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Simultaneous desulfurization and denitration catalyst

A desulfurization, denitrification and catalyst technology, which is applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of easy deactivation of catalysts, complicated processes, secondary pollution by by-products, etc., and achieves wide operating temperature window, source Wide and stable effect

Inactive Publication Date: 2013-03-20
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art such as complex process, secondary pollution by by-products, and easy deactivation of the catalyst, and to provide a simultaneous desulfurization and denitrification catalyst with simple preparation and regeneration methods, high efficiency and stable performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 2.6gPr(NO 3 ) 3 ·6H 2 0 and 4gNi (NO 3 ) 2 ·6H 2 0 was dissolved in 80ml of deionized water, using the equal volume impregnation method, put 50g of activated carbon (AC) particles into the mixed solution of praseodymium nitrate and nickel nitrate, stirred evenly and let it stand for 6h, then dried at 150°C, and finally in nitrogen at 600°C The simultaneous desulfurization and denitrification catalyst 2% Pr 6 o 11 -2%NiO / AC, wherein the mass percentages of carrier activated carbon, active component praseodymium oxide and co-catalyst nickel oxide are 96%, 2% and 2% respectively, the total loading of active component and co-catalyst in the mass of the catalyst The percentage is 4%. The specific surface area of ​​the catalyst is 451.4m 2 g -1 .

[0020] Place an appropriate amount of the catalyst on the bracket in the constant temperature section of the fixed bed, raise the temperature to 350°C and feed simulated flue gas, the composition of the flue gas is...

Embodiment 2

[0022] Weigh 10g.7Pr(CH 3 CO 2 ) 3 ·5H 2 0 and 4.3gCo (NO 3 ) 2 ·6H 2 0 was dissolved in 80ml of deionized water, using the equal volume impregnation method, put 50g of activated carbon particles into the mixed solution of praseodymium acetate and cobalt nitrate, stirred evenly and let it stand for 8 hours, then dried at 150°C, and finally roasted at 800°C in helium for 2 hours 8% Pr 6 o 11 -2% CoO / AC, wherein the mass percentages of carrier activated carbon, active component praseodymium oxide and co-catalyst nickel oxide are 90%, 8% and 2% respectively, the total loading of active component and co-catalyst in the mass of the catalyst The percentage is 10%. The catalyst has a specific surface area of ​​416.5 m 2 g -1 .

[0023] Place an appropriate amount of the catalyst on the bracket in the constant temperature section of the fixed bed, raise the temperature to 450°C, and feed the simulated flue gas. The flue gas composition is: 2500ppmCO, 1000ppmSO 2 , 500ppmN...

Embodiment 3

[0025] Weigh 30gPr(CH 3 CO 2 ) 3 ·5H 2 0 was dissolved in 80ml of deionized water, using the equal volume impregnation method, 50g of activated carbon particles were put into praseodymium acetate solution, stirred evenly and left for 10h, then dried at 200°C, and finally roasted at 700°C in argon for 4 hours to obtain Simultaneous Desulfurization and denitrification catalyst 20% Pr 6 o 11 / AC, wherein the mass percentages of carrier activated carbon and active component praseodymium oxide are 80% and 20% respectively, and the catalyst does not contain any co-catalyst. The specific surface area of ​​the catalyst is 360.2m 2 g -1 .

[0026] Place an appropriate amount of the catalyst on the bracket in the constant temperature section of the fixed bed, raise the temperature to 340°C, and feed simulated flue gas. The flue gas composition is: 2500ppmCO, 1000ppmSO 2 , 500ppmNO, nitrogen is the balance gas, and the space velocity is 1000h -1 . The experimental results are...

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Abstract

The invention relates to a simultaneous desulfurization and denitration catalyst which comprises a carrier with a mass percent of 70-99.9 percent, active ingredient praseodymium oxide with a mass percent of 0.1-3.0 percent and nickel oxide or cobalt oxide prompter with a mass percent of 0-15 percent. The simultaneous desulfurization and denitration catalyst is prepared by an acknowledged isopyknic method and has the advantages of being wide in source, easy to acquire, low in cost, and easy in a preparation and regeneration method as the simultaneous desulfurization and denitration catalyst is manufactured from activated carbon, activated coke or activated carbon fibers, and being large in a catalyst specific surface area, high in activity, good in stability, and wide in operating temperature range from 300 DEG Cto 500 DEG C and capable of acquiring a desulfurization denitration rate over 90 percent, simultaneously eliminating carbon monoxide (CO) in flue gas by using CO as reducing agent, acquiring by-product elemental sulfur, free from secondary pollution, wide in application range and suitable for industry popularization.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, in particular to a simultaneous desulfurization and denitrification catalyst, which is a carbon-supported rare earth metal oxide catalyst. Background technique [0002] Coal and petroleum are the main energy sources in industrial production and daily life, but a large amount of SO is produced during their processing and use. 2 and NO X , causing air pollution such as acid rain, photochemical smog, and ozone depletion, seriously endangering the ecosystem and human health. And with the development of the economy, the emissions of sulfur oxides and nitrogen oxides are on the rise. Therefore, the most important thing to control air pollution is to develop desulfurization and denitrification technologies. [0003] At present, industrial desulfurization and denitrification mainly adopts the technology of combining two independent processes of wet flue gas desulfurization (FGD) and selectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01D53/90B01D53/60
Inventor 史风华宋永吉任晓光
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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