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Denitration catalyst as well as preparation method and application thereof

A technology of denitration catalyst and auxiliary agent, which is applied in the field of flue gas denitration, can solve the problems of difficult application of denitration catalyst, low nitrogen oxide efficiency, large energy consumption, etc. The effect of surface area

Pending Publication Date: 2021-03-19
SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of my country's economy, the treatment of flue gas nitrogen oxides in my country has entered all walks of life. The flue gas produced by the catalyst industry by decomposing nitrate precursors has an average temperature of 20-50 °C and has the characteristics of high concentration of nitrogen oxides. , making it difficult for my country's existing denitrification catalysts to be applied in this industry
For example, because the commercial vanadium-tungsten-titanium catalyst is used at a temperature of 200-420°C, the flue gas needs to be heated up significantly, which consumes a lot of energy. At the same time, the commercial vanadium-tungsten-titanium catalyst also has the disadvantage of low efficiency in treating high-concentration flue gas nitrogen oxides.

Method used

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preparation example Construction

[0026] The present invention provides a preparation method for the denitration catalyst described in the above scheme, which is characterized in that it comprises the following steps:

[0027] Dissolving positive divalent manganese salt and positive trivalent samarium salt in water to obtain an active precursor solution;

[0028] Immerse eggshell-shaped activated alumina balls into the active precursor solution for adsorption, and dry the adsorbed system to obtain a semi-finished product;

[0029] The semi-finished product is dipped into the potassium permanganate solution to cause an oxidation-reduction reaction, and the obtained solid product is washed and dried in sequence to obtain a denitration catalyst.

[0030] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known in the art.

[0031] The invention dissolves positive divalent manganese salt and positive trivalent samarium salt in water to obtain acti...

Embodiment 1

[0054] Weigh 10mL of deionized water and pour it into a beaker, weigh 1.44g (8.32mmol) of manganese acetate and 0.224g (0.67mmol) of samarium nitrate and place them in the weighed deionized water, dissolve completely, and obtain the active precursor solution; Measure 10g eggshell-type activated alumina balls (particle size is 4-6mm, specific surface area is 300m 2 / g), placed in the prepared active precursor solution, let it stand for 12h for adsorption, then dried at 60°C for 5h and 100°C for 5h, and placed the dried semi-finished product in 10mL with a mass concentration of 8.95% (5.66mmol) In the potassium permanganate solution, let it stand for 12 hours to carry out oxidation-reduction reaction, wash the obtained solid product with water until the pH value is 7, and finally dry at 60°C for 12h and 110°C for 6h to obtain the denitrification catalyst, wherein , the mass of manganese is 8% of the mass of the eggshell-type activated alumina ball, and the mass of samarium is 1%...

Embodiment 2

[0056] Weigh 10mL deionized water and pour it into a beaker, weigh (7.92mmol) 1.37g manganese acetate, 0.448g (1.33mmol) samarium nitrate and place them in the weighed deionized water, dissolve completely, and obtain the active precursor solution; Measure 10g eggshell-type activated alumina balls (particle size is 4-6mm, specific surface area is 300m 2 / g), placed in the prepared active precursor solution, let it stand for 12h for adsorption, then dried at 60°C for 5h and 100°C for 5h, and placed the dried semi-finished product in 10mL with a mass concentration of 9.47% (6.0mmol) In the potassium permanganate solution, let it stand for 12 hours to carry out the redox reaction, wash the obtained solid product with water until the pH value is 7, and finally dry at 60°C for 12h and 110°C for 6h to obtain a denitrification catalyst, wherein, The mass of manganese is 8% of the mass of the eggshell-type activated alumina ball, and the mass of samarium is 2% of the mass of the eggshe...

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Abstract

The invention provides a denitration catalyst as well as a preparation method and application thereof, and belongs to the technical field of flue gas denitration. The denitration catalyst comprises acarrier, an active component and an auxiliary agent, the active component and the auxiliary agent are loaded on the carrier; the carrier is an eggshell type activated alumina ball; the active component is manganese oxide; and the auxiliary agent is samarium oxide. The catalyst provided by the invention can maintain good denitration activity in a low temperature range.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to a denitrification catalyst and its preparation method and application. Background technique [0002] With the development of my country's economy, the treatment of flue gas nitrogen oxides in my country has entered all walks of life. The flue gas produced by the catalyst industry by decomposing nitrate precursors has an average temperature of 20-50 °C and has the characteristics of high concentration of nitrogen oxides. , making it difficult for the existing denitrification catalysts in my country to be applied in this industry. For example, because the commercial vanadium-tungsten-titanium catalyst is used at a temperature of 200-420°C, the flue gas needs to be heated up greatly, which consumes a lot of energy. At the same time, the commercial vanadium-tungsten-titanium catalyst also has the disadvantage of low efficiency in treating high-concentration flue gas n...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01D53/86B01D53/56
CPCB01J23/34B01D53/8628
Inventor 郭勇荣卫龙于洋宗可琦张舒乐盛守祥贾勇
Owner SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
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