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Method for preparing catalyst capable of performing simultaneous desulfurization and denitrification on flue gas

A desulfurization and denitrification, catalyst technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of temperature reduction, catalytic activity reduction, etc., to achieve the effect of enhanced adsorption capacity and lower reaction temperature

Inactive Publication Date: 2016-02-03
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, catalysts for simultaneous desulfurization and denitrification mainly include activated carbon, CuO / Al 2 o 3 , NiO / ZSM-5, spinel-type oxides, etc. These catalysts are medium-temperature or high-temperature catalysts. Generally, the effective catalytic temperature is above 300°C, and the catalytic activity decreases significantly when the temperature decreases.

Method used

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  • Method for preparing catalyst capable of performing simultaneous desulfurization and denitrification on flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、10

[0040] Example 1, 10% Fe 2 o 3 2%Y 2 o 3 / AC

[0041] First, weigh 20-40 mesh AC500g and put it in a glass container, add the prepared 10% HNO 3 , so that AC can be impregnated excessively. After impregnating for 12h, wash with deionized water until neutral, dry in a drying oven at 110°C for 12h, take it out and cool to room temperature, and set aside.

[0042] Then according to the loading capacity of the active component of the catalyst made and cocatalyst, the Fe(NO of 2.5299g 3 ) 3 9H 2 O, 0.3393g of Y (NO 3 ) 3 ·6H 2 0, add 7ml deionized water to be mixed with mixed solution;

[0043] Accurately weigh 5.0000g of pretreated AC, impregnate it into the prepared mixed solution, and impregnate it at room temperature for 12 hours. After obtaining the impregnated activated carbon, place it in a drying oven at 110°C for 12 hours, and then place it in a nitrogen-protected tube. Roasted at 500°C for 4 hours in a type roaster, then took it out and cooled to room temperatu...

Embodiment 2、10

[0045] Example 2, 10% Fe 2 o 3 2%La 2 o 3 / AC

[0046] First, weigh 20-40 mesh AC500g and put it in a glass container, add the prepared 10% HNO 3, so that AC can be impregnated excessively. After impregnating for 12h, wash with deionized water until neutral, dry in a drying oven at 110°C for 12h, take it out and cool to room temperature, and set aside.

[0047] Then according to the loading capacity of the active component of the catalyst made and cocatalyst, the Fe(NO of 2.5299g 3 ) 3 9H 2 O, 0.2658g of La(NO 3 ) 3 ·6H 2 0, add 7ml deionized water to be mixed with mixed solution;

[0048] Accurately weigh 5.0000g of the pretreated AC, impregnate it into the prepared mixed solution, and impregnate it at room temperature for 12 hours to obtain the impregnated activated carbon, then dry it in a drying oven at 110°C for 12 hours, and then place it in a tube type with nitrogen protection. Roasting at 500° C. for 4 hours in a roasting furnace, and then taking it out and ...

Embodiment 3、10

[0050] Example 3, 10% Fe 2 o 3 2%CeO 2 / AC

[0051] First, weigh 20-40 mesh AC500g and put it in a glass container, add the prepared 10% HNO 3 , so that AC can be impregnated excessively. After impregnating for 12h, wash with deionized water until neutral, dry in a drying oven at 110°C for 12h, take it out and cool to room temperature, and set aside.

[0052] Then according to the loading capacity of the active component of the catalyst made and cocatalyst, the Fe(NO of 2.5299g 3 ) 3 9H 2 O, 0.2523g of Ce(NO 3 ) 3 ·6H 2 0, add 7ml deionized water to be mixed with mixed solution;

[0053] Accurately weigh 5.0000g of pretreated AC, impregnate it into the prepared mixed solution, and impregnate it at room temperature for 12 hours. After obtaining the impregnated activated carbon, dry it in a drying oven at 110°C for 12 hours, and then place it in a tube protected by nitrogen. Roasted at 500° C. for 4 hours in a type calciner, and then taken out and cooled to room temper...

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Abstract

The invention discloses a method for preparing a catalyst capable of performing simultaneous desulfurization and denitrification on flue gas. First deionized water is utilized to dissolve a precursor of active component Fe2O3 and a precursor of a promoter, and an active component precursor solution is obtained; a well weighed activated carbon carrier is steeped at room temperature for 10-12 h through the active component precursor solution; the well steeped activated carbon carrier is placed in a drying oven at 110 DEG C to be dried for 12 h and is roasted for 3-5 h at 450-550 DEG C under the nitrogen protection, so that nitrate in the precursors is decomposed into an oxide; the precursors are taken out to be cooled to room temperature, and the catalyst capable of performing simultaneous desulfurization and denitrification on flue gas is obtained. The catalyst prepared through the method is suitable for simultaneous desulfurization and denitrification. Moreover, by pretreatment through nitric acid, the adsorption capacity of the catalyst is enhanced, catalytic activation centers are increased, and the reaction temperature can be reduced by presulfurization.

Description

technical field [0001] The invention relates to the technical field of transition metal oxide catalysts, in particular to a method for preparing a catalyst capable of simultaneous desulfurization and denitrification of flue gas. Background technique [0002] With the development of my country's industry and the consumption of energy, air pollution has become a concern, SO 2 and NO are the most important pollutants, which seriously endanger the ecological environment and human health, reducing SO 2 and NO emissions are imperative. Compared with the combination of traditional SCR denitrification technology and FGD desulfurization technology to achieve the purpose of desulfurization and denitrification, desulfurization and denitrification have the advantages of saving floor space, reducing investment and operating costs, and have attracted a lot of attention. [0003] In the prior art, catalysts for simultaneous desulfurization and denitrification mainly include activated car...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J35/10B01D53/86B01D53/56B01D53/50
Inventor 宋永吉王婷李翠清王虹任晓光
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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