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Activated carbon loaded iron-based low temperature SCR denitration catalyst, preparation method and application method thereof

A denitration catalyst, activated carbon technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. requirements and other issues, to achieve the effect of simple components, good denitration effect, and energy consumption reduction

Inactive Publication Date: 2017-07-04
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the low-temperature denitrification efficiency of the existing SCR denitrification catalyst in my country, which is prone to blockage and poisoning at low temperature, so that it is difficult to meet the use requirements of flue gas denitrification in power plants in my country, and provides an activated carbon-loaded iron-based low-temperature SCR denitrification catalyst and its preparation method and application method

Method used

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  • Activated carbon loaded iron-based low temperature SCR denitration catalyst, preparation method and application method thereof
  • Activated carbon loaded iron-based low temperature SCR denitration catalyst, preparation method and application method thereof
  • Activated carbon loaded iron-based low temperature SCR denitration catalyst, preparation method and application method thereof

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preparation example Construction

[0035] The preparation method of an activated carbon-loaded iron-based low-temperature SCR denitrification catalyst of the present invention uses ground activated carbon particles as a carrier, takes Fe oxides as the main active component, and adds a trace amount of Mn or Co to it as an active auxiliary agent , the active component is loaded on the carrier by impregnation method, and the catalyst is modified by roasting, which specifically includes the following steps:

[0036] (1) Dry the activated carbon carrier at 80-110°C for 3-5 hours, and then grind the dried activated carbon to 40-60 mesh to obtain small carrier particles;

[0037] (2) According to the mass ratio of each component in the catalyst, take ferric nitrate as the precursor of the active component respectively, take manganese nitrate or cobalt nitrate as the precursor of the active auxiliary agent, mix them uniformly and pour them into Add activated carbon carrier particles and deionized water, and stir evenly...

Embodiment 1

[0046] A method for preparing an activated carbon-supported iron-based low-temperature SCR denitration catalyst in this embodiment, the steps are: drying the activated carbon carrier at 80°C for 3 hours, and then grinding the dried activated carbon to 40 mesh (380 microns) to obtain small carrier particles, The activated carbon particles after grinding are used as the carrier, and the active components are loaded on the carrier by the impregnation method. First weigh a certain weight of activated carbon carrier, then calculate the mass of ferric nitrate solution that needs to be weighed according to the Fe load of 5% of the weight of the activated carbon carrier and the law of element conservation, then pour it into the beaker containing the activated carbon carrier, add After deionized water was fully stirred by a magnetic stirrer for 5 hours, it was placed in a blast drying oven at 80°C for 8 hours, and finally it was calcined in a closed air atmosphere at 350°C for 4 hours, ...

Embodiment 2

[0048] A preparation method of an activated carbon-supported iron-based low-temperature SCR denitration catalyst in this embodiment, the steps are: drying the activated carbon carrier at 110° C. for 5 hours, and then grinding the dried activated carbon to 60 mesh (250 microns) to obtain small carrier particles, Using the ground activated carbon particles as the carrier, the active components are loaded on the carrier by the impregnation method, first weigh a certain weight of the activated carbon carrier, and then calculate the Need to weigh the quality of the ferric nitrate solution, then pour it into a beaker loaded with activated carbon carrier, add deionized water, after fully stirring with a magnetic stirrer for 12 hours, place it in a blast drying oven at 90°C for 12 hours, and finally place it in a closed air atmosphere After calcining at 450°C for 6 hours, and then cooling with the furnace, the catalyst was obtained, marked as 10Fe / AC.

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Abstract

Belonging to the technical field of low temperature SCR denitration, the invention discloses an active carbon loaded iron-based low temperature SCR denitration catalyst, a preparation method and application method thereof. The preparation method includes: taking grinded activated carbon as the carrier, using an Fe oxide as the main active component, adding trace Mn or Co as the active assistant respectively, loading the active component on the carrier by impregnation method, then conducting magnetic stirring and drying treatment, and finally performing roasting in air atmosphere, thus obtaining the low temperature SCR denitration catalyst. The low temperature SCR denitration catalyst provided by the invention has the characteristics of convenient production, simple use, and good denitration effect at low temperature, can well solve the problems of low denitration efficiency and slightly high use temperature section in existing denitration catalysts, thus being conducive to prolonging the service life of the catalyst, and saving cost.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and catalysis, and more specifically relates to an activated carbon-supported iron-based low-temperature SCR denitrification catalyst and its preparation method and application method, which are mainly used in low-temperature SCR denitrification in coal-fired power plants or coking plants. Background technique [0002] Nitrogen oxides (NO x ) is one of the harmful substances of air pollution, which can easily cause acid rain and photochemical smog when accumulated in the air to a certain extent, which will have a serious impact on the environment and human health. Therefore, NO x The removal of ions has become one of the important research topics in the field of environmental protection. In the prior art, selective catalytic reduction (Selective Catalytic Reduction, SCR) denitrification technology is mainly used to reduce the NOx emitted by coal combustion. x Control, that is, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/889B01J35/10B01D53/86B01D53/56
CPCB01D53/8628B01J23/002B01J23/75B01J23/8892B01D2258/0283B01J35/633B01J35/647B01J35/615
Inventor 朱宝忠尹寿来王启昌李国波訾朝辉孙华建孙运兰
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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