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Denitration catalyst as well as preparation method and application thereof

A denitrification catalyst and compound technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., to achieve the effect of non-toxic, harmless, simple operation and low price

Active Publication Date: 2019-10-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is suitable for the catalytic activity of catalytic oxidation of VOCs, not suitable for the removal of chlorine-containing volatile organic compounds

Method used

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  • Denitration catalyst as well as preparation method and application thereof
  • Denitration catalyst as well as preparation method and application thereof
  • Denitration catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

no. 1 approach

[0064] The first embodiment of the present invention provides a denitration catalyst comprising CeO doped with a Mn compound 2 ,in,

[0065] The surface of the denitration catalyst has active ions, and the active ions include inorganic acid ions. Preferably, the electronegativity of all elements of the inorganic acid ions may be greater than 2, for example, above 2.1.

[0066] Further, the electronegativity of all elements except the hydrogen element of the inorganic acid radical ion can preferably be greater than 2.1, more preferably the electronegativity is above 2.2, further preferably the electronegativity is above 2.3, and even more preferably the electronegativity is above 2.3. 2.4 or higher, more preferably an electronegativity of 2.5 or higher, still more preferably an electronegativity of 2.6 or higher. Although the mechanism is not completely clear, when the electronegativity of the inorganic acid radical ion of the present invention is above 2.6 for all elements ex...

no. 2 approach

[0085] In the second embodiment of the present invention, a preparation method of the denitration catalyst of the first embodiment is provided, the preparation method includes the step of modification treatment after preparation by co-precipitation method.

[0086]

[0087] 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.

[0088] 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, mix...

no. 3 approach

[0125] The third embodiment of the present invention provides a denitrification catalyst prepared according to the first embodiment of the present invention or the preparation method of the second embodiment of the present invention to catalytically remove nitrogen oxides and chlorine volatilization in flue gas Uses of sexual organisms.

[0126] 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.

[0127] The denitration catalyst of the present invention can catalyze the removal of nitrogen oxides and chlorine-contai...

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Abstract

The invention provides a denitration catalyst as well as a preparation method and application thereof. The denitration catalyst comprises CeO2 doped with a Mn compound, wherein a molar ratio of Ce atoms to Mn atoms is (0.2-5):1, an average particle diameter of the denitration catalyst is 1 to 100 nm; a surface of the denitration catalyst has active ions, and the active ions include inorganic acidions. The denitration catalyst provided by the invention has excellent denitration efficiency, is inexpensive and environmentally friendly, and has no obvious toxicity; and in addition, the denitration catalyst can remove chlorine-containing volatile organic compounds while removing nitrogen oxides, has excellent chlorine poisoning resistance, and is suitable for synergistic removal of the nitrogen oxides and the chlorine-containing volatile organic compounds in flue gas in industries such as metallurgy, steel sintering and waste incineration.

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] Waste incineration can not only reduce the volume and volume of waste, but also turn waste into resources and energy. However, the pollutants produced by waste incineration seriously threaten the ecological environment and human health. [0003] Chlorine-containing volatile organic compounds (CVOCs) are hotspots and difficulties in the field of environmental catalysis. Among them, chlorinated volatile organic compounds are highly toxic chlorine-containing volatile organic compounds, which seriously pollute the environment and have carcinogenic effects on the human body. Chlorinated volatile organic compounds are a general term for polychlorinated substituted oxygen-containing tricyclic aromatic compounds, including polychlorinated dibenzo-p-dioxins (polychlorinated dibenzo-p-dioxins, PCDDs), p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/187B01J27/24B01J27/25B01J27/06B82Y30/00B82Y40/00B01D53/86B01D53/56B01D53/70
CPCB01D53/8628B01D53/8662B01D2258/0283B01J27/06B01J27/187B01J27/24B01J27/25B82Y30/00B82Y40/00Y02A50/20
Inventor 李俊华甘丽娜彭悦陈建军郭晶晶苏子昂尹荣强
Owner TSINGHUA UNIV
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