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Plate-type SCR denitration catalyst, and preparation method and application thereof

A denitration catalyst, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as insufficient adhesion and plasticity, poor pore structure, etc.

Active Publication Date: 2013-10-16
江苏万德环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The shortcomings of the existing SCR denitration catalysts are: poor pore structure, insufficient adhesion and plasticity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of a plate-type SCR denitration catalyst, comprising the steps of kneading, aging, steel mesh stretching, coating and roasting, and the kneading step includes the following processes:

[0040] Mixing for the first time: 330 parts by weight of titanium dioxide powder TiO 2 —W—1,460 parts by weight of titanium dioxide powder TiO 2 -D-2, 40 parts by weight of deionized water, 50 parts by weight of 5% (mass content) ammonia, 55 parts by weight of ammonium heptamolybdate and 60 parts by weight of clay are added to the mixer and mixed;

[0041] The second mixing: after the first mixing, 280 parts by weight of titanium dioxide powder TiO 2 -W-1 and 240 parts by weight of titanium dioxide powder TiO 2 -D-2 and 40 parts by weight of deionized water are added to the mixture for further mixing;

[0042] The third mixing: after the second mixing, add 15 parts by weight of 15% (NH 3 mass content) of ammonia water into the mixture for mixing; after the third ...

Embodiment 2

[0068] A preparation method of a plate-type SCR denitration catalyst, comprising the steps of kneading, aging, steel mesh stretching, coating and roasting, and the kneading step includes the following processes:

[0069] Mixing for the first time: 420 parts by weight of titanium dioxide powder TiO 2 —W—1,360 parts by weight of titanium dioxide powder TiO 2 -D-2, the deionized water of 60 weight parts, the 15% (mass content) ammoniacal liquor of 40 weight parts, the ammonium heptamolybdate of 40 weight parts and the clay of 80 weight parts add in mixer and mix;

[0070] The second mixing: after the first mixing, 220 parts by weight of titanium dioxide powder TiO 2 -W-1 and 310 parts by weight of titanium dioxide powder TiO 2 -D-2 and 30 parts by weight of deionized water are added to the mixture for further mixing;

[0071] The third mixing: after the second mixing, add 20 parts by weight of 5% (NH 3 mass content) of ammonia water into the mixture for mixing; after the thir...

Embodiment 3

[0095] A preparation method of a plate-type SCR denitration catalyst, comprising the steps of kneading, aging, steel mesh stretching, coating and roasting, and the kneading step includes the following processes:

[0096] Mixing for the first time: 380 parts by weight of titanium dioxide powder TiO 2 —W—1,380 parts by weight of titanium dioxide powder TiO 2 -D-2, 50 parts by weight of deionized water, 45 parts by weight of 10% (mass content) ammonia, 50 parts by weight of ammonium heptamolybdate and 70 parts by weight of clay are added to the mixer and mixed;

[0097] The second mixing: after the first mixing, 250 parts by weight of titanium dioxide powder TiO 2 -W-1 and 250 parts by weight of titanium dioxide powder TiO 2 -D-2 and 35 parts by weight of deionized water are added to the mixture for further mixing;

[0098] The third mixing: after the second mixing, add 18 parts by weight of 10% (NH 3 mass content) of ammonia water into the mixture for mixing; after the third...

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Abstract

The invention discloses a plate-type SCR (Selective Catalytic Reduction) denitration catalyst, and a preparation method and the application thereof. The method comprises the following steps: kneading, aging, stretching production of a steel mesh, coating and baking, wherein in the kneading step, mixing step by step is adopted, that is TiO2-W-1, TiO2-D-2, deionized water, ammonia water, ammonium heptamolybdate, clay, an ammonium metavanadate solution, hydroxyethyl cellulose and polyethylene oxide are added into a mixer for kneading; the coating step is that the ageing material is uniformly coated on the stainless steel wire mesh. The invention further discloses the application of the catalyst in the field of gas denitration. The plate-type SCR denitration catalyst prepared by the method has higher mechanical strength and efficient denitration efficiency.

Description

technical field [0001] The invention relates to a catalyst preparation method and its application, in particular to a catalyst preparation method for flue gas denitrification and its application. Background technique [0002] SCR (Selective Catalytic Reduction, Selective Catalytic Reduction) denitrification catalyst is mainly used for denitrification treatment of flue gas; in the prior art, there is a composite flue gas denitrification catalyst capable of oxidizing zero-valent mercury, its application number: 201110318071.2, filing date : 2011.10.19, application publication number: CN 102350340 A, application publication date: 2012.02.15; the catalyst is a composite oxide V 2 o 5 —CeO 2 — WO 3 / TiO 2 or V 2 o 5 —CeO 2 —MO 3 / TiO 2 , weight ratio; TiO 2 75-100, V 1-1.5, Ce 1-5, W or Mo 7.5-8.5. The preparation method is to combine Ce(OH) 3 deposited on nano-TiO 2 It can also be obtained by impregnating a commercial SCR catalyst with cerium nitrate aqueous solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J37/04B01D53/90B01D53/56
Inventor 许德富于光喜许峰华杰颜少云
Owner 江苏万德环保科技有限公司
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