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Denitration and demercuration catalyst as well as preparing method and application thereof

A denitrification catalyst and catalyst technology, applied in the field of preparation of denitrification and demercury catalysts, can solve the problems of complex preparation methods, low cost, and single function, and achieve the effects of simplifying the preparation process, improving NOx removal efficiency, and reducing costs

Inactive Publication Date: 2014-01-01
CHINA SHENHUA ENERGY CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to meet the new environmental protection requirements of the country, overcome the single function of the denitrification catalyst in the prior art, and the single function of the mercury removal catalyst, which cannot realize the functions of both denitrification and mercury removal at the same time, and the preparation methods of the two catalysts are complicated. The defect of high cost is to provide a denitrification and demercury catalyst with dual functions of denitrification and demercury, which is low in cost and can be produced in batches, and its preparation method

Method used

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  • Denitration and demercuration catalyst as well as preparing method and application thereof
  • Denitration and demercuration catalyst as well as preparing method and application thereof
  • Denitration and demercuration catalyst as well as preparing method and application thereof

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preparation example Construction

[0011] The invention provides a preparation method of a denitrification and demercuration catalyst, wherein the method comprises: mixing and contacting a ruthenium-containing substance, a titanium-based denitration catalyst and hydrogen peroxide, drying or not drying the contacted mixture, and then roasting.

[0012] According to the preparation method of the present invention, the purpose of the present invention can be well achieved according to the aforementioned technical scheme. For the present invention, in order to further improve the denitrification and demercury activity of the catalyst prepared according to the method of the present invention, preferably the ruthenium-containing substance . The method for mixing and contacting the titanium-based denitration catalyst with hydrogen peroxide comprises: mixing the ruthenium-containing substance with hydrogen peroxide, and mixing and contacting the obtained mixture with the titanium-based denitration catalyst.

[0013] In ...

Embodiment 1

[0035] At room temperature (20°C), the ruthenium oxide RuO 2 Mix with hydrogen peroxide (concentration: 40% by weight), mix the resulting mixture with a titanium-based denitration catalyst (honeycomb type, composition: 92% by weight of titanium dioxide, 8% by weight of vanadium pentoxide), and dry the contacted mixture. Roasting; Wherein, ruthenium oxide is calculated in ruthenium oxide, and hydrogen peroxide is calculated in hydrogen peroxide, and the consumption weight ratio of ruthenium oxide and hydrogen peroxide is 0.1:100, and ruthenium oxide RuO 2 The weight ratio to the titanium-based denitration catalyst was 0.01:1, the drying temperature was 100°C for 3 hours, and the calcination temperature was 400°C for 4 hours to obtain catalyst C1.

Embodiment 2

[0037]At room temperature (20°C), mix ruthenium oxide with hydrogen peroxide (concentration: 30% by weight), and mix and contact the resulting mixture with a titanium-based denitration catalyst (honeycomb type, composition: 92% by weight of titanium dioxide, 8% by weight of manganese oxide), Roasting after drying the contacted mixture; wherein, hydrogen peroxide is calculated as hydrogen peroxide, the weight ratio of ruthenium oxide to hydrogen peroxide is 5:100, and the weight ratio of ruthenium oxide to titanium-based denitration catalyst is 0.03:1, dry The temperature is 300°C, the time is 5h, the temperature of calcination is 1000°C, the time is 2h, and the catalyst C2 is obtained.

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Abstract

The invention provides a denitration and demercuration catalyst as well as a preparing method and application thereof. The method includes the following steps: mixing and contacting a ruthenium-containing substance, a ti-based denitration catalyst with hydrogen peroxide; roasting the contacted mixture dried or undried. According to the invention, as the ruthenium-containing substance, the ti-based denitration catalyst and the hydrogen peroxide are mixed and contacted, and the contacted mixture dried or undried is roasted, the catalyst obtained through adopting the method has the functions of denitration and demercuration, obviously improves the NOx removal efficiency compared with the ti-based denitration catalyst with simple function, and is very high in oxygenation efficiency of Hg<0>(zero valent mercury), namely, the demercuration efficiency is very high.

Description

technical field [0001] The invention relates to a preparation method of a denitrification and mercury removal catalyst, and a denitrification and mercury removal catalyst prepared by the preparation method of the denitration and mercury removal catalyst of the present invention and its application in flue gas treatment. Background technique [0002] The pollutants discharged during the power generation process of thermal power plants cause serious environmental pollution. At this stage, my country's control of SO 2 Pollution problems have achieved certain results, and efforts are being made to control NOx pollution problems. The mercury pollution problem caused by coal burning will soon become a new environmental protection problem in my country. "Notice", "Notice on Promoting Joint Air Pollution Prevention and Control Work to Improve Regional Air Quality Guidance" and other documents all list mercury pollution prevention and control as the focus of work, "Heavy Metal Polluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01D53/90B01D53/86B01D53/56B01D53/64
Inventor 蒋丛进
Owner CHINA SHENHUA ENERGY CO LTD
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