High-efficient denitration monolithic catalyst for titanium oxide carried vanadium-molybdenum composite oxide

A catalyst and integrated technology, applied in the control of catalytic selective reduction of nitrogen oxides, the preparation of the above catalyst, the above catalyst, fixed source or mobile source denitrification field, to achieve strong sulfur resistance, wide use temperature, and good stability Effect

Active Publication Date: 2013-06-19
上海复翼环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet method uses a solution to directly absorb NOx. This method has a large device, high operating costs, and produces waste water.

Method used

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  • High-efficient denitration monolithic catalyst for titanium oxide carried vanadium-molybdenum composite oxide
  • High-efficient denitration monolithic catalyst for titanium oxide carried vanadium-molybdenum composite oxide
  • High-efficient denitration monolithic catalyst for titanium oxide carried vanadium-molybdenum composite oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[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 water, dissolve it with a certain concentration of nitric acid solution, stir it evenly, and ball mill it for 1 to 5 hours to obtain a certain concentration of γ-Al 2 o 3 slurry. The pre-treated cordierite honeycomb ceramics were impregnated in the prepared γ-Al 2 o 3 In the slurry, take it out after immersing for 1-5 minutes, blow off the residual liquid in the channel, dry in the shade and dry at 80-130°C for 2-10 hours, and then bake at 500°C for 2-8 hours to obtain 10% γ-Al loading 2 o 3 cordierite honeycomb ceramic samples.

[0031]Loaded γ-Al 2 o 3 and TiO 2 Preparation of cordierite honeycomb ceramics. Dissolve a certain amount of tetrabutyl titanate or titanium ethoxide in absolute ethanol, stir for 1 to 30 minutes, add a certain amount of concentrated nitric acid, then add ethanol / water solution, and stir v...

Embodiment 2

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

[0038] Embodiment three

Embodiment 3

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

[0041] Embodiment four

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Abstract

The invention relates to a titanium oxide-loaded vanadium-molybdenum composite oxide high-efficiency denitrification monolithic 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, the γ-Al2O3 is used as the first carrier, the Anatase crystal form TiO2 is used as the second carrier, and the active component includes V2O5-MoO3 composite oxide as the active component. Wherein the contents of γ-Al2O3 and TiO2 are respectively 5-15wt% and 5-10wt%, V2O5-MoO3 is 1-10wt%, and the molar ratio of V / Mo is between 0-0.20. In the wide temperature window of 80-450 DEG C, the monolithic catalyst of the present invention uses NH3 as the reducing agent to convert NOx to not less than 85%, and the selectivity to N2 is greater than 90%.

Description

technical field [0001] The invention relates to a titanium oxide-loaded vanadium-molybdenum composite oxide high-efficiency denitrification monolithic 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 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 -MoO 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 -MoO 3 It is 1-10wt%, and the molar ratio of V / Mo 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%. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28B01J37/02B01D53/86B01D53/56
Inventor 不公告发明人
Owner 上海复翼环保科技有限公司
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