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Mn-Fe-Al-Si low-temperature SCR catalyst, preparation method and applications thereof

A mn-fe-al-si, catalyst technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of poor stability of denitration efficiency and achieve good stability , improve the stability, the effect of good denitration effect

Active Publication Date: 2017-06-30
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the disadvantages that the denitrification effect of the existing low-temperature denitrification catalyst at low temperature still needs to be further improved, and its denitrification efficiency in the low temperature section is poor in stability, and provides a Mn-Fe-Al-Si low-temperature SCR catalyst and its preparation method and application

Method used

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  • Mn-Fe-Al-Si low-temperature SCR catalyst, preparation method and applications thereof

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preparation example Construction

[0037] The preparation method of above-mentioned Mn-Fe-Al-Si low-temperature SCR denitration catalyst of the present invention, this method is based on Fe(NO 3 ) 3 , Mn(NO 3 ) 2 and Al(NO 3 ) 3 Solution and SiO 2 The powder is used as the raw material, and the active components are loaded on the carrier by impregnation method, and the Mn-Fe-Al-Si low-temperature SCR denitration catalyst is prepared by roasting. At the same time, the specific preparation process parameters are optimized to further improve the catalyst. Low temperature denitrification efficiency, to ensure its low temperature denitrification effect, the specific preparation steps are as follows:

[0038] (1) SiO 2 Put the solid powder in a beaker, add deionized water, and let stand;

[0039] (2) According to the mass ratio of each component element and Si element in the catalyst, weigh a certain amount of Fe(NO 3 ) 3 , Mn(NO 3 ) 2 and Al(NO 3 ) 3 solution as the precursor of the active component and...

Embodiment 1

[0045] A kind of preparation method of Mn-Fe-Al-Si low-temperature SCR denitration catalyst of the present embodiment, its step is: with SiO 2 Solid powder, Fe(NO 3 ) 3 , Mn(NO 3 ) 2 and Al(NO 3 ) 3 The solution is the main raw material, and the active component is loaded on the carrier by impregnation method, wherein, the mass ratio of each component Mn:Fe:Al:Si is 1.51:1.26:0.34:1, and it is calculated that ferric nitrate, nitric acid The quality of the manganese and aluminum nitrate solution is poured into a beaker loaded with a silica carrier, and deionized water is added. After being fully stirred by a magnetic stirrer for 5 hours, it is placed in a blast drying oven at 105°C for 8 hours, and finally placed in a closed air After calcination at 450° C. for 5 h, and then cooling in the furnace, the Mn—Fe—Al—Si catalyst of this embodiment was obtained. combine figure 1 , the support in this catalyst is SiO 2 , whose active component MnO x Mainly Mn 2 o 3 , FeO x ...

Embodiment 2

[0048]A kind of preparation method of Mn-Fe-Al-Si low-temperature SCR denitration catalyst of the present embodiment, its step is: with SiO 2 Solid powder, Fe(NO 3 ) 3 , Mn(NO 3 ) 2 and Al(NO 3 ) 3 The solution is the main raw material, and the active components are loaded on the carrier by impregnation method, wherein, the mass ratio of each component Mn:Fe:Al:Si is 1.4:1.3:0.4:1, and it is calculated that iron nitrate, nitric acid The quality of the manganese and aluminum nitrate solution is poured into a beaker loaded with a silica carrier, and deionized water is added. After being fully stirred by a magnetic stirrer for 12 hours, it is placed in a blast drying oven at 80°C for 12 hours, and finally placed in a closed air After calcination at 350° C. for 6 hours, and then cooling in the furnace, the Mn—Fe—Al—Si catalyst of this embodiment was obtained.

[0049] Apply the catalyst obtained in this example to flue gas selective catalytic reduction denitrification, and c...

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Abstract

The invention discloses a Mn-Fe-Al-Si low-temperature SCR catalyst, a preparation method and applications thereof, and belongs to the technical field of low-temperature SCR denitration. According to the SCR denitration catalyst, SiO2 solid powder, a Fe(NO3)3 solution, a Mn(NO3)2 solution and a Al(NO3)3 solution are adopted as main raw materials, active components are supported on the carrier SiO2 by using an impregnation method, magnetic stirring and drying treatment are performed, and finally calcination is performed in an air atmosphere so as to obtain the SCR denitration catalyst, wherein the SCR denitration catalyst uses SiO2 as the carrier and uses MnOx, FeOx and Al2O3 as the active components, and a mass ratio of Mn to Fe to Al to Si in the catalyst is (1.4-1.6):(1.1-1.3):(0.2-0.4):1. According to the present invention, with the technical scheme, the denitration effect of the catalyst at the low temperature can be significantly improved, the service life of the catalyst is easily prolonged, the denitration efficiency stability at the low temperature is good, and the denitration catalyst is suitable for the promotion application in power plant flue gas denitration or coking plant denitration and other low temperature SCR denitration.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and catalysis, and more specifically relates to a Mn-Fe-Al-Si low-temperature SCR catalyst and its preparation method and application, which are mainly used in low-temperature SCR denitrification in coal-fired power plants or coking plants. Background technique [0002] Energy is an important material basis for the survival and development of human beings. With the increasing production and consumption of energy, the environmental problems caused by traditional fossil combustion are becoming more and more serious, especially the large amount of nitrogen oxides produced by coal-fired power plants or coking plants ( NO x ) have caused great pollution to the environment. Nitrogen oxides (NO x ) is one of the harmful substances of air pollution, which can easily cause acid rain and photochemical smog when accumulated in the air to a certain extent, which will seriously affect the en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01D2251/2062B01D2258/0283B01J23/002B01J23/8892B01J2523/00B01J2523/31B01J2523/41B01J2523/72B01J2523/842
Inventor 朱宝忠尹寿来孙运兰陈光朱自成訾朝辉李国波
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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