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Composite metal oxide catalyst for low temperature denitration and preparation method thereof

A low-temperature denitration and composite metal technology, which is applied to denitration catalysts and composite metal oxide low-temperature denitration catalysts. The preparation field of the catalyst can solve the problem that the catalyst is easily affected by dust and sulfur oxides, the catalyst body is easily blocked and poisoned, and the input cost High problems, to reduce the risk of blockage and poisoning, improve low-temperature catalytic activity, and reduce equipment costs

Inactive Publication Date: 2016-04-06
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this setting method has high requirements for reactor equipment and high input costs, and the SCR denitrification catalyst is directly in contact with the untreated flue gas in the boiler. The catalyst itself is easily affected by dust and sulfur oxides, resulting in low catalytic efficiency. Catalyst body is easy to block and poison

Method used

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preparation example Construction

[0039] The present invention also provides a method for preparing the composite metal oxide low-temperature denitration catalyst, comprising the following steps: step 1, preparation of precursor solution; step 2, loading of active components; characterized in that,

[0040] The steps are divided into the following three steps:

[0041] (1) Solution A is prepared, and the soluble salt precursors of Mo, Ce, and V are weighed according to the weight fraction of the active components, wherein the weight parts of Mo, Ce, and V are 3~10 parts, 1~5 parts part, 1 part to 5 parts, it is added to the solvent containing co-solvent, heated in a water bath, and stirred until the solid is completely dissolved to obtain solution A;

[0042] (2) Prepare solution B, weigh 100 parts of anatase TiO 2 The carrier is slowly added to the deionized aqueous solution, stirred to form a uniform emulsion, and solution B is obtained;

[0043] (3) Prepare the mixed solution, mix solution A and solution ...

Embodiment 1

[0052] Follow the steps below for MoO 3 -CeO 2 -V 2 o 5 / TiO 2 Preparation of composite metal oxide low-temperature denitration catalyst, step 1, preparation of precursor solution:

[0053] (1) Prepare solution A, weigh 5 parts of ammonium heptamolybdate, 2 parts of cerium nitrate, and 2 parts of ammonium metavanadate, add them to deionized water containing monoethanolamine, heat in a water bath at 80°C for 2 hours, and stir until the solid is completely Dissolve to obtain solution A;

[0054] (2) Prepare solution B, weigh 100 parts of anatase TiO 2 The carrier is slowly added to the deionized aqueous solution, stirred to form a uniform emulsion, and solution B is obtained;

[0055] (3) Mixed solution preparation, mixed solution A and solution B, 100kHz ultrasonic treatment for 4 hours, and finally obtained a uniform mixed solution;

[0056] Step 2, loading of active components:

[0057] (1) Precipitation of metal salts, slowly add urea to the mixed solution obtained i...

Embodiment 2

[0061] Follow the steps below for MoO 3 -CeO 2 -V 2 o 5 / TiO 2 Preparation of composite metal oxide low-temperature denitration catalyst, step 1, preparation of precursor solution:

[0062] (1) Prepare solution A, weigh 5 parts of ammonium heptamolybdate, 1 part of cerium nitrate, and 2 parts of ammonium metavanadate, add them to deionized water containing monoethanolamine, heat in a water bath at 80°C for 2 hours, and stir until the solid is completely Dissolve to obtain solution A;

[0063] (2) Prepare solution B, weigh 100 parts of anatase TiO 2 The carrier is slowly added to the deionized aqueous solution, stirred to form a uniform emulsion, and solution B is obtained;

[0064] (3) Mixed solution preparation, mixed solution A and solution B, 10KHz ultrasonic treatment for 5 hours, and finally obtained a uniform mixed solution;

[0065] Step 2, loading of active components:

[0066] (1) Precipitation of metal salts, slowly add urea to the mixed solution obtained in ...

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Abstract

The present invention relates to a composite metal oxide catalyst for low temperature denitration, and belongs to the technical field of industrial denitration. The composite metal oxide catalyst for low temperature denitration is characterized by comprising active ingredients containing MoO3, CeO2 and V2O5, and a carrier of TiO2. The active ingredients and the carrier are proportioned according to the following weight ratio: 3-10 parts of MoO3, 1-5 parts of CeO2, 1-5 parts of V2O5, and 100 parts of TiO2. Through the above technical scheme, the active ingredients of MoO3, CeO2 and V2O5 are supported by TiO2 to form a MoO3-CeO2-V2O5 / TiO2 composite metal oxide catalyst for low temperature denitration. The molybdenum-based catalyst has good low-temperature catalytic activity; and CeO2 as an active auxiliary agent not only effectively suppresses SO2 from converting to SO3 to reduce the risk of catalyst clogging and poisoning, but also broadens the active window of the catalyst, so as to reach significant beneficial effects. The invention also relates to a preparation method of the catalyst. The method reaches a stable denitration efficiency of above 90%, and has excellent denitration effect.

Description

technical field [0001] The invention relates to a denitration catalyst, in particular to a composite metal oxide low-temperature denitration catalyst, and also relates to a preparation method of the catalyst, which belongs to the technical field of industrial denitration. Background technique [0002] With the continuous improvement of the degree of industrialization, people's material living conditions have also been greatly improved, but due to people's lack of preparation for the negative impact of industrial development, the environment on which people live is plagued by pollution problems. In recent years, The problem of air pollution is becoming more and more prominent. How to control these pollution phenomena and control them from the source has become an important issue of environmental protection. [0003] Nitrogen oxides (NO x ) is one of the main pollutants in the atmosphere, which mainly comes from exhaust emissions from industrial boilers such as coal-fired pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01D53/90B01D53/56
CPCB01J23/002B01D53/8628B01D53/90B01D2255/2065B01D2255/20707B01D2255/20723B01D2255/20769B01D2257/404B01J23/28B01J2523/00
Inventor 许小兵刘江峰徐辉
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
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