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Non-metal-doped de-nitration catalyst and preparation method thereof

A denitration catalyst and non-metal technology, applied in the field of denitration catalysts, can solve the problems of general engineering application prospects, poor water resistance of the catalyst, and the catalyst reaction temperature window has not been expanded, and achieves increased catalytic activity, good engineering application prospects, and widened The effect of the reaction temperature window

Active Publication Date: 2015-05-06
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent CN101352681A discloses a low-temperature SCR catalyst with nitrogen-doped activated carbon as the carrier and its preparation process. The patent increases the number of acid sites on the surface of the activated carbon carrier through the doping of oxides, thereby improving the catalytic performance of NH 3 The adsorption performance of the catalyst is improved by using nitrogen doping to increase the number of alkali sites on the surface of the activated carbon, which improves the adsorption performance of the catalyst for NO, and the adsorbed ammonia reacts with the adsorbed nitrogen to form N 2 、H 2 O, the catalyst has high low-temperature activity, but the catalyst resistance has not been involved; Li Yuntao et al. used fluorine-doped vanadium oxide / titanium oxide catalyst, and more low-valent titanium and vanadium were formed between vanadium and titanium through charge compensation, which improved In order to improve the redox performance of the catalyst, Zhang Tianjiao doped V by F, F / N 2 o 5 / TiO 2 Low-temperature denitrification catalyst improves the reaction rate and sulfur resistance of the catalyst, but there are problems such as poor water resistance of the catalyst and high reaction temperature (>200°C), the reaction temperature window of the catalyst has not been expanded, and can be applied in engineering Fair outlook

Method used

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  • Non-metal-doped de-nitration catalyst and preparation method thereof
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  • Non-metal-doped de-nitration catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0043] Preparation of non-metal doped denitrification catalyst

[0044] (1) Dry mixing: Take 10g NH 4 F, 32gCO(NH 2 ) 2 , 650gTiO 2 Powder, 28gFeC 2 o 4 2H 2 O, 282gMn(CH 3 COO) 2 4H 2 O, 151gCe(NO 3 ) 3 ·6H 2 O, 70gZr(NO 3 ) 4 ·5H 2 O, 32gNH 4 VO 3 , 120g glass fiber, 64g carboxymethyl cellulose, 50g stearic acid, put the above various solids together in a dry powder mixer and mix them for 15 minutes;

[0045] (2) Kneading: 130ml of water and 100ml of glycerin are added to the above mixture, and the kneading process is started for 30 minutes;

[0046] (3) Mud refining: pass the kneaded plastic material through a sieve plate or into a vacuum mud refining machine to remove excess water and gas in the material;

[0047] (4) Extrusion molding: the dense and uniform mud section obtained after mud refining enters the extruder, and is extruded by a honeycomb steel mold to obtain a catalyst green body;

[0048] (5) Drying and roasting: Dry at 60°C for 10 hours, hea...

Embodiment 2

[0050] Preparation of non-metal doped denitrification catalyst

[0051] (1) Dry mixing: take 41gNH 4 F, 43gCO(NH 2 ) 2 , 500gTiO 2 Powder, 56gFeC 2 o 4 2H 2 O, 564gMn(CH 3 COO) 2 4H 2 O, 126gCe(NO 3 ) 3 ·6H 2 O, 174gZr(NO 3 ) 4 ·5H 2 O, 19gNH 4 VO 3 , 150g glass fiber, 64g sodium carboxymethyl cellulose, 60g stearic acid; various solids are placed together in a dry powder mixer and mixed for 15 minutes;

[0052] (2) Kneading: Add 120ml of water and 120ml of glycerin to the above mixture, and start the kneading process for 20 minutes;

[0053] (3) Mud refining: pass the kneaded plastic material through a sieve plate or into a vacuum mud refining machine to remove excess water and gas in the material;

[0054] (4) Extrusion molding: the dense and uniform mud section obtained after mud refining enters the extruder, and is extruded by a honeycomb steel mold to obtain a catalyst green body;

[0055] (5) Drying and roasting: drying at 70°C for 8 hours, then heatin...

Embodiment 3

[0057] Preparation of non-metal doped denitrification catalyst

[0058] (1) Dry mixing: take 31gNH 4 F, 11gCO(NH 2 ) 2 , 600gTiO 2 Powder, 56gFeC 2 o 4 2H 2 O, 422gMn(CH 3 COO) 2 4H 2 O, 202gCe(NO 3 ) 3 ·6H 2 O, 35gZr(NO 3 ) 4 ·5H 2 O, 13gNH 4 VO 3 , 120g glass fiber, 64g sodium carboxymethylcellulose and 50g stearic acid. Mix all kinds of solids together in a dry powder mixer for 15 minutes;

[0059] (2) Kneading: Add 120ml of water and 128ml of glycerin to the above mixture, and start the kneading process for 30 minutes;

[0060] (3) Mud refining: pass the kneaded plastic material through a sieve plate or into a vacuum mud refining machine to remove excess water and gas in the material;

[0061] (4) Extrusion molding: the dense and uniform mud section obtained after mud refining enters the extruder, and is extruded by a honeycomb steel mold to obtain a catalyst green body;

[0062] (5) Drying and roasting: drying at 70°C for 8 hours, then heating up to 11...

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Abstract

The invention discloses a non-metal-doped de-nitration catalyst. The non-metal-doped de-nitration catalyst comprises a carrier and active components and also comprises non-metal F and N, wherein the carrier is TiO2; and the active components are Fe2O3, MnO2, CexOy, ZrO2 and V2O5. The invention also discloses a preparation method of the non-metal-doped de-nitration catalyst. The preparation method mainly comprises the following steps of carrying out dry-mixing raw materials, kneading, sieving with sieve plates, carrying out extrusion molding, drying and calcining. Since the de-nitration catalyst is doped with non-metal elements, the reaction temperature window of the catalyst is broadened, the catalytic activity of the catalyst is increased and in addition, the catalyst disclosed by the invention has better low temperature water resistance and good engineering application prospects.

Description

technical field [0001] The invention relates to the technical field of denitration catalysts, in particular to a non-metal doped denitration catalyst and a preparation method thereof, which are used for industrial flue gas NO x governance. Background technique [0002] Nitrogen oxides (NO x ) is the main pollutant that forms acid rain, photochemical smog, destroys the ozone layer, affects the ecological environment and global warming. In 2012, the total emission of nitrogen oxides in the country was 23.378 million tons. Through the implementation of energy conservation and emission reduction policies, the total emission in 2013 is expected to drop by more than 3.5%. Compared with 2013, the target total emission of nitrogen oxides in 2014 is It needs to be reduced by another 5%. In 2015, the total national nitrogen oxide emissions will be controlled at 20.462 million tons. Overall, the total emissions of nitrogen oxides are still huge, and the situation is still grim. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01D53/56B01D53/86
Inventor 王岳军刘伟莫建松戴仙兵刘学炎
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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