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

A composite oxide and integral technology is applied in the preparation of the above-mentioned catalysts, the denitration of fixed sources or mobile sources, and the control of catalytic selective reduction of nitrogen oxides. and other problems, to achieve the effect of high out-of-stock efficiency and high selectivity

Active Publication Date: 2011-11-23
上海复翼环保科技有限公司
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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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  • 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

Example Embodiment

[0028] Embodiment one

[0029] Monolithic catalysts for denitrification 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 water, dissolve it with a certain concentration of nitric acid solution, stir it evenly, and then 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 soaking for 1-5min, blow off the residual liquid in the channel, dry in the shade and then dry at 80-130°C for 2-10h, and then bake at 500°C for 2-8h 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 m...

Example Embodiment

[0035] Embodiment two

[0036] The preparation method of the catalyst is the same as in Example 1. γ-Al 2 o 3 and TiO 2 The contents of V / Mn are varied in the range of 5-15wt% and 5-10wt%, respectively, and the content of TVMO of monolithic de-sales catalyst is 15%, and the molar ratio of V / Mn is 0.15.

[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.

Example Embodiment

[0038] Embodiment 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-TMO is adjusted to 10wt%, the content of V-TMO is 15wt%, and the molar ratio of V / Mn 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: 35ppmNO, 0ppmN 2 O and 365ppmN 2 .

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Abstract

The invention relates to a high-efficient denitration monolithic catalyst for titanium oxide carried vanadium-molybdenum composite oxide and a preparation method thereof, and relates to a technology for controlling selective catalytic reduction of nitrogen oxide (NOx) in the fields of catalysis, environmental protection and energy saving. The preparation method provided by the invention is characterized in that a honeycomb cordierite ceramic material is used as a matrix, gamma-Al2O3 is used as a first carrier, Anatase crystalline TiO2 is used as a second carrier, and active components containing V2O5-MoO3 composite oxide are used as the active components, wherein the contents of gamma-Al2O3 and TiO2 are respectively 5-15 wt% and 5-10 wt%, the content of V205-MoO3 is 1-10 wt%, and the mol ratio of V/Mo ranges from 0 to 0.20. The monolithic catalyst provided by the invention has a broad temperature window of 80-450 DEG C; with NH3 as a reducing agent, the transformation rate of NOx is not less than 85%; and the selectivity on 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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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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