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Flat-plate scr denitrification catalyst for high-temperature flue gas and preparation method thereof

A denitration catalyst, high temperature flue gas technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low upper limit of catalyst temperature, poor denitration activity, etc. The effect of saving operating costs and reducing mechanical properties

Active Publication Date: 2021-03-19
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the technical problem of low upper limit of catalyst temperature for SCR denitrification and poor denitrification activity at high temperature in the prior art, and provides a flat-plate SCR denitrification catalyst for high temperature flue gas and a preparation method thereof. The catalyst is thermally stable at high temperature Strong, with excellent high temperature denitrification performance

Method used

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  • Flat-plate scr denitrification catalyst for high-temperature flue gas and preparation method thereof

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preparation example Construction

[0033] In order to better realize the above-mentioned technical scheme, the present invention also provides a preparation method of a flat-plate SCR denitration catalyst for high-temperature flue gas, and the specific steps include:

[0034] S1. TiO 2 -Y 2 o 3 -γ-Al 2 o 3 Preparation of Composite Nanocarriers

[0035] Dissolve titanium tetrachloride in water at 10°C to obtain a titanium tetrachloride solution, add monoglyceride stearate into the titanium tetrachloride solution and stir evenly, and adjust the pH value of the solution to 6.5-7.5 with ammonia water with a volume concentration of 30%. , heat the solution to 50°C to hydrolyze titanium to obtain a uniform white emulsion; add acetic acid solution of yttrium nitrate and aluminum trichloride solution to the solution in turn, stir evenly, adjust the pH value of the solution to 9-10 with ammonia water, and then Stir continuously at 85°C for 2 to 4 hours; filter to obtain the hydrolyzed precipitate, wash it with etha...

Embodiment 1

[0045] This embodiment provides a flat-plate SCR denitration catalyst for high-temperature flue gas and its preparation method. The specific steps include:

[0046] (1) TiO 2 -Y 2 o 3 -γ-Al 2 o 3 Preparation of Composite Nanocarriers

[0047] Dissolve 1896.8g titanium tetrachloride with 20L water respectively, 295mL water dissolve 169.64g yttrium nitrate hexahydrate and 0.89g acetic acid, 1.96L water dissolve 392.18g aluminum trichloride, obtain titanium solution, yttrium solution and aluminum solution; Add 38.1g of monoglyceride stearate to the solution, adjust the pH value of the solution to 6.5 with ammonia water, and then heat the solution to 50°C to hydrolyze the titanium solution to obtain a uniform white emulsion; add the yttrium solution and the aluminum solution to the emulsion in turn, Adjust the pH value of the solution to 9, heat the solution to 85°C and continue to stir for 2h; filter to obtain a hydrolyzed precipitate, wash with ethanol and deionized water, ...

Embodiment 2

[0054] Example 2 also describes a flat-plate SCR denitration catalyst for high-temperature flue gas and its preparation method. The specific steps include:

[0055] (1) TiO 2 -Y 2 o 3 -γ-Al 2 o 3 Preparation of Composite Nanocarriers

[0056] Dissolve 1896.8g titanium tetrachloride with 20L water respectively, dissolve 509.47g yttrium nitrate hexahydrate and 2.67g acetic acid with 887mL water, dissolve 130.67g aluminum trichloride with 327mL water, obtain titanium solution, yttrium solution and aluminum solution; Add 107.57g of monoglyceride stearate, adjust the pH value of the solution to 7.5 with ammonia water, and then heat the solution to 50°C to hydrolyze the titanium solution to obtain a uniform white emulsion; add the yttrium solution and aluminum solution to the emulsion in turn, adjust The pH value of the solution was 10, heated the solution to 85°C and continued to stir for 4h; filtered to obtain a hydrolyzed precipitate, washed with ethanol and deionized water,...

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Abstract

The embodiment of the present invention provides a flat-plate SCR denitration catalyst for high-temperature flue gas and a preparation method thereof. The catalyst is TiO 2 ‑Y 2 O 3 ‑γ‑Al 2 O 3 The composite nano-oxide is used as the carrier, tungsten trioxide is the active ingredient, cerium sulfate is the active additive, structural additives composed of organic and inorganic components are added, and it is made through a roller coating process. The catalyst of the present invention improves high-temperature denitration performance by developing high thermal stability and high specific surface area carriers, optimizing active components and active additives, optimizing preparation processes, etc., so that the catalyst has excellent performance in the temperature range of 500 to 750°C. Denitrification activity and thermal stability. The glass fiber in the structural additives can significantly improve the adhesion performance of the flat catalyst, the montmorillonite can significantly improve the wear resistance of the catalyst, and the Al contained in the carrier 2 O 3 The ingredients can also significantly improve the wear resistance of the catalyst, giving the catalyst good mechanical properties, reducing the frequency of catalyst replacement, and saving the operating costs of SCR denitration.

Description

technical field [0001] The invention belongs to the technical fields of environmental protection technology and denitrification catalysis, and in particular relates to a flat-plate SCR denitrification catalyst for high-temperature flue gas. The invention also provides a preparation method of the flat-plate SCR denitration catalyst for high-temperature flue gas. Background technique [0002] In recent years, the country's attention to environmental pollution has gradually increased, and policies and indicators for the discharge of various pollutants in different industries have been promulgated one after another. NO as one of the main pollutants emitted by industrial boilers x It can cause photochemical smog, acid rain, greenhouse effect, ozone layer destruction and many other environmental problems, so NO x Emissions have already been regulated by the state. [0003] SCR (Selective Catalytic Reduction, Selective Catalytic Reduction) denitrification technology is currently...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J27/053B01J35/02B01J35/10B01J37/00B01D53/86B01D53/56B01J35/00
CPCB01J37/0009B01J37/0018B01J23/10B01J27/053B01J23/002B01D53/8628B01J2523/00B01J35/00B01J35/30B01J35/60B01J2523/31B01J2523/36B01J2523/47
Inventor 陆强吴洋文徐明新王涵啸吴亚昌刘吉
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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