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Integral reactor of dielectric barrier discharge coupling catalyst for removing NOx in diesel engine

A dielectric barrier discharge and catalyst technology, which is applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve the problems of catalyst sulfur poisoning, achieve the effects of solving sulfur poisoning, long residence time, and improving selectivity

Inactive Publication Date: 2010-09-15
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The dielectric barrier discharge coupled catalyst integral reactor can avoid the use of noble metal catalysts, and also solves the problem of catalyst sulfur poisoning

Method used

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  • Integral reactor of dielectric barrier discharge coupling catalyst for removing NOx in diesel engine
  • Integral reactor of dielectric barrier discharge coupling catalyst for removing NOx in diesel engine
  • Integral reactor of dielectric barrier discharge coupling catalyst for removing NOx in diesel engine

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Embodiment Construction

[0029] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] Such as figure 1 , figure 2 As shown, the present invention includes: a high-voltage high-frequency pulse power supply 1, a power control switch 2, an air intake pipe 3, an air intake air guide cover 4, an insulating jacket layer 5, a corundum tube 6, a stainless steel mesh low-voltage electrode 7, and a stainless steel mandrel high-voltage electrode 8. SCR catalyst 9, two floating centering porous plates 10, air outlet air guide cover 11, air outlet pipe 12, high voltage discharge positive rod 13, polytetrafluoroethylene insulating column 14, temperature sensor 15; using Al 2 o 3 Corundum tube 6 is used as a dielectric material, its inner diameter is 20mm, outer diameter is 25mm, and length is 276mm; the middle section is processed into a spiral stainless steel mandrel high-voltage electrode 8 placed at the axis of corundum tub...

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Abstract

The invention discloses an integral reactor of a dielectric barrier discharge coupling catalyst for removing NOx in a diesel engine, belonging to the technical field of the control of gaseous pollutants of tail gas from a diesel engine. In the invention, the integral reactor filled with an SCR (Selective Catalyst Reduction) catalyst is adopted, i.e. the integral reactor is subjected to dielectric barrier discharge in the presence of the SCR catalyst. By utilizing a synergism purification effect of low-temperature plasma purification generated by the dielectric barrier discharge and the purification of the SCR catalyst, the integral reactor modifies the tail gas of the diesel engine, which contains NO, O2, H2O, SO2 and hydrocarbon (HCs), and modifies the SCR catalyst placed in a discharging area, thereby greatly improving the low-temperature reactivity of the SCR catalyst, broadening the temperature window of the SCR catalyst and reducing the NOx effectively within the wide temperature reaction window at 100-550 DEG C; and meanwhile, the integral reactor also effectively solves the problem of sulfur poisoning of the catalyst, is suitable for the high-sulfur containing diesel in China and can greatly improve the NOx conversion efficiency of NH3-SCR when the diesel engine is in cold start at low temperature or is idling.

Description

Technical field: [0001] The invention relates to a method for removing diesel engine NO x A dielectric barrier discharge coupled catalyst monolithic reactor, especially one for wide reaction temperature window NH 3 -SCR (Ammonia-Selective Catalytic Reduction) to remove diesel engine NO x A dielectric barrier discharge coupled SCR catalyst integrated reactor belongs to the technical field of diesel engine exhaust emission pollutant control. Background technique: [0002] Nitrogen oxides (NO x ) and particulate matter (PM) have an inherent "trade-off" effect, and it is difficult to make diesel engine emissions meet the increasingly stringent emission regulations by simply using pre-machine and in-machine measures. x To meet the emission standards of Euro IV and above at the same time as PM emissions, a method of combining internal and external control must be adopted. while NH 3 -SCR technology due to its NO x The advantages of high conversion efficiency, strong anti-sul...

Claims

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Application Information

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IPC IPC(8): F01N3/28F01N3/20
CPCY02T10/24Y02T10/12
Inventor 管斌林赫黄震
Owner SHANGHAI JIAO TONG UNIV
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