MnOx-FeOx-CuSO4/TiO2 medium-low temperature SCR catalyst and preparation method thereof

An SCR catalyst, mnox-feox-cuso4 technology, applied in the field of denitration catalyst, can solve the problems of pollution, toxicity, restrict the development of nitrogen oxide emission reduction work, etc., to achieve the effect of increasing the specific surface area and facilitating the adsorption capacity

Inactive Publication Date: 2018-04-20
SHENZHEN JINGTE INTELLIGENT MFG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most widely used commercially today is the V 2 o 5 /TiO 2 It is a catalyst, its denitrification rate can reach more than 90% in industrial application, but it is only limited to the high temperature activity window (≥350°C), and V 2 o 5 Toxic, will produce pollution during production, use and disposal
[0004] At present, the low-temperature SCR denitrification catalyst widely

Method used

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  • MnOx-FeOx-CuSO4/TiO2 medium-low temperature SCR catalyst and preparation method thereof
  • MnOx-FeOx-CuSO4/TiO2 medium-low temperature SCR catalyst and preparation method thereof
  • MnOx-FeOx-CuSO4/TiO2 medium-low temperature SCR catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1:

[0025] (1) Ingredients by weight percentage: 0.1kg cetyltrimethylammonium bromide, 0.6kg tetrabutyl titanate, 6.8kg anhydrous ethanol, CuSO 4 ·5H 2 O 0.4kg, Mn(Ac) 2 ·4H 2 O 0.5kg, Fe(NO 3 ) 3 ·9H 2 O 0.1kg, deionized water 1.5kg;

[0026] (2) After mixing cetyltrimethylammonium bromide, tetrabutyl titanate, and absolute ethanol, adjust the pH of the solution to 5 with glacial acetic acid, and then vigorously stir the above mixture for 1 hour to prepare a Ti precursor sol ;

[0027] (3) Put CuSO 4 ·5H 2 O was added to the Ti precursor sol in step (2) and stirred, and the pH of the solution was adjusted to 4 with glacial acetic acid, and then fully stirred for 2 hours under the protection of nitrogen to prepare CuSO 4 / Ti precursor sol;

[0028] (4) Mn(Ac) 2 ·4H 2 O, Fe(NO 3 ) 3 ·9H 2 O. Deionized water was added to the product of step (3) in sequence, and stirring was continued for 2 hours under the protection of nitrogen. The resulting mixture was poured into a be...

Example Embodiment

[0031] Example 2:

[0032] (1) Ingredients in percentage by weight: 0.5kg cetyltrimethylammonium bromide, 8kg tetrabutyl titanate, 63 kg anhydrous ethanol, CuSO 4 ·5H 2 O 5kg, Mn(Ac) 2 ·4H 2 O 2kg, Fe(NO 3 ) 3 ·9H 2 O 1.5kg, deionized water 20kg;

[0033] (2) After mixing cetyltrimethylammonium bromide, tetrabutyl titanate, and absolute ethanol, adjust the pH of the solution to 5 with glacial acetic acid, and then vigorously stir the above mixture for 1.5 hours to prepare a Ti precursor Sol

[0034] (3) Put CuSO 4 ·5H 2 O was added to the Ti precursor sol in step (2) and stirred, and the pH of the solution was adjusted to 4 with glacial acetic acid, and then fully stirred for 3 hours under the protection of nitrogen to prepare CuSO 4 / Ti precursor sol;

[0035] (4) Mn(Ac) 2 ·4H 2 O, Fe(NO 3 ) 3 ·9H 2 O. Deionized water was added to the product of step (3) in sequence, and stirring was continued for 3 hours under the protection of nitrogen. The resulting mixture was poured into a beake...

Example Embodiment

[0038] Example 3:

[0039] (1) Ingredients in percentage by weight: 1.5 kg of cetyl trimethyl ammonium bromide, 10 kg of tetrabutyl titanate, 52.5 kg of absolute ethanol, CuSO 4 ·5H 2 O 6kg, Mn(Ac) 2 ·4H 2 O 3kg, Fe(NO 3 ) 3 ·9H 2 O 2kg, deionized water 25kg;

[0040] (2) After mixing cetyltrimethylammonium bromide, tetrabutyl titanate, and absolute ethanol, adjust the pH of the solution to 5 with glacial acetic acid, and then vigorously stir the above mixture for 2 hours to prepare a Ti precursor sol ;

[0041] (3) Put CuSO 4 ·5H 2 O was added to the Ti precursor sol in step (2) and stirred, and the pH of the solution was adjusted to 4 with glacial acetic acid, and then fully stirred for 3 hours under the protection of nitrogen to prepare CuSO 4 / Ti precursor sol;

[0042] (4) Mn(Ac) 2 ·4H 2 O, Fe(NO 3 ) 3 ·9H 2 O, deionized water was added to the product of step (3) in sequence, and stirring was continued for 4 hours under the protection of nitrogen. The resulting mixture was poured...

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Abstract

The invention discloses an MnOx-FeOx-CuSO4/TiO2 medium-low temperature SCR catalyst and a preparation method thereof. The preparation method comprises the following steps of: (1) mixing hexadecyl trimethyl ammonium bromide, tetrabutyl titanate and anhydrous ethanol, and adjusting the pH value of the mixed solution with glacial acetic acid to prepare a Ti precursor sol; (2) adding the prepared Ti precursor sol into CuSO4.5H2O, continuing to adjust the pH value of the obtained solution with glacial acetic acid, and performing stirring under the protection of nitrogen to obtain a main active substance load; and (3) adding Mn(Ac)2.4H2O, Fe(NO3)3.9H2O and deionized water into the main active substance load sequentially, continuing to stir the obtained mixed liquid, then aging the mixed liquid in a water bath, and performing drying and calcining to obtain the finished catalyst product. The SCR catalyst prepared by using the preparation method has high activity of denitration at medium-low temperatures of 200-350 DEG C, can adapt to requirements of practical industrial application, and has a very broad prospect of industrial application.

Description

technical field [0001] The invention belongs to the technical field of denitrification catalysts, in particular to a MnOx-FeOx-CuSO 4 / TiO 2 Medium and low temperature SCR catalyst and preparation method thereof. Background technique [0002] In recent years, smog and smog have appeared frequently in various parts of our country, and the air pollution situation is severe. The pollution caused by nitrogen oxides (NOx) is particularly serious. Facing the increasingly serious air pollution problem, the control and emission reduction of nitrogen oxides must be accelerated How to quickly and effectively reduce NOx emissions has become an important task at present. [0003] Selective catalytic reduction denitrification technology (SCR) mainly uses NH 3 , urea, etc. as reducing agents, reducing NOx to non-toxic and harmless product N 2 and H 2 O. The most widely used commercially today is the V 2 o 5 / TiO 2 It is a catalyst, its denitrification rate can reach more than 90%...

Claims

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Application Information

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IPC IPC(8): B01J27/055B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J27/055
Inventor 冯林
Owner SHENZHEN JINGTE INTELLIGENT MFG TECH CO LTD
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