Denitration catalyst with titanium-aluminum-cerium composite oxide as carrier and preparation method thereof

Abstract

The invention discloses a denitration catalyst with a titanium-aluminum-cerium composite oxide as a carrier and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing titanium dioxide, pseudo-boehmite, cerium hydroxide and nitric acid, and aging at room temperature Then dry and calcinate to obtain titanium-aluminum-cerium composite oxide; dissolve ammonium metatungstate and ammonium metavanadate in oxalic acid solution to obtain impregnation solution, disperse titanium-aluminum-cerium composite oxide in the impregnation solution, stir evenly and evaporate to dryness Dry and calcinate the material after evaporating to dryness to obtain a powder catalyst; mix the powder catalyst with glass fiber, polyacrylamide, glycerin and deionized water, and go through mixing, mud refining, aging and extrusion molding to obtain a honeycomb shape catalyst; the honeycomb catalyst is subjected to two-stage drying and two-stage calcination to obtain a denitration catalyst with titanium-aluminum-cerium composite oxide as the carrier. The destocking catalyst is prepared by the preparation method, and has the characteristics of wide service temperature, high denitrification efficiency and good sulfur and water resistance.

Description

technical field [0001] The invention relates to the technical field of flue gas denitration catalyst preparation, and more specifically, relates to a denitration catalyst with a titanium-aluminum-cerium composite oxide as a carrier and a preparation method thereof. Background technique [0002] In recent years, my country's NO x If there is no control, the emission of nitrogen oxides will reach 30 million tons in 2020, which will bring a huge threat to my country's atmospheric environment. [0003] In view of the negative impact of nitrogen oxides on the atmospheric environment and the severe situation of nitrogen oxide emission control, the Ministry of Environmental Protection has issued new nitrogen oxide emission standards for power plants, boilers, coking, cement, glass, steel and other industries. The successive implementation of new standards has greatly stimulated the development of the denitrification industry, including related equipment manufacturing, catalyst man...

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Problems solved by technology

Among them, the key factor is the selection and addition of molding aids, but the composition, content and addition method of various molding aids in commercial catalysts are technical secrets, and there are few clear reports on various molding aids and their contents in literature reports

In addition, because the boiler load often changes in a wide range, resulting in large fluctuations in flue gas temperature, which requires the catalyst to maintain high activity in a wide temperature range

At present, the SCR catalysts reported in the patent literature are mainly medium-high temperature catalysts (300-400°C) with high dust arrangement and low-temperature catalysts (less than 200°C) with low dust arrangement. Warm catalyst (200~400℃)

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