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Low-temperature denitration catalyst and preparation method thereof

A low-temperature denitrification and catalyst technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., to achieve excellent denitrification performance, improved anti-sulfur and anti-water poisoning ability, and high mechanical strength.

Pending Publication Date: 2021-08-03
南京宏硕环保新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a new type of low-temperature denitration catalyst in view of the current situation and existing problems of existing denitration catalyst research

Method used

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  • Low-temperature denitration catalyst and preparation method thereof

Examples

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Effect test

example 1

[0030] (1) Preparation of catalyst active component niobium manganese metal oxide precursor solution

[0031] Weigh 8.34g of niobium chloride and 5.52g of manganese nitrate solution, respectively add deionized water and stir to dissolve to a clear and transparent solution to obtain a niobium manganese metal oxide precursor solution;

[0032] (2) Preparation of co-catalyst precursor solution

[0033] Weigh 3.15g of barium hydroxide octahydrate, 21.7g of cerium nitrate hexahydrate, and 15.6g of ferric nitrate nonahydrate, add deionized water and stir to dissolve to a clear and transparent solution to prepare a co-catalyst precursor solution;

[0034] (3) Preparation of catalyst carrier

[0035] Weigh 60g of silica, fully ball mill, select silica between 1000-1200 mesh;

[0036] Weigh 100g titanium dioxide, 5g pseudo-boehmite, mix with the silicon dioxide powder prepared above, stir for 1 hour until uniform, titanium dioxide: silicon dioxide: pseudo-boehmite mass ratio is 1:0.6...

example 2

[0045] (1) Preparation of catalyst active component niobium manganese metal oxide precursor solution

[0046] Weigh 0.06g of niobium chloride and 64.76g of manganese acetate solution, respectively add deionized water and stir to dissolve to a clear and transparent solution to obtain a barium niobium manganese metal oxide precursor solution;

[0047] (2) Preparation of co-catalyst precursor solution

[0048] Weigh 0.58g barium hydroxide octahydrate, 043g lanthanum nitrate hexahydrate, 0.91g copper nitrate trihydrate, 0.81g ammonium molybdate, add deionized water and stir to dissolve to a clear and transparent solution to obtain a co-catalyst precursor solution;

[0049] (3) Preparation of catalyst carrier

[0050] Weigh 30g of silica, fully ball mill, select silica between 1000-1200 mesh;

[0051] Weigh 100g titanium dioxide, 10g pseudo-boehmite, mix with the silicon dioxide powder prepared above, stir for 2 hours until uniform, titanium dioxide: silicon dioxide: pseudo-boehm...

example 3

[0060] (1) Preparation of catalyst active component niobium manganese metal oxide precursor solution

[0061] Weigh 2.7g of niobium chloride and 35.79g of manganese nitrate solution, respectively add deionized water and stir to dissolve to a clear and transparent solution to obtain a barium niobium manganese metal oxide precursor solution;

[0062] (2) Preparation of co-catalyst precursor solution

[0063] Weigh 0.31g barium hydroxide octahydrate and 4.34g cerium nitrate hexahydrate, add an appropriate amount of deionized water and stir to dissolve to a clear and transparent solution to obtain a co-catalyst precursor solution;

[0064] (3) Preparation of catalyst carrier

[0065] Weigh 40g of silica, fully ball mill, select silica between 1000-1200 mesh;

[0066] Weigh 100g titanium dioxide, 10g pseudo-boehmite, mix with the silicon dioxide powder prepared above, stir for 1 hour until uniform, titanium dioxide: silicon dioxide: pseudo-boehmite mass ratio is 1:0.4:0.1 ;

[...

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Abstract

The invention relates to a low-temperature denitration catalyst and a preparation method thereof, and belongs to the field of air pollution control technologies and environment-friendly catalytic materials. Titanium dioxide, silicon dioxide and pseudo-boehmite are used as carriers, niobium-manganese composite metal oxide is used as a catalyst active component, and one or more of cerium oxide, lanthanum oxide, molybdenum oxide, iron oxide and copper oxide and barium oxide are used as co-catalysts. The preparation method comprises the following steps of: ball-milling silicon dioxide to 1000-1200 meshes, uniformly mixing the silicon dioxide with titanium dioxide, pseudo-boehmite, a proper amount of binder and deionized water, pugging, drying in the shade, extruding and carrying out primary calcination; and dipping a carrier in an active solution, sulfating, drying, and carrying out secondary calcination to obtain the monolithic low-temperature denitration catalyst. Compared with the prior art, the sulfur and water poisoning resistance of the catalyst is remarkably improved, the denitration effect is remarkable within the temperature range of 110-240 DEG C, and the mechanical strength is high. The catalyst is widely applicable to cement, steel, glass, chemical industry and other industries.

Description

technical field [0001] The invention relates to a novel low-temperature denitrification catalyst and a preparation method thereof, belonging to the fields of air pollution control technology and environmental protection catalytic materials. Background technique [0002] At present, the main flue gas NOx control technology is mainly based on the selective catalytic reduction (SCR) flue gas denitrification method. The vanadium titanium denitrification catalyst has been successfully commercialized and has obvious advantages at medium and high temperatures of 300°C-400°C. (CN102909003A), (CN102989467A), etc. However, the flue gas temperature in cement, steel, chemical and other industries is generally below 300°C, making it difficult to use commercial vanadium-titanium denitrification catalysts. [0003] In recent years, scholars at home and abroad have focused on the development of low-temperature denitration catalysts. For example, the patent (CN104801349A) tried to prepare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/34B01D53/86B01D53/56
CPCB01J23/8892B01J23/34B01J23/002B01D53/8628B01J2523/00B01J2523/25B01J2523/3712B01J2523/41B01J2523/47B01J2523/56B01J2523/72B01J2523/842B01J2523/17B01J2523/3706B01J2523/68
Inventor 祝社民李喜红陶兴军
Owner 南京宏硕环保新材料科技有限公司
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