Preparation method of low-temperature high-efficiency denitrification catalyst MnO2

Abstract

The invention relates to a preparation method of a low-temperature high-efficiency denitrification catalyst MnO2, which comprises the following steps: dissolving P123 in a deionized water-hydrochloric acid mixed solution, sequentially adding butanol and ethyl orthosilicate, and stirring; pouring into a closed polypropylene reaction kettle to react, collecting the solid, and drying; cleaning with an ethanol-hydrochloric acid mixed solution, and calcining to obtain a KIT-6 template; dropwisely adding into a manganous nitrate-ethanol mixed solution, stirring, separating the precipitate, cleaning with a sodium hydroxide solution and deionized water to a neutral state, and drying; and calcining in a muffle furnace to obtain the target substance. Compared with the traditional MnO2 catalyst, the mesoporous-structure MnO2 catalyst has the advantages of large specific area, more adsorbed oxygen and high removal ratio of oxynitrides; the MnO2 catalyst has high stability, and the mesoporous structure is still stable after denitrification treatment; and the MnO2 catalyst has higher selective catalytic reduction activity at low temperature, and thus, has favorable application prospects.

Description

technical field [0001] The invention relates to the preparation technology of selective catalytic reduction technology (SCR) catalyst, especially a low-temperature and high-efficiency denitrification catalyst MnO 2 method of preparation. Background technique [0002] NOx has become an object that needs to be controlled because it can cause a series of environmental problems such as acid rain, ozone, and smog. So far, the mainstream technology for removing NOx in the atmosphere is selective catalytic reduction flue gas denitration technology. Therefore, the flue gas denitrification process mostly adopts a high dust arrangement process (that is, the SCR device is arranged before the electrostatic precipitator to avoid reheating the coal-fired flue gas). However, this process arrangement is not only costly, but also leads to poisoning and deactivation of the catalyst. Therefore, it is of great significance to study a low-temperature and high-efficiency denitration catalyst....

AI Technical Summary

Problems solved by technology

But conventional MnO 2 The denitrification effect of the low temperature catalyst is poor, so the MnO 2 The denitrification effect of low temperature catalyst is of great significance

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