Flue gas denitration catalyst and preparation method thereof

A denitrification catalyst and flue gas technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as catalyst wear, boiler matching difficulties, shorten catalyst service life, etc., and achieve good load and good catalysis Function, the effect of strong anti-sulfur poisoning performance

Inactive Publication Date: 2017-01-04
张进
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve this temperature, the flue gas denitrification reactor must be placed between the boiler economizer and the air preheater, so the catalyst will be washed and worn by high-concentration soot, and even high-temperature sintering will greatly shorten the service life of the catalyst; Furthermore, for most existing domestic boilers, the economizer, air preheater and boiler are assembled into one, and it is difficult to match this technology with the existing boilers

Method used

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  • Flue gas denitration catalyst and preparation method thereof
  • Flue gas denitration catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A flue gas denitrification catalyst, which uses glass fiber powder as a carrier, manganese acetate and potassium perchlorate (mass ratio: 1:0.5) are loaded as active components, and ferric oxide and cerium oxide (mass ratio: 1:1.5) are used as active ingredients. Co-catalyst; wherein, the mass ratio of active ingredient, co-catalyst and carrier is 1:5:58.

[0028] The preparation method of above-mentioned a kind of flue gas denitrification catalyst comprises steps:

[0029] (1) take ferric oxide, cerium oxide of formula quantity, mix uniformly, obtain mixed powder;

[0030] (2) manganese acetate and potassium perchlorate of formula quantity are dissolved in deionized water, obtain aqueous solution;

[0031] (3) mixing the mixed powder obtained in step (1) with the aqueous solution obtained in step (2), and stirring evenly to obtain a mixed slurry;

[0032] (4) Add activated glass fiber powder to the mixed slurry, stir for 12 hours, dry at 80° C. for 5 hours, and calci...

Embodiment 2

[0034] A flue gas denitrification catalyst, which uses glass fiber powder as a carrier, manganese acetate and potassium perchlorate (mass ratio: 1:2) as active components, and ferric oxide and cerium oxide (mass ratio: 1:3) as active components. Co-catalyst; wherein, the mass ratio of active ingredient, co-catalyst and carrier is 1:12:75.

[0035] The preparation method of above-mentioned a kind of flue gas denitrification catalyst comprises steps:

[0036] (1) take ferric oxide, cerium oxide of formula quantity, mix uniformly, obtain mixed powder;

[0037] (2) manganese acetate and potassium perchlorate of formula quantity are dissolved in deionized water, obtain aqueous solution;

[0038] (3) mixing the mixed powder obtained in step (1) with the aqueous solution obtained in step (2), and stirring evenly to obtain a mixed slurry;

[0039] (4) Add activated glass fiber powder to the mixed slurry, stir for 15 hours, dry at 130°C for 8 hours, and calcined at 430°C for 45 hours...

Embodiment 3

[0041] A flue gas denitrification catalyst, which uses glass fiber powder as a carrier, manganese acetate and potassium perchlorate (mass ratio: 1:0.5) are loaded as active components, and ferric oxide and cerium oxide (mass ratio: 1:1.5) are used as active ingredients. The co-catalyst, in addition, also includes hydroxypropyl methylcellulose; wherein, the mass ratio of active ingredient, co-catalyst, carrier and hydroxypropyl methyl cellulose is 1:5:58:2.

[0042] The preparation method of above-mentioned a kind of flue gas denitrification catalyst comprises steps:

[0043] (1) take ferric oxide, cerium oxide and hydroxypropyl methylcellulose of formula quantity, mix uniformly, obtain mixed powder;

[0044] (2) manganese acetate and potassium perchlorate of formula quantity are dissolved in deionized water, obtain aqueous solution;

[0045] (3) mixing the mixed powder obtained in step (1) with the aqueous solution obtained in step (2), and stirring evenly to obtain a mixed s...

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Abstract

The invention discloses a flue gas denitration catalyst and a preparation method thereof. The catalyst takes fiberglass powder as a carrier, manganese acetate and potassium perchlorate loaded by the fiberglass powder are taken as active ingredients, and ferroferric oxide and cerium oxide are taken as promoters; the mass ratio of the active ingredients, the promoters and the carrier is 1:(5-12):(58-75). According to the flue gas denitration catalyst, the denitration rate is high, the service life is long, the active temperature window is wide, and the sulfur poisoning resistance is high. Specifically, the NO conversion rate of the flue gas denitration catalyst can reach 95% or above in the temperature range of 90-300 DGE C, the high NO conversion rate can be maintained after the catalyst is used by 16 hours, the catalytic activity is only weakened slightly, and the catalyst has high sulfur poisoning resistance.

Description

technical field [0001] The invention relates to a catalyst, in particular to a flue gas denitrification catalyst and a preparation method thereof. The invention belongs to the technical field of flue gas denitrification. Background technique [0002] Nitrogen oxides are one of the main air pollutants, which can cause acid rain, photochemical smog, eutrophication of surface water and other problems that damage the ecological environment and endanger human health. Nitrogen oxide emissions from coal-fired power plants account for about half of my country's total emissions. Therefore, it is extremely urgent to control NOx emissions from coal-fired power plants. At present, technologies for controlling NOx emissions from coal-fired power plants mainly include: reburning, selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR). Strict national standards for NOx emissions. [0003] Catalyst is the core of SCR technology, and its cost accounts for a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01D53/86B01D53/56
CPCB01J31/28B01D53/8628B01D2258/0283
Inventor 张进
Owner 张进
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