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A kind of flue gas denitrification catalyst and its preparation method and application

A denitration catalyst and flue gas technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., to achieve the effect of widening the denitration temperature window, improving the resistance to SO2 poisoning, and improving the catalytic efficiency of denitration

Active Publication Date: 2016-09-28
北京黄埔智造科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the specific surface area, thermal stability, denitrification efficiency and active temperature window of the catalyst have all been improved, there are still deficiencies that need to be further improved.

Method used

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  • A kind of flue gas denitrification catalyst and its preparation method and application
  • A kind of flue gas denitrification catalyst and its preparation method and application
  • A kind of flue gas denitrification catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of titanium crosslinking agent:

[0030] Under stirring conditions, tetrabutyl titanate was added dropwise into 6mol / L HCl aqueous solution, after stirring, 500 mL of deionized water was added, and stirring was continued to obtain a transparent crosslinking agent solution, which was aged at room temperature overnight. where Ti 4+ / H + 1 / 2, that is, every liter of HCl aqueous solution corresponds to 3 mol of tetrabutyl titanate.

[0031] Preparation of titanium layer pillar clay:

[0032] Add rectorite to deionized water to prepare a rectorite suspension with a mass fraction of 1%. Under stirring conditions, the prepared cross-linking agent solution was added dropwise to the rectorite suspension, stirred at room temperature for 3 hours, left standing overnight, washed and filtered until no Cl - (with AgNO 3 solution test), after pre-drying the obtained solid at room temperature, in a muffle furnace, the temperature was raised to 400°C at a rate of 3°C / mi...

Embodiment 2

[0039]The preparation method of Example 1 was used to prepare titanium-layered columnar rectorite, the difference being that the amount of crosslinking agent and the amount of CuO precursor and CaO precursor were changed to achieve a loading of CuO of 4wt%, CaTiO 3 The loading amount is 12wt%.

[0040] Catalytic Activity Detection

[0041] The catalytic material obtained in Example 2 is installed in a fixed-bed quartz reactor, and simulated flue gas is introduced, and its specific components are NO, NH 3 , O 2 , the activity of the catalyst was investigated under the condition of gas space velocity, and the electron micrograph of its microstructure is as follows figure 1 , 2 Shown; denitrification data results are shown in image 3 shown.

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Abstract

The invention discloses a flue gas denitration catalyst as well as a preparing method and an application thereof. The flue gas denitration catalyst takes pillared interlayered clay as a carrier, CuO loaded on the carrier as an active ingredient, and CaTiO3 loaded on the carrier as a cocatalyst; the loading amount of CuO is 4-8wt% of the carrier, and the loading amount of CaTiO3 is 10-15wt% of the carrier. According to the invention, the catalyst which is prepared by taking the pillared interlayered clay as the carrier, CuO loaded on the carrier as the active ingredient and CaTiO3 loaded on the carrier as the cocatalyst can obviously improve the denitration catalytic efficiency and resistance to SO2 toxicity, thus obtaining a wide denitration temperature window; the problem that a traditional V-W-TiO2 denitration catalyst is low in activity and low in resistance to sulfur dioxide toxicity at high temperature is solved.

Description

technical field [0001] The invention relates to the technical field of nitrogen oxide reduction, in particular to a flue gas denitrification catalyst and its preparation method and application. Background technique [0002] The massive emissions of sulfur and nitrogen oxides have aggravated urban air pollution, and the environmental problems caused by emissions have posed a huge threat to human health, the ecological environment, and society. Sulfur and nitrogen oxides will be converted into PM2.5 particles in the atmosphere, endangering human health; sulfur and nitrogen oxides will also cause severe acid rain, which in turn will cause plant death and land desertification. [0003] According to the 13-year monitoring data analysis of 2177 environmental monitoring stations nationwide by the State Environmental Protection Administration, the acid rain area in my country is about 4 million square kilometers, accounting for about 40% of the country's area. Acid rain and sulfur ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01D53/86B01D53/56
Inventor 隋成华徐丹阳卢忠
Owner 北京黄埔智造科技发展有限公司
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