TiO-supported vanadium-tungsten composite oxide monolithic catalyst for flue gas denitrification

A composite oxide and monolithic technology, which is applied in the control of catalytic selective reduction of nitrogen oxides, the preparation of the above-mentioned catalyst, the above-mentioned catalyst, and the field of fixed source or mobile source denitrification, which can solve the problem of huge equipment, high operating cost, and waste water generation. and other issues, to achieve the effect of good stability, strong moisture resistance and wide operating temperature

Inactive Publication Date: 2011-12-21
SHANGHAI NIUYI NEW ENERGY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet method is to use the solution to directly absorb NO X , the me

Method used

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  • TiO-supported vanadium-tungsten composite oxide monolithic catalyst for flue gas denitrification
  • TiO-supported vanadium-tungsten composite oxide monolithic catalyst for flue gas denitrification
  • TiO-supported vanadium-tungsten composite oxide monolithic catalyst for flue gas denitrification

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example one

[0029] Monolithic catalyst for denitration with varying active composition.

[0030] Contains γ-Al 2 O 3 Preparation of cordierite honeycomb ceramics. Weigh a certain amount of diaspore, add a certain proportion of urea or ammonia, dissolve it with a certain concentration of nitric acid solution, stir evenly, and then ball mill for 1-5 hours to obtain a certain concentration of γ-Al 2 O 3 Slurry. Immerse the pre-treated cordierite honeycomb ceramics in the prepared γ-Al 2 O 3 After immersing in the slurry for 1 to 5 minutes, take it out, blow out the remaining liquid in the pores, dry in the shade at 80-130°C for 2-10 hours, and then calcinate at 500°C for 2-8 hours to obtain a load of 10% γ-Al 2 O 3 Of cordierite honeycomb ceramic samples.

[0031] Load γ-Al 2 O 3 And TiO 2 Preparation of cordierite honeycomb ceramics. Dissolve a certain amount of tetrabutyl titanate or titanium ethylate in absolute ethanol, stir for 1-30 minutes, add a certain amount of conce...

Example Embodiment

[0035] Example two

[0036] The preparation method of the catalyst is the same as in Example 1. Γ-Al 2 O 3 And TiO 2 The content of V is varied within the range of 5-15 wt% and 5-10 wt%, and the TVW content of the monolithic destocking catalyst is 15%, and the molar ratio of V / Ti is 0.15.

[0037] The catalytic activity test is the same as in Example 1. The results show that the content changes of the two supports have little effect on the overall catalytic performance.

Example Embodiment

[0038] Example three

[0039] The preparation method of the catalyst is the same as in Example 1. Γ-Al 2 O 3 And TiO 2 The content of V-TW is adjusted to 10wt%, the content of the monolithic out-of-stock catalyst V-TW is 15wt%, and the molar ratio of V / Ti is 0.15.

[0040] The catalytic activity test was the same as in Example 1, and the reaction temperature was 150°C. Concentration of reaction tail gas: 35ppTiO, 0ppTi 2 O and 365ppTi 2 .

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Abstract

The invention relates to a titanium oxide-supported vanadium-tungsten composite oxide high-efficiency denitration integral catalyst and a preparation method thereof, and relates to a control technology for catalytic selective reduction of nitrogen oxides (NOx) in the fields of catalysis, environmental protection and energy saving. It is characterized in that the honeycomb cordierite ceramic material is used as the matrix, γ-Al2O3 is used as the first carrier, the Anatase crystal TiO2 is used as the second carrier, and the active components include V2O5-WO3 composite oxides as the active components. The contents of γ-Al2O3 and TiO2 are respectively 5-15wt% and 5-10wt%, V2O5-WO3 is 1-10wt%, and the V/W molar ratio is between 0-0.20. The monolithic catalyst of the present invention has a wide temperature window of 80-450 DEG C, the conversion rate of NOx by using NH3 as a reducing agent is not less than 85%, and the selectivity to N2 is more than 90%.

Description

technical field [0001] The invention relates to a titanium oxide-loaded vanadium-tungsten composite oxide high-efficiency denitrification monolithic catalyst and a preparation method thereof, and relates to a control technology for catalytically selective reduction of nitrogen oxides (NOx) in the fields of catalysis, environmental protection and energy saving. It is characterized by the honeycomb cordierite ceramic material as the matrix, and the γ-Al 2 o 3 As the first carrier, with Anatase crystal form TiO 2 As the second carrier, the active ingredient includes V 2 o 5 -WO 3 Composite oxides are active components. where γ-Al 2 o 3 and TiO 2 The contents are 5~15wt% and 5~10wt%, respectively, V 2 o 5 -WO 3 It is 1-10wt%, and the molar ratio of V / W is between 0-0.20. The monolithic catalyst of the present invention has a wide temperature window of 80-450°C, and NH 3 NO x The conversion rate is not less than 85%, for N 2 The selectivity is greater than 90%. [0...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01D53/86B01D53/56
Inventor 不公告发明人
Owner SHANGHAI NIUYI NEW ENERGY TECH
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