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High-strength honeycomb type low-temperature SCR denitration catalyst and preparation method thereof

A denitrification catalyst and honeycomb technology, which is applied in the field of high-strength honeycomb low-temperature SCR denitrification catalyst and its preparation, can solve the problems of poor low-temperature activity and prone to sulfur poisoning mechanical properties, and achieve improved low-temperature activity, significant catalytic decomposition, The effect of enhancing the wear strength

Pending Publication Date: 2021-06-18
华电光大(辽阳)节能环保技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-strength honeycomb low-temperature SCR denitrification catalyst and its preparation method, which can solve the problems of poor low-temperature activity, easy occurrence of sulfur poisoning and poor mechanical properties of existing commercial honeycomb low-temperature SCR denitrification catalysts. Poor technical problems, can significantly improve the mechanical properties, low-temperature activity and anti-poisoning performance of the catalyst

Method used

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  • High-strength honeycomb type low-temperature SCR denitration catalyst and preparation method thereof
  • High-strength honeycomb type low-temperature SCR denitration catalyst and preparation method thereof

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Experimental program
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Embodiment 1

[0028] Embodiment 1: a kind of preparation method of high-strength honeycomb low-temperature SCR denitration catalyst comprises the following steps:

[0029] (1) Dry-mix 545g of titanium dioxide, 300g of alumina and 23g of glass fiber filaments (50mm in length, 2μm in diameter) in a powerful mixer, and evenly disperse the glass fiber filaments into the powder for 1h of mixing time;

[0030] (2) 38.6g ammonium metavanadate is dissolved in 80ml water, 146.9g ammonium heptamolybdate is dissolved in 340ml water, 10.3g antimony acetate is dissolved in 40ml water, and above-mentioned solution is joined in the mixed material of step (1), Then stir evenly, stirring time 2h;

[0031] (3) Add 25g pseudo-boehmite, 10g kaolin, 12g carboxymethyl cellulose, 2g polyacrylamide, 3g polyethylene oxide and 8ml glycerol successively in the mixed material of step (2), the mixing temperature is 60°C, Mixing time 1h;

[0032] (4) 20ml of 1mol / L nitric acid solution is added to the mixed material i...

Embodiment 2

[0037] Embodiment 2: a kind of preparation method of high-strength honeycomb low-temperature SCR denitration catalyst, comprises the following steps:

[0038] (1) Dry-mix 470g of titanium dioxide, 360g of alumina and 20g of glass fiber filaments (60mm in length, 3μm in diameter) in a powerful mixer, and evenly disperse the glass fiber filaments into the powder for 1h of mixing time;

[0039] (2) 64g ammonium metavanadate is dissolved in 100ml water, 122.5g ammonium heptamolybdate is dissolved in 250ml water, 41g antimony acetate is dissolved in 110ml water, and above-mentioned solution is added in the mixed material of step (1), then stir Evenly, stirring time 3h;

[0040] (3) Add 22g pseudo-boehmite, 8g kaolin, 10g carboxymethyl cellulose, 3g polyacrylamide, 2g polyethylene oxide and 10ml glycerol successively in the mixed material of step (2), the mixing temperature is 70°C, Mixing time 2h;

[0041](4) The nitric acid solution of 15ml 2mol / L is added to the mixed material ...

Embodiment 3

[0046] Embodiment 3: a kind of preparation method of high-strength honeycomb low-temperature SCR denitration catalyst comprises the following steps:

[0047] (1) Dry-mix 540g of titanium dioxide, 300g of alumina and 18g of glass fiber filaments (55mm in length, 2μm in diameter) in a powerful mixer, and evenly disperse the glass fiber filaments into the powder for 1h of mixing time;

[0048] (2) 51.4g ammonium metavanadate is dissolved in 120ml water, 98g ammonium heptamolybdate is dissolved in 190ml water, 82g antimony acetate is dissolved in 160ml water, and above-mentioned solution is added in the mixed material of step (1), then stir Evenly, stirring time 3h;

[0049] (3) Add 23g pseudo-boehmite, 9g kaolin, 9g carboxymethyl cellulose, 2g polyacrylamide, 4g polyethylene oxide and 15ml glycerol successively in the mixed material of step (2), mixing temperature 65 ℃, Mixing time 2h;

[0050] (4) The nitric acid solution of 12ml 3mol / L is added to the mixed material in step (...

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Abstract

The invention relates to a high-strength honeycomb type low-temperature SCR denitration catalyst and a preparation method thereof, and belongs to the technical field of environment protection and denitration catalysts. The preparation method comprises the following steps: mixing an aluminum oxide and titanium dioxide carrier, an active component solution, an auxiliary agent solution, glass fiber filaments, pseudo-boehmite, kaolin, carboxymethylcellulose, polyacrylamide, polyoxyethylene and glycerol, adding a nitric acid solution, aging, molding by a vertical hydraulic extruder, and finally drying and roasting to obtain the high-strength honeycomb type low-temperature SCR denitration catalyst. The obtained honeycomb type low-temperature catalyst has very strong mechanical property, low-temperature activity and sulfur poisoning resistance, and the removal rate of nitrogen oxides is greater than 90% under the flue gas conditions that the temperature is 120-150 DEG C and the SO2 concentration is 4000 mg / m<3>.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and denitrification catalysis, and in particular relates to a high-strength honeycomb low-temperature SCR denitrification catalyst and a preparation method thereof. Background technique [0002] The combustion of fuels such as coal, oil, natural gas, and biomass will produce atmospheric pollutants such as nitrogen oxides (NOx), which are seriously harmful to the environment and human beings. As people's awareness of environmental protection continues to increase, my country's nitrogen oxide emission standards have become increasingly stringent. [0003] Nitrogen oxide control technologies can be mainly classified into three categories: denitrification before combustion, denitrification during combustion, and denitrification after combustion. Denitrification before combustion refers to denitrification of fuel, and denitrification during combustion refers to reducing the production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J35/04B01D53/86B01D53/56
CPCB01J23/002B01J23/28B01D53/8628B01J2523/00B01J35/56B01J2523/31B01J2523/47B01J2523/53B01J2523/55B01J2523/68
Inventor 陈晨刘丁嘉曲艳超
Owner 华电光大(辽阳)节能环保技术有限公司
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