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Denitrification catalyst and its preparation method and application

A technology of denitrification catalyst and diffraction method, which is applied in the field of catalysts to achieve the effects of easy acquisition, excellent denitrification efficiency, and simple process operation

Active Publication Date: 2020-12-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the denitrification catalyst of the present invention has solved sulfur (SO 2 ) poisoning without causing irreversible deactivation of the catalyst

Method used

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  • Denitrification catalyst and its preparation method and application
  • Denitrification catalyst and its preparation method and application
  • Denitrification catalyst and its preparation method and application

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Experimental program
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Effect test

no. 1 approach

[0062] The first embodiment of the present invention provides a denitration catalyst comprising Mn doped with a Cu compound 3 o 4 .

[0063] like Figure 5 Shown, in the present invention, when using powder X-ray diffraction method to adopt CuK α When analyzing the radiation experiment conditions, the X-ray diffraction pattern of the denitrification catalyst has a characteristic peak at the position where 2θ (°) is 36.1±0.2, or

[0064] When the powder X-ray diffraction method is used to analyze the experimental conditions of CuKα radiation, the X-ray diffraction pattern of the denitration catalyst has a characteristic peak at the position where 2θ (°) is 35.3±0.2.

[0065] It can be determined that Mn can be contained in the denitration catalyst of the present invention by using powder X-ray diffraction method 3 o 4 , and for different catalysts, the Mn 3 o 4 The crystal form may be different.

[0066] The inventors of the present invention unexpectedly found that the...

no. 2 approach

[0084] In the second embodiment of the present invention, a method for preparing the denitration catalyst according to the first embodiment is provided, that is, the denitration catalyst is prepared by a co-precipitation method.

[0085]

[0086] The co-precipitation method refers to the solution containing two or more cations, which exist in the solution in a homogeneous phase, adding a precipitating agent, and after precipitation reaction, a uniform precipitation of various components can be obtained. An important method for the composite oxide ultrafine powder of two or more metal elements.

[0087] The present invention uses the co-precipitation method, and the powder material can be directly obtained through chemical reaction in the solution. Specifically, in the process of co-precipitation, the process conditions that can be controlled include: chemical ratio, solution concentration, solution temperature, type and quantity of dispersant, mixing method, stirring speed, ...

no. 3 approach

[0115] The third embodiment of the present invention provides a use of a denitration catalyst to catalytically remove nitrogen oxides in flue gas, and the denitration catalyst includes the denitration catalyst prepared according to the first embodiment or the preparation method of the second embodiment denitrification catalyst.

[0116] When used for removing nitrogen oxides, it may be a denitration catalyst composition. The denitration catalyst composition may include other various denitration catalysts known in the art. In a preferred embodiment of the present invention, the denitration catalyst composition includes at least 60% by mass of the denitration catalyst described in the present invention, preferably 80% by mass or more, more preferably 90% by mass or more, based on the weight of the denitration catalyst composition Total Mass Meter.

[0117] The denitrification catalyst of the present invention can catalyze the removal of nitrogen oxides in all flue gases. Speci...

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Abstract

The invention provides a denitration catalyst and a preparation method and application thereof. The denitration catalyst comprises Mn3O4 doped with a Cu compound, wherein a molar ratio of Cu atoms to Mn atoms is 1:(1 to 50); the average particle diameter of the denitration catalyst is 75 nm or below. When analysis is carried out by adopting CuK alpha radiation experimental conditions through a powder X-ray diffraction method, the X-ray diffraction pattern of the denitration catalyst has a characteristic peak at a position where 2 pentaquarks (degree) is 36.1+ / -0.2; or when analysis is carried out by adopting the CuK alpha radiation experimental conditions through the powder X-ray diffraction method, the X-ray diffraction pattern of the denitration catalyst has a characteristic peak at a position where 2 pentaquarks (degree) is 35.3+ / -0.2. The denitration catalyst provided by the invention has excellent denitration efficiency at low temperature, is low in price, is environmentally friendly, and has no obvious toxicity. The denitration catalyst provided by the invention has relatively strong sulfur resistance, and reduces irreversible inactivation of the denitration catalyst during use.

Description

technical field [0001] The invention provides a denitrification catalyst and its preparation method and application, belonging to the field of catalysts. Background technique [0002] With the rapid reduction of emissions from coal-fired power plants, the building materials industry has become the main source of air pollutants. The emission control and system solutions of smoke pollutants in the building materials industry have become the key to improving the current air quality. However, there are still great difficulties in efficiently controlling the emission of smoke pollutants in the building materials industry. [0003] Nitrogen oxides (NO x ) is one of the main by-products of fossil fuel combustion, which can lead to serious environmental problems such as smog, photochemical smog, and acid rain. Foreign cement industry for NO x The main denitrification technologies include low-nitrogen combustion, staged combustion, selective non-catalytic reduction (SNCR) denitrif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J37/03B01D53/86B01D53/56B82Y30/00B82Y40/00
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/8892B01J37/031B82Y30/00B82Y40/00
Inventor 李俊华熊尚超王栋彭悦陈建军
Owner TSINGHUA UNIV
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