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Rare-earth modified SCR denitrification catalyst and preparation method therefor

A technology of denitrification catalyst and rare earth modification, applied in the field of denitrification catalyst, to achieve good adsorption capacity, good stability and stable lattice structure

Active Publication Date: 2015-10-28
北京晨晰环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems encountered in the actual use of high-temperature catalysts, the present invention provides a rare earth modified SCR denitration catalyst and a preparation method thereof, which have high nitrogen oxide removal activity in low-temperature environments

Method used

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  • Rare-earth modified SCR denitrification catalyst and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A rare earth modified SCR denitration catalyst, prepared from the following components in parts by weight

[0053] 20 parts of γ-alumina;

[0054]15 parts of nano-titanium dioxide;

[0055] 6 parts of cerium oxide;

[0056] 8 parts of lanthanum oxide;

[0057] 4 parts of yttrium oxide;

[0058] 15 parts of cross-linked chitosan;

[0059] 2 parts of white carbon black;

[0060] 3 parts talcum powder;

[0061] 3 parts of methyl silicone oil;

[0062] 2 parts bentonite;

[0063] Dolomite 3 parts;

[0064] 4 parts of α-cyanoacrylate;

[0065] 4 parts of polytetrafluoroethylene powder;

[0066] 3 parts polyethylene powder;

[0067] Tween-60 1 part;

[0068] 2 parts of sodium dodecylbenzenesulfonate;

[0069] Sodium polyoxyethylene ether sulfate 1 part.

[0070] The preparation process of the rare earth modified SCR denitration catalyst of the present invention is as follows:

[0071] (1) Take 20 parts of γ-alumina and 15 parts of nano-titanium dioxide, dry the...

Embodiment 2

[0082] A rare earth modified SCR denitration catalyst is prepared from the following components in parts by weight:

[0083] 25 parts of γ-alumina;

[0084] 18 parts of nano-titanium dioxide;

[0085] 7 parts of cerium oxide;

[0086] 9 parts of lanthanum oxide;

[0087] 5 parts of yttrium oxide;

[0088] 17 parts of cross-linked chitosan;

[0089] 3 parts of white carbon black;

[0090] 4 parts of talcum powder;

[0091] 3 parts of methyl silicone oil;

[0092] 5 parts of bentonite;

[0093] 6 parts of dolomite;

[0094] 4 parts of α-cyanoacrylate;

[0095] 6 parts of polytetrafluoroethylene powder;

[0096] 4 parts of polyethylene powder;

[0097] Tween-60 2 parts;

[0098] 2 parts of sodium dodecylbenzenesulfonate;

[0099] Sodium polyoxyethylene ether sulfate 4 parts.

[0100] The preparation process of the rare earth modified SCR denitration catalyst of the present invention is as follows:

[0101] (1) Take 25 parts of γ-alumina and 18 parts of nano-titaniu...

Embodiment 3

[0112] A rare earth modified SCR denitration catalyst is prepared from the following components in parts by weight:

[0113] 30 parts of γ-alumina;

[0114] 20 parts of nano titanium dioxide;

[0115] 12 parts of cerium oxide;

[0116] Lanthanum oxide 10 parts;

[0117] 8 parts of yttrium oxide;

[0118] 20 parts of cross-linked chitosan;

[0119] 4 parts of white carbon black;

[0120] 5 parts of talcum powder;

[0121] 4 parts of methyl silicone oil;

[0122] 7 parts of bentonite;

[0123] Dolomite 7 parts;

[0124] 5 parts of α-cyanoacrylate;

[0125] 7 parts of polytetrafluoroethylene powder;

[0126] 5 parts of polyethylene powder;

[0127] Tween-60 3 parts;

[0128] 3 parts of sodium dodecylbenzenesulfonate;

[0129] Sodium polyoxyethylene ether sulfate 5 parts.

[0130] The preparation process of the rare earth modified SCR denitration catalyst of the present invention is as follows:

[0131] (1) Take 30 parts of γ-alumina and 20 parts of nano-titanium diox...

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Abstract

The invention relates to a rare-earth modified SCR denitrification catalyst and a preparation method therefor, and belongs to the field of denitrification catalysts. The rare-earth modified SCR denitrification catalyst takes aluminum oxide and nano titanium dioxide as carriers and takes rare-earth oxide and cross-linked chitosan resin as active centers; and the prepared catalyst is low in price, good in chemical and thermal stability, relatively high in activity, high in anti-poisoning performance and long in service life. The preparation method for the rare-earth modified low-temperature SCR denitrification catalyst is simple, feasible and high in production efficiency; and raw materials are easily available.

Description

technical field [0001] The invention relates to a rare earth modified SCR denitration catalyst and a preparation method thereof, belonging to the field of denitration catalysts. Background technique [0002] With the development of my country's economy, my country's coal energy consumption and the number of motor vehicles have increased significantly, resulting in a rapid increase in the content of various pollutants in the air. After decades of hard work, my country has achieved some success in controlling dust and sulfur dioxide pollution, but nitrogen oxide pollution has not yet been controlled. Therefore, how to effectively control the emission of nitrogen oxides has become the focus of the current environmental protection field. [0003] For flue gas denitrification, the most mature technology in the world is based on NH 3 Selective Catalytic Reduction (SCR) as a reducing agent. This technology refers to using honeycomb ceramics as the carrier, using vanadium pentoxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J31/26B01J31/38B01J35/10B01D53/86B01D53/56
Inventor 杨公平赵艳军任谦牟海波张帅苗澍甘宁
Owner 北京晨晰环保工程有限公司
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