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Bimetal ferromanganese low-temperature catalyst for selective catalytic reduction (SCR) denitration as well as preparation method and application of catalyst

A denitration catalyst and bimetal technology, applied in the field of denitration catalysts, can solve the problems of poor stability and low destocking efficiency, and achieve the effects of good stability, not easy to fall off, and wide source.

Inactive Publication Date: 2019-07-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the poor stability and low denitrification efficiency of existing denitrification catalysts in the low temperature section, and to provide a bimetallic ferromanganese low temperature SCR catalyst

Method used

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  • Bimetal ferromanganese low-temperature catalyst for selective catalytic reduction (SCR) denitration as well as preparation method and application of catalyst
  • Bimetal ferromanganese low-temperature catalyst for selective catalytic reduction (SCR) denitration as well as preparation method and application of catalyst
  • Bimetal ferromanganese low-temperature catalyst for selective catalytic reduction (SCR) denitration as well as preparation method and application of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The method for preparing a bimetal ferromanganese low-temperature SCR denitration catalyst of this embodiment includes the following steps: using Fe(NO 3 ) 3 , Mn(NO 3 ) 2 With citric acid as raw materials, the active components are physically and chemically mixed by sol-gel method through water bath magnetic stirring. The mass ratio of each component Mn: Fe: citric acid is 0.05: 1: 0.5, and the required weight of iron nitrate is calculated , The quality of manganese nitrate solution and citric acid crystals. Then pour the weighed ferric nitrate and manganese nitrate solution into a beaker containing citric acid crystals, add deionized water, and after magnetically stirring in a 50℃ water bath for 3 hours, place it in a 105℃ blast drying oven to dry for 3 hours, and finally After roasting in a closed air atmosphere at 350° C. for 4 hours, and then cooling in the furnace, the bimetallic ferromanganese catalyst of this embodiment is obtained.

Embodiment 2

[0030] The method for preparing a bimetal ferromanganese low-temperature SCR denitration catalyst of this embodiment includes the following steps: using Fe(NO 3 ) 3 , Mn(NO 3 ) 2 With citric acid as raw materials, the active components are physically and chemically mixed by sol-gel method through water bath magnetic stirring. The mass ratio of each component Mn: Fe: citric acid is 0.1: 1: 1.5, and the required weight of iron nitrate is calculated , The quality of manganese nitrate solution and citric acid crystals. Then pour the weighed ferric nitrate and manganese nitrate solution into a beaker containing citric acid crystals, add deionized water, and after magnetically stirring in a 50℃ water bath for 3 hours, place it in a 105℃ blast drying oven to dry for 3 hours, and finally After roasting in a closed air atmosphere at 450°C for 3 hours, and then cooling in the furnace, the bimetallic ferromanganese catalyst of the present embodiment is obtained.

Embodiment 3

[0032] The method for preparing a bimetal ferromanganese low-temperature SCR denitration catalyst of this embodiment includes the following steps: using Fe(NO 3 ) 3 , Mn(NO 3 ) 2 With citric acid as raw materials, the active components are physically and chemically mixed by sol-gel method through water bath magnetic stirring. The mass ratio of each component Mn: Fe: citric acid is 0.2: 1: 2, and the required weight of iron nitrate is calculated , The quality of manganese nitrate solution and citric acid crystals. Then pour the weighed ferric nitrate and manganese nitrate solution into a beaker containing citric acid crystals, add deionized water, and after magnetically stirring in a 50℃ water bath for 3 hours, place it in a 105℃ blast drying oven to dry for 3 hours, and finally After calcination in a closed air atmosphere at 550° C. for 2 hours, followed by cooling in the furnace, the bimetallic ferromanganese catalyst of this example was obtained.

[0033] Examples of the effect...

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Abstract

The invention discloses a bimetal ferromanganese low-temperature catalyst for selective catalytic reduction (SCR) denitration as well as a preparation method and application of the catalyst, and belongs to the fields of atmospheric pollution control technology and environment-friendly catalytic materials. The catalyst for the SCR denitration is prepared by adopting Fe(NO3)3, Mn(NO3)2 and citric acid reagents as main raw materials and adopting a sol-gel method. The catalyst is obtained by the steps of performing magnetic stirring in a water bath, performing drying treatment and performing roasting in an air atmosphere, the catalyst uses MnOx and FeOx as active components, wherein a mass ratio of component element Mn to component element Fe to a carbon source in the catalyst is (0.05-0.2):(0.8-1.2):(0.5-2), and the catalyst has an operating temperature of 120-200 DEG C. According to the technical solution provided by the invention, the method provided by the invention can significantly improve the denitration effect of the catalyst at a low temperature and facilitates prolonging the service life of the catalyst; and the catalyst provided by the invention has better stability of denitration efficiency at low temperature, and is suitable for promotion and applications in low-temperature SCR denitrification of sintering flue gas or coke oven flue gas.

Description

Technical field [0001] The invention relates to a denitration catalyst, in particular to a bimetal ferromanganese low-temperature SCR denitration catalyst, a preparation method and application thereof. Background technique [0002] Nitrogen oxides (NO x ) Is one of the main pollutants that cause acid rain, photochemical smog and other environmental problems. It is also the focus and difficulty of the current atmospheric environmental protection. How to effectively reduce and control nitrogen oxides (NO x ) Emissions have become one of the important research topics in the current environmental protection field. In the prior art, the selective catalytic reduction (Selective Catalytic Reduction, SCR) denitration technology is mainly used to reduce NO emissions from coal combustion. x Control, that is, under the action of a catalyst, using a reducing agent (usually NH 3 Or urea) will NO x It is reduced to nitrogen and water, which have less impact on the atmosphere. SCR process has h...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/8892
Inventor 朱宝忠孙运兰嵇江龙尹寿来方祺隆肖松苡于海龙刘恩海
Owner CHANGZHOU UNIV
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