Flake manganese titanate coated attapulgite loaded ceo 2 Low-temperature photo-scr denitrification catalyst and preparation method thereof

Abstract

The invention belongs to the field of smoke gas denitration, and particularly relates to a flaky manganese titanate coated attapulgite CeO2-loaded low-temperature Photo-SCR (selective catalytic reduction) denitration catalyst and a preparation method. The catalyst of a three-dimensional structure is prepared by the method; attapulgite is used as a carrier for the catalyst; flaky manganese titanateis used for coating attapulgite; CeO2 is loaded on the surface of the flaky manganese titanate; the three-dimensional structure is formed. Through the structure, the oxidation reduction capability ofthe catalyst is enhanced; the reaction temperature is effectively reduced; the denitration catalyst with high denitration performance, excellent SO2 resistant performance, mild reaction condition, low energy consumption and little secondary pollution is formed; the defects of poor SO2 resistant performance at low temperature, poor low-temperature activity under the visible condition and the likeof the catalyst can be overcome at the same time.

Description

technical field [0001] The invention belongs to the field of flue gas denitrification, in particular to a sheet-shaped manganese titanate-coated attapulgite loaded with CeO 2 A low-temperature Photo-SCR denitration catalyst and a preparation method thereof. Background technique [0002] NOx (nitrogen oxides) is one of the main components of air pollution. In recent years, the emissions of nitrogen oxides in my country have risen rapidly with the rapid growth of energy consumption. And thus form acid rain and photochemical pollution, seriously endangering human health, destroying the environment, and restricting the sustainable development of economy and society. [0003] The V-W-Ti catalyst was first developed by Japan in the 1970s. It has the advantages of high denitrification efficiency, strong selectivity, strong anti-poisoning ability, stable and reliable, so it is still widely used in power plants. However, the reaction temperature of the catalyst is high and the inve...

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Problems solved by technology

[0006] The present invention aims at the existing flue gas denitrification catalysts that are expensive, have a narrow activity range, and are resistant to SO 2 Due to many problems such as weak performance, strong reaction conditions, high energy consumption, and many secondary pollutions, a flaky manganese titanate (MnTiO 3 ) coated attapulgite loaded CeO 2 A low-temperature Photo-SCR denitration catalyst and a preparation method thereof. The catalyst uses attapulgite as a carrier, and the attapulgite is coated with flaky manganese titanate, and CeO is supported on the surface of the flaky manganese titanate. 2 , forming a three-dimensional structure, which enhances the oxidation-reduction ability of the catalyst, effectively reduces the reaction temperature, and forms a high denitrification performance, anti-SO 2 A denitrification catalyst with excellent performance, mild reaction conditions, low energy consumption, and less secondary pollution, which can simultaneously improve the catalyst's resistance to SO at low temperatures 2 Poor performance, insufficient low-temperature activity under visible light conditions, etc.

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