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Low-temperature denitration MnOx-CuO-TiO2 catalyst as well as preparation method and application thereof

A mnox-cuo-tio2, low-temperature denitrification technology, applied in the field of low-temperature flue gas denitrification, can solve the problems of short service life of catalyst, catalyst poisoning, etc., and achieve the effects of easy operation, improved water resistance, and low preparation cost

Inactive Publication Date: 2013-04-24
上海电气电站环保工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to provide a low-temperature denitrification MnOx-CuO-TiO 2 catalyst

Method used

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  • Low-temperature denitration MnOx-CuO-TiO2 catalyst as well as preparation method and application thereof
  • Low-temperature denitration MnOx-CuO-TiO2 catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A low-temperature denitrification MnOx-CuO-TiO 2 Catalyst A is calculated based on the molar ratio of the metal elements Mn, Ti, and Cu contained, wherein Mn:Ti:Cu is 0.2:1:0.1.

[0051] The above-mentioned low-temperature denitrification MnOx-CuO-TiO 2 The preparation method of catalyst A specifically comprises the steps:

[0052] (1) Prepare A and B solutions

[0053] ①, the preparation of A solution:

[0054] 2.416g Cu (NO 3 ) 2 ·3H 2 O was dissolved in 40ml of absolute ethanol, and 34.2ml of butyl titanate was slowly added at room temperature using a polytetrafluoroethylene stirring paddle at a controlled stirring rate of 200rpm to obtain A solution;

[0055] The amount of soluble copper salt, butyl titanate and absolute ethanol used in the above solution A is calculated by molar ratio, that is, copper in soluble copper salt: titanium in butyl titanate: absolute ethanol is 1:10 : 68.6;

[0056] ②, the preparation of B solution:

[0057] 8ml 50%Mn (NO 3 ) ...

Embodiment 2

[0064] A low-temperature denitrification MnOx-CuO-TiO 2 Catalyst B is calculated based on the molar ratio of the metal elements Mn, Ti, and Cu contained, wherein Mn:Ti:Cu is 0.4:1:0.2.

[0065] The above-mentioned low-temperature denitrification MnOx-CuO-TiO 2 The preparation method of catalyst B, the steps are as follows:

[0066] (1) Prepare A and B solutions

[0067] ①, the preparation of A solution:

[0068] 4.832g Cu (NO 3 ) 2 ·3H 2 O was dissolved in 40ml of absolute ethanol, and 34.2ml of butyl titanate was slowly added at room temperature using a polytetrafluoroethylene stirring paddle at a controlled stirring rate of 200rpm to obtain A solution;

[0069] The amount of soluble copper salt, butyl titanate and absolute ethanol used in the above solution A is calculated by molar ratio, that is, copper in soluble copper salt: titanium in butyl titanate: absolute ethanol is 1:5 : 34.3;

[0070] ②, the preparation of B solution:

[0071] 16ml 50%Mn (NO 3 ) 2 ·6H ...

Embodiment 3

[0078] A low-temperature denitrification MnOx-CuO-TiO 2 Catalyst C, the catalyst is calculated according to the molar ratio of the metal elements Mn, Ti and Cu contained, wherein Mn:Ti:Cu is 0.6:1:0.2.

[0079] The above-mentioned low-temperature denitrification MnOx-CuO-TiO 2 The preparation method of catalyst C, the steps are as follows:

[0080] (1) Prepare A and B solutions

[0081] ①, the preparation of A solution:

[0082] 4.832gCu (NO 3 ) 2 ·3H 2 O was dissolved in 40ml of absolute ethanol, and 34.2ml of butyl titanate was slowly added at room temperature using a polytetrafluoroethylene stirring paddle at a controlled stirring rate of 200rpm to obtain A solution;

[0083] The amount of soluble copper salt, butyl titanate and absolute ethanol used in the above solution A is calculated by molar ratio, that is, copper in soluble copper salt: titanium in butyl titanate: absolute ethanol is 1:5 : 34.3;

[0084] ②, the preparation of B solution:

[0085] 24ml 50%Mn (NO...

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Abstract

The invention discloses low-temperature denitration MnOx-CuO-TiO2 catalyst as well as a preparation method and application thereof. The low-temperature denitration MnOx-CuO-TiO2 catalyst comprises two parts of a carrier and active components, wherein the carrier is TiO2; the active components consist of MnOx and CuO; MnOx is one of MnO2, Mn3O4 and Mn2O3 or a mixture consisting of more than two thereof; and the mol ratio of metal elements Mn, Ti and Cu in the low-temperature denitration MnOx-CuO-TiO2 catalyst is (0.2-0.6): 1: (0.1-0.2). The preparation method adopts butyl titanate, manganous nitrate and copper nitrate as precursors, and uses the sol-gel method to prepare the MnOx-CuO-TiO2 catalyst, so that the preparation cost is low, the industrial promotion is convenient, and better denitration effect is provided in smoke with the temperature of 150-250 DEG C.

Description

technical field [0001] The invention relates to the field of low-temperature flue gas denitrification, in particular to a low-temperature denitrification MnOx-CuO-TiO 2 Catalyst and its preparation method and application. Background technique [0002] NOx is one of the important air pollutants emitted by coal-fired power plants, and is an important cause of acid rain and photochemical smog. Preliminary estimates show that during the "12th Five-Year Plan" period, the NO X Emissions will reach around 12 million tons. Since the type of acid rain in my country has changed from sulfuric acid acid rain to nitric acid and sulfuric acid mixed acid rain, it has caused great harm to the environment and human health. Therefore, NO X The control of air pollutants has become the focus of the work of air pollutant control in the national "Twelfth Five-Year Plan". [0003] Take NH 3 Selective catalytic reduction denitration technology (SCR technology) as a reducing agent is an effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/56
Inventor 郭瑞堂金强潘卫国丁承刚洪杰南郭士义于月良周曰甄文龙
Owner 上海电气电站环保工程有限公司
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