-08-26XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2015-08-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a manganese-cerium composite oxide low-temperature denitration catalyst with a hollow multi-shell microsphere structure, which belongs to the technical field of catalytic treatment of flue gas. The catalyst is characterized in that the catalyst is composite oxide of MnOx and CeO2 and has the hollow multi-shell microsphere structure, and the diameters of microspheres are in a range of 1 to 3 [mu]m; annular cavities are located among spherical shells, so a hollow multi-shell structure is formed, which enables the catalyst to have a great specific surface area, as great as 110 to 190 m<2> / g; MnOx and CeO2 are uniformly distributed and in a mol ratio of Mn to Mn+Ce of 0.2 to 0.7; and MnOx is composed of Mn2O3 and MnO2. The catalyst has good selective catalytic reduction performance at a low temperature; the denitration efficiency of the catalyst reaches more than 95% when reaction temperature is 180 DEG C and reaction space velocity is 36000 per hour; and the catalyst is applicable to treatment of nitrogen oxides in flue gas of fire coal and has wide application prospects.
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Description

technical field

[0001] The invention belongs to a novel catalyst and its preparation method, in particular to a manganese-cerium composite oxide catalyst with a hollow multi-shell microsphere structure and its preparation method. The catalyst has high denitrification catalytic activity at low temperature, It can be used for catalytic treatment of nitrogen oxides in coal-fired flue gas. Background technique

[0002] The increasingly serious smog is the most serious environmental problem facing our country at present, which seriously threatens the healthy development of the national economy and the health and life safety of the people. Nitrogen oxides (NO x ) is one of the main pollutants causing smog. NO x It is extremely harmful, and its emission can lead to photochemical smog, acid rain, ozone layer damage, and cause great harm to human health and the ecological environment. With the continuous development of my country's economy, the emission of nitrogen oxides will co...

Claims

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