Device for evaluating performance of SCR catalyst for synergistically removing nitric oxide, benzene and methylbenzene

A technology of SCR catalyst and nitric oxide, which is used in measurement devices, chemical analysis using catalysis, material separation, etc., can solve problems such as human health and ecological environment hazards, achieve simple gas distribution, reduce experimental errors, and facilitate operation. Effect

Pending Publication Date: 2020-07-03
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In addition to conventionally controlled inorganic pollutants SO in coal-fired flue gas x , NO, mercury, and dust, there are also a series of volatile organic compounds (among which benzene and toluene account for the majority), SO in flue gas x , NO and volatile organic compounds are highly irritating and toxic, and have brought significant harm to human health and the ecological environment, so they need to be removed in time

Method used

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  • Device for evaluating performance of SCR catalyst for synergistically removing nitric oxide, benzene and methylbenzene
  • Device for evaluating performance of SCR catalyst for synergistically removing nitric oxide, benzene and methylbenzene
  • Device for evaluating performance of SCR catalyst for synergistically removing nitric oxide, benzene and methylbenzene

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Experimental program
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Effect test

Embodiment 1

[0037] This embodiment utilizes Cu-doped V 2 o 5 -WO 3 / TiO 2 Catalyst, to evaluate and test the performance of the catalyst to remove NO, benzene and toluene: the simulated flue gas composition is 500ppm NO, 1000ppm SO 2 , 500ppm NH 3 , 100ppm benzene and toluene, 3.33% O 2 , N 2 It is the carrier gas, the gas flow rate is 750mL / min, and the test temperature is 260-420°C. For the specific test device schematic diagram, see figure 1 .

[0038] Weigh 0.1 g of the catalyst, and fix the catalyst on the constriction of the quartz tube 13 with quartz wool.

[0039] NO, SO 2 , NH 3 , benzene and toluene, O 2 and N 2 The flow rates are all controlled by the gas mass flowmeter 8, except for NH 3 In addition, other simulated mixed gases enter the mixed gas tank 10, NH 3 Directly enter the vertical heating furnace 12, the temperature of the gas mixing tank 10 is controlled at 120°C, and the temperature of the vertical heating furnace 12 is controlled at 260~420°C (±1°C).

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Embodiment 2

[0046] This embodiment utilizes Co-doped V 2 o 5 -WO 3 / TiO 2 Catalyst, to evaluate and test the performance of the catalyst to remove NO, benzene and toluene: the simulated flue gas composition is 500ppm NO, 1000ppm SO 2 , 500ppm NH 3 , 100ppm benzene and toluene, 3.33% O 2 , N 2 It is the carrier gas, the gas flow rate is 750mL / min, and the test temperature is 260-420°C. For the specific test device schematic diagram, see figure 1 .

[0047] Weigh 0.1 g of the catalyst, and fix the catalyst on the constriction of the quartz tube 13 with quartz wool.

[0048] NO, SO 2 , NH 3 , benzene and toluene, O 2 and N 2 The flow rates are all controlled by the gas mass flowmeter 8, except for NH 3 In addition, other simulated mixed gases enter the mixed gas tank 10, NH 3 Directly enter the vertical heating furnace 12, the temperature of the gas mixing tank 10 is controlled at 120°C, and the temperature of the vertical heating furnace 12 is controlled at 260~420°C (±1°C).

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Abstract

The invention discloses a device for evaluating the performance of an SCR catalyst for synergistically removing nitric oxide, benzene and methylbenzene. The device comprises a first gas distribution system, an NH3 gas distribution system, a gas mixing system, a temperature control system, a reaction system and an analysis system which are respectively in electric control connection with an instrument control system, wherein the first gas distribution system, the gas mixing system, the reaction system and the analysis system are sequentially arranged and connected from upstream to downstream along a gas path, the NH3 gas distribution system is connected with the reaction system, and the temperature control system is respectively connected with the gas mixing system and the reaction system.According to the invention, the denitration performance and the volatile organic compound removal performance of the SCR catalyst can be simultaneously detected, the safety is high, the temperature window is wide, the flow rate is adjustable, the proportion selectivity of each pollutant component is high, the application range is wide, the reliability is good, and the performance of the SCR catalyst for synergistically removing nitric oxide, benzene and toluene can be detected on line.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to an SCR catalyst performance evaluation device for synergistically removing nitrogen monoxide, benzene and toluene. Background technique [0002] In addition to conventionally controlled inorganic pollutants SO in coal-fired flue gas x , NO, mercury, and dust, there are also a series of volatile organic compounds (among which benzene and toluene account for the majority), SO in flue gas x , NO and volatile organic compounds are highly irritating and toxic, and have brought significant harm to human health and the ecological environment, so they need to be removed in time. Selective catalytic reduction (SCR) flue gas denitrification technology has high denitrification efficiency and perfect technology. It is the preferred process for further controlling NO emissions after low-nitrogen combustion technology in thermal power plants. The working environment of selective catalytic r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/10G01N33/00G01N30/02G05D23/19
CPCG01N30/02G01N31/10G01N33/0031G01N33/0037G01N33/0047G05D23/1934
Inventor 廖艳芬陈银陈琳陈顺凯马晓茜
Owner SOUTH CHINA UNIV OF TECH
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