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Preparation method of manganese and cerium loaded modified montmorillonite-based SCR (Selective Catalytic Reduction) denitration catalyst

A denitrification catalyst and montmorillonite-based technology, applied in the field of catalytic material preparation, can solve problems such as environmental damage, environmental pollution, photochemical smog, and ozone holes, and achieve the effects of low price, reduced production cost, and abundant reserves

Inactive Publication Date: 2018-08-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is also the main culprit of acid rain. It produces nitric acid and nitrous acid when it meets water, thus forming acid rain and acid fog. In addition, it can also cause photochemical smog and ozone holes, seriously pollute the environment, and cause difficulty to the environment we depend on for survival. repaired damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 2.000g of montmorillonite, add it into a 200ml beaker, add 98ml of deionized water to it to make a 2wt% montmorillonite suspension, and stir at room temperature for 24h to make it absorb water and swell. Use a pipette to pipette 1.7ml of concentrated hydrochloric acid with a concentration of 6M in a 100ml beaker, and add 2.2ml of TiCl to it under vigorous stirring 4 , Slowly add deionized water dropwise to dilute the solution to 50ml, and then age the solution at room temperature for 24h to prepare a pillared solution. The pillaring solution was added dropwise to the montmorillonite suspension, stirred at room temperature for 24 h, and then the resulting solution was centrifuged and washed with deionized water until the supernatant did not contain Cl - until. The resulting solid product was dried at 80°C overnight, and then calcined in a muffle furnace at 500°C for 6h. Take by weighing 0.500g mass fraction and be 50% manganese nitrate solution and 0.607g hexahyd...

Embodiment 2

[0021] Weigh 2.000g of montmorillonite, put it into a 200ml beaker, add 98ml of deionized water to it to make a 2wt% montmorillonite suspension, and stir at room temperature for 30h to make it absorb water and swell. Use a pipette to pipette 1.7ml of concentrated hydrochloric acid with a concentration of 6M in a 100ml beaker, and add 2.2ml of TiCl to it under vigorous stirring 4 , Slowly add deionized water dropwise to dilute the solution to 50ml, stir at room temperature for 9h, and age for 18h to obtain a pillared solution. Add the pillaring solution dropwise to the montmorillonite suspension, stir at room temperature for 30 h, then centrifuge the resulting solution, and wash with deionized water until the supernatant does not contain Cl - until. The resulting solid product was dried at 65°C overnight, and then calcined in a muffle furnace at 500°C for 6h. Take by weighing 1.177g mass fraction and be 50% manganese nitrate solution and 0.286g hexahydrate cerium nitrate soli...

Embodiment 3

[0024] Weigh 2.000g of montmorillonite, add it into a 200ml beaker, add 98ml of deionized water to it to make a 2wt% montmorillonite suspension, and stir at room temperature for 36h to make it absorb water and swell. Use a pipette to pipette 1.7ml of concentrated hydrochloric acid with a concentration of 6M in a 100ml beaker, and add 2.2ml of TiCl to it under vigorous stirring 4 , Slowly add deionized water dropwise to dilute the solution to 50ml, stir at room temperature for 12h, and age for 24h to obtain a pillared solution. The pillaring solution was added dropwise to the montmorillonite suspension, stirred at room temperature for 36 h, and then the resulting solution was centrifuged and washed with deionized water until the supernatant did not contain Cl - until. The resulting solid product was dried overnight at 65°C, and then calcined in a muffle furnace at 500°C for 8h. Take by weighing 1.245g mass fraction and be 50% manganese nitrate solution and 0.151g hexahydrate ...

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Abstract

The invention relates to a preparation method of a manganese and ceramic loaded modified montmorillonite-based SCR (Selective Catalytic Reduction) denitration catalyst and belongs to the field of preparation of catalytic materials. The invention provides the preparation method of the manganese and ceramic loaded modified montmorillonite-based catalyst, aiming at the disadvantages in the prior artthat the price of a carrier is relatively high, the reaction activity is relatively low, a temperature window is relatively narrow and the like. The preparation method comprises the following steps: modifying montmorillonite by utilizing a titanium tetrachloride solution; then loading active metal on the carrier by utilizing an ion exchange method and uniformly distributing the active metal on thecarrier; then calcining to prepare the SCR denitration catalyst. The catalyst provided by the invention has the advantages of relatively high denitration efficiency and relatively wide reaction temperature window and has an application prospect of being used as an industrial denitration catalyst.

Description

technical field [0001] The invention relates to a preparation method of a modified montmorillonite-based catalyst loaded with manganese and cerium, and belongs to the field of preparation of catalytic materials. Background technique [0002] Flue gas denitrification refers to the process of removing nitrogen oxides in combustion flue gas, which is an important measure to prevent environmental pollution. Nitrogen oxides are one of the main sources of air pollution and are toxic to humans and animals. It is also the main culprit of acid rain. It produces nitric acid and nitrous acid when it meets water, thus forming acid rain and acid fog. In addition, it can also cause photochemical smog and ozone holes, seriously pollute the environment, and cause difficulty to the environment we depend on for survival. Repair damage. At present, the main methods of flue gas denitrification are selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR). Among them, SC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J37/30B01D53/86B01D53/56B01D53/90
CPCB01D53/8628B01D53/90B01J23/34B01J37/30
Inventor 臧丽坤吕杨刘敏
Owner UNIV OF SCI & TECH BEIJING
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