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Fume oxidation denitration catalyst prepared by sol-gel method and preparation process thereof

A technology of sol-gel method and denitration catalyst, which is applied in the field of flue gas oxidation denitration catalyst and its preparation, can solve the problems of poor denitration efficiency and high temperature, achieve good nitrogen oxide removal rate, low cost and simple equipment Effect

Active Publication Date: 2017-05-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature required for denitrification is high, and the denitrification efficiency is not good

Method used

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  • Fume oxidation denitration catalyst prepared by sol-gel method and preparation process thereof

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Effect test

Embodiment 1

[0040] A flue gas oxidation denitrification catalyst prepared by a sol-gel method, comprising the following components, by weight percentage: manganese oxides account for 24.52 wt%, zirconium oxides account for 20.29 wt%, and cerium oxides account for 41.65 wt% .

[0041] The preparation steps are as follows:

[0042] (1) 11.41g manganese acetate, 8.40g zirconium nitrate, 16.70g cerium nitrate were dissolved in 100ml deionized water to obtain metal salt solution;

[0043] (2) 4.80g polyethylene glycol (PEG400) and 48.03g citric acid are dissolved in 150ml deionized water, stirred to obtain a mixed solution;

[0044] (3) adding the metal salt solution in step (1) dropwise to the mixed solution in step (2), and stirring to obtain a reaction solution;

[0045] (4) Stir the reaction solution in an oil bath at 80°C until the sol forms a gel;

[0046] (5) Aging the gel obtained in step (4) at room temperature for 16 hours; drying at 65° C. for 14 hours; and roasting at 450° C. fo...

Embodiment 2

[0049] A flue gas oxidation denitrification catalyst prepared by a sol-gel method, comprising the following components, by weight percentage: manganese oxides account for 27.19wt%, zinc oxides account for 16.16wt%, cerium oxides account for 46.13wt% .

[0050] The preparation steps are as follows:

[0051] (1) 15.41g manganese acetate, 7.40g zinc nitrate, 14.70g cerium nitrate are dissolved in 100ml deionized water to obtain metal salt solution;

[0052] (2) 6.80g polyethylene glycol (PEG2000) and 40.03g citric acid were dissolved in 150ml deionized water, and stirred to obtain a mixed solution;

[0053] (3) adding the metal salt solution in step (1) dropwise to the mixed solution in step (2), and stirring to obtain a reaction solution;

[0054](4) Stir the reaction solution in an oil bath at 85°C until the sol forms a gel;

[0055] (5) Aging the gel obtained in step (4) at room temperature for 12 hours; drying at 65° C. for 14 hours; and roasting at 500° C. for 6 hours to ...

Embodiment 3

[0058] A flue gas oxidation denitrification catalyst prepared by a sol-gel method, comprising the following components, by weight percentage: manganese oxides account for 19.52 wt%, tin oxides account for 21.05 wt%, and cerium oxides account for 33.10 wt% .

[0059] The preparation steps are as follows:

[0060] (1) 18.41g manganese acetate, 6.40g tin nitrate, 12.70g cerium nitrate are dissolved in 100ml deionized water to obtain metal salt solution;

[0061] (2) 4.80g polyethylene glycol (PEG6000) and 48.03g citric acid were dissolved in 150ml deionized water, and stirred to obtain a mixed solution;

[0062] (3) adding the metal salt solution in step (1) dropwise to the mixed solution in step (2), and stirring to obtain a reaction solution;

[0063] (4) Stir the reaction solution in an oil bath at 70°C until the sol forms a gel;

[0064] (5) Aging the gel obtained in step (4) at room temperature for 16 hours; drying at 75° C. for 18 hours; and roasting at 500° C. for 4 hou...

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Abstract

The invention relates to a fume oxidation denitration catalyst prepared by a sol-gel method and a preparation process thereof. The catalyst is prepared from the following components in percentage by weight: 19-70 wt% of manganic oxide, 10-40 wt% of transition metal oxide and 10-60 wt% of cerium oxide. The preparation process comprises the steps: under the effect of polyethylene glycol and citric acid, performing sol-gel reaction of the soluble salt of manganese, the soluble salt of transition metal and the soluble salt of cerium; through aging, drying and calcining to obtain the fume oxidation denitration catalyst. The catalyst has the advantages that a required instrument for preparation is simple; the raw materials can be easily obtained; the cost is low; the activity under low temperature is good; the good nitrogen oxide removal rate and anti-water and anti-sulfur performances at 150-207 DEG C are maintained; the catalyst can be applied to the fume oxidation denitration of thermal power plants and industrial furnaces and the like.

Description

technical field [0001] The invention relates to a flue gas oxidation denitrification catalyst prepared by a sol-gel method and a preparation process thereof, belonging to the technical field of flue gas catalysis. Background technique [0002] As the country's control of nitrogen oxide emissions is becoming more and more stringent, in the treatment of power plant flue gas, simple low-nitrogen combustion technology cannot meet the requirements of the current emission standards, and denitrification treatment must be performed on the flue gas after combustion. Among the widely used dry denitrification methods, two methods, selective catalytic reduction (SCR) and oxidation, are now widely used. [0003] For the catalytic denitrification of flue gas in power plants, the SCR denitrification method has its limitations. This method reduces nitrogen monoxide to nitrogen and does not effectively utilize nitrogen monoxide. The SCR process layout is divided into two categories: high du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/889B01J37/03B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/34B01J23/8892B01J37/036B01J2523/00B01J2523/72B01J2523/48B01J2523/3712B01J2523/27B01J2523/43B01J2523/845
Inventor 杨延钊郭永华赵根源
Owner SHANDONG UNIV
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