MnOx-FeOx-CuSO4/TiO2 medium-low temperature SCR catalyst and preparation method thereof

Abstract

The invention discloses an MnOx-FeOx-CuSO4 / TiO2 medium-low temperature SCR catalyst and a preparation method thereof. The preparation method comprises the following steps of: (1) mixing hexadecyl trimethyl ammonium bromide, tetrabutyl titanate and anhydrous ethanol, and adjusting the pH value of the mixed solution with glacial acetic acid to prepare a Ti precursor sol; (2) adding the prepared Ti precursor sol into CuSO4.5H2O, continuing to adjust the pH value of the obtained solution with glacial acetic acid, and performing stirring under the protection of nitrogen to obtain a main active substance load; and (3) adding Mn(Ac)2.4H2O, Fe(NO3)3.9H2O and deionized water into the main active substance load sequentially, continuing to stir the obtained mixed liquid, then aging the mixed liquid in a water bath, and performing drying and calcining to obtain the finished catalyst product. The SCR catalyst prepared by using the preparation method has high activity of denitration at medium-low temperatures of 200-350 DEG C, can adapt to requirements of practical industrial application, and has a very broad prospect of industrial application.

Description

technical field [0001] The invention belongs to the technical field of denitrification catalysts, in particular to a MnOx-FeOx-CuSO 4 / TiO 2 Medium and low temperature SCR catalyst and preparation method thereof. Background technique [0002] In recent years, smog and smog have appeared frequently in various parts of our country, and the air pollution situation is severe. The pollution caused by nitrogen oxides (NOx) is particularly serious. Facing the increasingly serious air pollution problem, the control and emission reduction of nitrogen oxides must be accelerated How to quickly and effectively reduce NOx emissions has become an important task at present. [0003] Selective catalytic reduction denitrification technology (SCR) mainly uses NH 3 , urea, etc. as reducing agents, reducing NOx to non-toxic and harmless product N 2 and H 2 O. The most widely used commercially today is the V 2 o 5 / TiO 2 It is a catalyst, its denitrification rate can reach more than 90%...

AI Technical Summary

Problems solved by technology

The most widely used commercially today is the V 2 o 5 / TiO 2 It is a catalyst, its denitrification rate can reach more than 90% in industrial application, but it is only limited to the high temperature activity window (≥350°C), and V 2 o 5 Toxic, will produce pollution during production, use and disposal

[0004] At present, the low-temperature SCR denitrification catalyst widely used, its core technology has been monopolized by the United States, Japan, Germany and other countries, and has not yet been localized, which largely limits the development of my country's flue gas denitrification technology and the reduction of nitrogen oxides. Therefore, the research on low-temperature SCR catalysts has extremely important practical significance and economic value.

Images