Copper-iron bimetal loaded monolithic denitration catalyst, and preparation method and application thereof

A denitration catalyst, copper-iron bimetal technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of copper-based molecular sieves, such as poor anti-sulfur ammonium salt poisoning ability and narrow active temperature range, etc. To achieve the effect of improving the resistance to ammonium sulfate poisoning, improving the denitration activity, and good application prospects

Pending Publication Date: 2020-04-03
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies such as the narrow active temperature range of the existing vanadium-titanium catalyst and the poor ability of copper-based molecular sieves to resist ammonium sulfate poisoning, and provide a simple process, high denitrification efficiency and anti-ammonium sulfate poisoning performance and Copper-iron bimetallic supported monolithic denitrification catalyst with strong alkali (earth) metal resistance, preparation method and application thereof

Method used

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  • Copper-iron bimetal loaded monolithic denitration catalyst, and preparation method and application thereof
  • Copper-iron bimetal loaded monolithic denitration catalyst, and preparation method and application thereof
  • Copper-iron bimetal loaded monolithic denitration catalyst, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0048] A copper-iron bimetallic supported monolithic denitrification catalyst, the components of which include, in parts by weight: 85 parts of cordierite ceramics, 18.6 parts of copper sulfate modified molecular sieves, and 37.1 parts of polyferric sulfate modified TiO 2 slurry, 34 parts aluminum sol and 4.3 parts PEG-400.

[0049] The preparation method of the above-mentioned copper-iron bimetallic supported monolithic denitration catalyst has the following steps:

[0050] (1) Preparation of copper sulfate modified molecular sieve

[0051] Add 3.3 parts of copper sulfate to 278.6 parts of deionized water for dissolution, then add 27.9 parts of ZSM-5 molecular sieve, keep it at 80°C for 8 hours, filter, dry, and roast at 600°C for 3 hours;

[0052] (2) Carrier pretreatment

[0053] Soak 85 parts of cordierite ceramics in sulfuric acid solution for 8 hours, rinse with deionized water until neutral, and dry;

[0054] (3) Coating TiO modified by polyferric sulfate 2 slurry ...

Embodiment 2

[0059] A copper-iron bimetallic supported monolithic denitration catalyst, the components of which include in parts by weight: 85 parts of cordierite ceramics, 17.7 parts of copper sulfate modified molecular sieves, and 28.4 parts of TiO modified by polyferric chloride 2 Slurry, 44 parts aluminum sol and 4.2 parts PEG-4000.

[0060] The preparation method of the above-mentioned copper-iron bimetallic supported monolithic denitration catalyst has the following steps:

[0061] (1) Preparation of copper sulfate modified molecular sieve

[0062] Add 4.7 parts of copper sulfate to 264.8 parts of deionized water for dissolution, then add 26.5 parts of Beta molecular sieves, heat at 90°C for 4 hours, filter, dry, and roast at 550°C for 5 hours;

[0063] (2) Carrier pretreatment

[0064] Soak 85 parts of cordierite ceramics in acetic acid solution for 8 hours, rinse with deionized water until neutral, and dry;

[0065] (3) Coating copper sulfate modified molecular sieve

[0066] A...

Embodiment 3

[0070] A copper-iron bimetallic supported monolithic denitration catalyst, the components of which include, in parts by weight: 78 parts of cordierite ceramics, 16.7 parts of copper sulfate modified molecular sieves, 22.4 parts of polysilicate ferric sulfate modified TiO 2 Slurry, 51 parts aluminum sol and 3.8 parts PEG-4000.

[0071] The preparation method of the above-mentioned copper-iron bimetallic supported monolithic denitration catalyst has the following steps:

[0072] (1) Preparation of copper sulfate modified molecular sieve

[0073] Add 5.9 parts of copper sulfate to 250.1 parts of deionized water for dissolution, then add 25.0 parts of SSZ-13 molecular sieves, heat at 100°C for 2 hours, filter, dry, and roast at 500°C for 6 hours;

[0074] (2) Carrier pretreatment

[0075] Soak 78 parts of cordierite ceramics in oxalic acid solution for 24 hours, rinse with deionized water until neutral, and dry;

[0076] (3) Coating polysilicate iron sulfate modified TiO 2 slu...

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Abstract

The invention belongs to the technical field of air pollution treatment technologies and environment-friendly catalyst materials, and particularly relates to a copper-iron bimetal loaded monolithic denitration catalyst, and a preparation method and an application thereof. Copper and iron bimetals in the obtained copper-iron bimetal loaded monolithic denitration catalyst have good synergistic catalysis effects, so that the denitration activity of the catalyst is improved, and the sulfur-ammonium salt poisoning resistance and the alkali (earth) metal poisoning resistance of the catalyst are improved. The denitration efficiency of the obtained catalyst at 250-540 DEG C is 85% or above, and the catalyst has good application prospects in the denitration direction of a moving source and the denitration direction of a fixed source.

Description

technical field [0001] The invention belongs to the technical fields of air pollution control technology and environmental protection catalyst material, and in particular relates to a copper-iron bimetallic supported monolithic denitrification catalyst, its preparation method and application. Background technique [0002] Nitrogen oxides (NO x ) is an important air pollutant. NO x The emissions of these pollutants have brought great harm to human production and life and the natural environment. NO x Not only will it cause acid rain, acid fog and photochemical smog, and promote global warming, but it will also cause an increase in nitrogen deposition, which will lead to eutrophication of surface water and acidification and poisoning of land, wetlands, and groundwater systems, further affecting land and Damage to aquatic systems. With the rapid development of the domestic economy, the energy structure dominated by coal has led to NO x The rapid increase of emissions has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/46B01J29/76B01J29/85B01D53/86B01D53/56
CPCB01J29/46B01J29/76B01J29/7615B01J29/85B01D53/8628B01D2258/0283B01J2229/186
Inventor 刘晓玲周振垒谢颂伟袁鹄孟凡民胡葆华周银波
Owner VALIANT CO LTD
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