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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: 2014-11-19
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 method for preparing a plate-type SCR denitration catalyst includes the steps of kneading, aging, stretch production of steel mesh, coating, and roasting. The kneading step includes the following processes:

[0040] The first mixing: 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 for mixing;

[0041] 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] Third mixing: After the second mixing, add 15 parts by weight of 15% (NH 3 The mass content of the ammonia water) is mixed into the mixture; after the third mixing, the pH va...

Embodiment 2

[0068] A method for preparing a plate-type SCR denitration catalyst includes the steps of kneading, aging, stretch production of steel mesh, coating, and roasting. The kneading step includes the following processes:

[0069] The first mixing: 420 parts by weight of titanium dioxide powder TiO 2 —W—1, 360 parts by weight of titanium dioxide powder TiO 2 —D-2, 60 parts by weight of deionized water, 40 parts by weight of 15% (mass content) ammonia, 40 parts by weight of ammonium heptamolybdate and 80 parts by weight of clay are added to the mixer for mixing;

[0070] Second mixing: After the first mixing, add 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 The mass content) of ammonia water is mixed into the mixture; after the third mixing, the p...

Embodiment 3

[0095] A method for preparing a plate-type SCR denitration catalyst includes the steps of kneading, aging, stretch production of steel mesh, coating, and roasting. The kneading step includes the following processes:

[0096] The first mixing: 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 for mixing;

[0097] Second mixing: After the first mixing, add 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] 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 mixing, measure th...

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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 preparation method and application of a catalyst, in particular to a preparation method and application of a catalyst for flue gas denitration. Background technique [0002] SCR (Selective Catalytic Reduction, Selective Catalytic Reduction) denitration catalyst is mainly used for the denitration treatment of flue gas; in the prior art, there is a composite flue gas denitration catalyst that can oxidize zero-valent mercury, its application number: 201110318071.2, application date : 2011.10.19, application publication number: CN 102350340 A, application publication date: 2012.02.15; the catalyst is a composite oxide V supported by TiO2 2 O 5 —CeO 2 —WO 3 / TiO 2 Or V 2 O 5 —CeO 2 —MO 3 / TiO 2 , Weight ratio; TiO 2 It is 75-100, V is 1-1.5, Ce is 1-5, W or Mo is 7.5-8.5. The preparation method is Ce(OH) 3 Deposited on nano-TiO 2 On top, it is impregnated with ammonium vanadate and ammonium tungstate / ammonium molybdate, dried and roast...

Claims

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Application Information

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Patent Type & Authority Patents(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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