Medium/low temperature mesoporous nitrogen oxide and dioxin removal catalyst and preparation method thereof

A technology for removing dioxins and catalysts, which is used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. and other problems, to achieve the effect of highly ordered pores, multiple active sites, and uniform pore size

Inactive Publication Date: 2019-10-25
LONGKING COALOGIX ENVIRONMENTAL PROTECTION TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the denitrification activity temperature range of the conventional vanadium-titanium system catalyst is 300-450°C. Below this operating temperature, the denitrification efficiency of the catalyst will be significantly reduced, and the desired effect cannot be achieved; while the activity temperature range of the vanadium-titanium system catalyst for catalytic degradation of dioxins is 200-300°C, which is lower than the optimum denitrification temperature window of the catalyst, it is difficult to achieve synergistic removal of NOx and dioxins in the low temperature region

Method used

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  • Medium/low temperature mesoporous nitrogen oxide and dioxin removal catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Dissolve 6gP123 in 25g ethanol, add dropwise 0.5g dilute hydrochloric acid with a concentration of 0.2 mol / L, and stir in a constant temperature tank at 40ºC for 15-20 minutes to obtain solution A; meanwhile, mix 9.36g ethyl orthosilicate and 1. 49g of octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride was dissolved in ethanol, stirred at 40°C for 30-50 minutes in a constant temperature tank to obtain solution B;

[0019] 2) Mix solution A and solution B obtained in step 1), add 25g of resole phenolic resin ethanol solution, continue to react at 40°C for 2 hours, and evenly coat the obtained reaction solution on the surface of the glass dish. The dish is placed in an oven at 40°C for 6-8 hours to volatilize, then thermally polymerized in an oven at 100°C for 24 hours, and then cool down naturally;

[0020] 3) Take the cooled glass dish out of the oven, scrape off the surface coating, and calcinate the scraped coating at 275°C for 5 hours in a nitrogen atmo...

Embodiment 2

[0023] 1) Dissolve 6gP123 in 25g ethanol, add dropwise 0.5g dilute hydrochloric acid with a concentration of 0.2 mol / L, and stir in a constant temperature tank at 40ºC for 15-20 minutes to obtain solution A; meanwhile, mix 9.36g ethyl orthosilicate and 1. Dissolve 49g of 3-aminopropyltrimethoxysilane in 25g of ethanol, stir in a constant temperature tank at 40ºC for 30-50 minutes to obtain solution B;

[0024] 2) Mix solution A and solution B obtained in step 1), add 25g of resole phenolic resin ethanol solution, continue to react at 40°C for 2 hours, and evenly coat the obtained reaction solution on the surface of the glass dish. The dish is placed in an oven at 40°C for 6-8 hours to volatilize, then thermally polymerized in an oven at 100°C for 24 hours, and then cool down naturally;

[0025] 3) Take the cooled glass dish out of the oven, scrape off the surface coating, and calcinate the scraped coating at 275°C for 5 hours in a nitrogen atmosphere, and then grind it into po...

Embodiment 3

[0028] 1) Dissolve 6gP123 in 25g ethanol, add dropwise 0.5g dilute hydrochloric acid with a concentration of 0.2 mol / L, and stir in a constant temperature tank at 40ºC for 15-20 minutes to obtain solution A; meanwhile, mix 9.36g ethyl orthosilicate and 4. Dissolve 13g of octadecyldimethyl[3-(trimethoxysilyl)propyl]ammonium chloride in 25g of ethanol, stir in a constant temperature bath at 40°C for 30-50 minutes to obtain solution B;

[0029] 2) Mix solution A and solution B obtained in step 1), add 25g of resole phenolic resin ethanol solution, continue to react at 40°C for 2 hours, and evenly coat the obtained reaction solution on the surface of the glass dish. The dish is placed in an oven at 40°C for 6-8 hours to volatilize, then thermally polymerized in an oven at 100°C for 24 hours, and then cool down naturally;

[0030] 3) Take the cooled glass dish out of the oven, scrape off the surface coating, and calcinate the scraped coating at 275°C for 5 hours in a nitrogen atmos...

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Abstract

The invention discloses a medium/low temperature mesoporous nitrogen oxide and dioxin removal catalyst and a preparation method thereof. According to the catalyst, a mesoporous carbon-silicon composite material is adopted as a carrier, and one or more of vanadium pentoxide, tungsten oxide, cerium oxide and manganese oxide are adopted as active components. The catalyst disclosed by the invention iscapable of effectively achieving synergetic removal of NOx and dioxin within a medium/low temperature range of 180-300 DEG C, and in addition, the catalyst disclosed by the invention has the advantages of being large in specific surface area, ordered in pore height, small in active metal particle size and uniform in active metal particle size distribution.

Description

technical field [0001] The invention relates to a medium-low temperature mesoporous denitration and dedioxin catalyst and a preparation method thereof. Background technique [0002] As a typical persistent organic pollutant, dioxin is difficult to degrade and eliminate naturally in the environment, and it is extremely carcinogenic. At present, the main sources of dioxins are chemical metallurgical industry, waste incineration, paper making and production of pesticides and other industries. At present, the activated carbon adsorption method has become the most widely used dioxin terminal control method due to its simple equipment structure and high removal efficiency. However, this method only realizes the transfer of dioxin pollution from the gas phase to the solid phase, but instead increases the burden of fly ash disposal, and even leads to an increase in the total amount of dioxin emissions, without realizing its real degradation. [0003] The selective catalytic reduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J23/34B01J23/22B01J23/30B01J37/08B01J35/10B01D53/86B01D53/56B01D53/72
CPCB01J23/10B01J23/34B01J23/22B01J23/30B01J37/082B01J35/1019B01D53/8628B01D53/8668
Inventor 田超任英杰张晓望封雅芬孙璐璐邓立锋
Owner LONGKING COALOGIX ENVIRONMENTAL PROTECTION TECH SHANGHAI CO LTD
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