Preparation method of anti-ammonium bisulfate flat plate type denitration catalyst and obtained catalyst

A technology of denitrification catalyst and ammonium bisulfate, which is applied in the field of selective catalytic reduction catalyst, which can solve the problems of poor catalyst wear resistance, reduced denitrification activity, and weak stability, and achieve low conversion rate and reduce the formation of ammonium bisulfate , Reduce the effect of ammonium bisulfate formation

Active Publication Date: 2021-06-18
DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation technology of the anti-ammonium bisulfate denitration catalyst disclosed in the above invention, the carrier is mixed with the active component and then calcined. In order to avoid the sintering of the active component and reduce the activity, the

Method used

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  • Preparation method of anti-ammonium bisulfate flat plate type denitration catalyst and obtained catalyst
  • Preparation method of anti-ammonium bisulfate flat plate type denitration catalyst and obtained catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0031]A kind of preparation method of anti-ammonium bisulfate plate type denitration catalyst, comprises the following steps:

[0032] ① Weigh anatase TiO according to the mass ratio of 8:2 2 , high-silicon ZSM-5 molecular sieve, placed in the mixing tank, add deionized water, attapulgite, hydroxypropyl cellulose and glass fiber in turn, wherein, SiO in the high-silicon ZSM-5 molecular sieve 2 / Al 2 o 3 The molar ratio is greater than 400, and the amount of attapulgite added is anatase TiO 2 And 1% of the total mass of high silicon ZSM-5 molecular sieve, hydroxypropyl cellulose is anatase TiO 2 and 1% of the total mass of high-silicon ZSM-5 molecular sieve, the amount of glass fiber added is anatase TiO 2 and 1% of the total mass of high-silicon ZSM-5 molecular sieves, kneaded for 2 hours to prepare a denitration catalyst paste;

[0033] ②Use a roller to coat the catalyst paste on the stainless steel mesh, and after punching, crimping, and drying, calcinate at 550°C for 5...

Embodiment 2

[0044] A kind of preparation method of anti-ammonium bisulfate plate type denitration catalyst, comprises the following steps:

[0045] ① Weigh anatase TiO according to the mass ratio of 9:1 2 , high silicon ZSM-5 molecular sieve, placed in the mixing tank, add deionized water, diatomaceous earth, hydroxymethyl cellulose and glass fiber successively, wherein, SiO in the high silicon ZSM-5 molecular sieve 2 / Al 2 o 3 The molar ratio is greater than 400, and the amount of diatomaceous earth added is anatase TiO 2 and 2% of the total mass of high silica ZSM-5 molecular sieve, hydroxymethyl cellulose is anatase TiO 2 and 2% of the total mass of high silicon ZSM-5 molecular sieve, the amount of glass fiber added is anatase TiO 2 and 2% of the total mass of high-silicon ZSM-5 molecular sieves, kneaded for 3 hours to obtain a denitration catalyst paste;

[0046] ②Use a roller to coat the catalyst paste on the stainless steel mesh, after punching, crimping, and drying, calcinate ...

Embodiment 3

[0057] A kind of preparation method of anti-ammonium bisulfate plate type denitration catalyst, comprises the following steps:

[0058] ① Weigh anatase TiO according to the mass ratio of 8.5:1.5 2 , high-silicon ZSM-5 molecular sieve, placed in the mixing tank, add deionized water, sepiolite, safflower powder and glass fiber successively, wherein, SiO in the high-silicon ZSM-5 molecular sieve 2 / Al 2 o 3 The molar ratio is greater than 400, and the amount of sepiolite added is anatase TiO 2 and 5% of the total mass of high-silicon ZSM-5 molecular sieves, the scallop powder is anatase TiO 2 and 2.5% of the total mass of high-silicon ZSM-5 molecular sieve, the amount of glass fiber added is anatase TiO 2 and 3% of the total mass of high-silicon ZSM-5 molecular sieves, and kneaded for 1 hour to obtain a denitration catalyst paste;

[0059] ②Use a roller to coat the catalyst paste on the stainless steel mesh, after punching, crimping, and drying, calcinate at 600°C for 3 hour...

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Abstract

The invention relates to the technical field of selective catalytic reduction catalysts, in particular to a preparation method of an anti-ammonium bisulfate flat plate type denitration catalyst and the obtained catalyst. According to the preparation method, a preparation process of firstly preparing the catalyst single plate for forming and then impregnating the active component is adopted, the catalyst single plate is calcined at a relatively high calcination temperature, the wear resistance of the catalyst is improved, the activity of the catalyst is ensured, the active component is mainly distributed on the surface of the paste material, the reaction area of SO2 on the monolithic catalyst is effectively reduced, and the SO2/SO3 conversion rate is reduced. A hydrophobic molecular sieve and a competitive adsorbent are also added, so that the adsorption of H2O in flue gas on the surface of the catalyst is reduced, the capture of SO2 is realized, the contact between SO2 and active components of the catalyst and the generation of SO3 are reduced, the SO2 reaction area is reduced, and the ammonium bisulfate resistance of the catalyst is improved.

Description

technical field [0001] The invention relates to the technical field of selective catalytic reduction catalysts, in particular to a preparation method of an ammonium bisulfate-resistant planar denitration catalyst and the obtained catalyst. Background technique [0002] It is well known that nitrogen oxides (NO x ) is a harmful gas and a major air pollutant, which can not only cause acid rain, photochemical smog, the greenhouse effect and the destruction of the ozone layer; Pollution is a serious hazard to human health. 90% SO in air pollutants 2 and 70% NO x From the combustion of coal, the energy structure dominated by coal leads to a high total amount of air pollutant emissions, and potential environmental problems continue to emerge. The NO emitted by industrial boilers and kilns (such as ceramic kilns, glass kilns) x It accounts for about 23% of the total nitrogen oxide emissions. [0003] At present, coal-fired power plants generally use selective catalytic reducti...

Claims

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Application Information

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IPC IPC(8): B01J29/16B01J29/48B01J35/00B01J35/02B01J37/02B01J37/08B01D53/86B01D53/56
CPCB01J29/48B01J37/0242B01J29/166B01J37/08B01J35/002B01J35/02B01D53/8628B01J2229/20Y02A50/20
Inventor 黄力王虎常峥峰王力腾纵宇浩高义博刘洋姚晔李金珂
Owner DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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