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Composite catalytic filter material for degrading dioxin at low temperature and preparation method thereof

A technology of catalytic filtration and high temperature resistant filter material, applied in catalyst activation/preparation, chemical instruments and methods, separation methods, etc., can solve problems such as easy chlorine poisoning and deactivation, achieve long service life, maintain original performance and stability performance, excellent low temperature activity and selectivity

Active Publication Date: 2020-12-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that the loaded low-temperature Mn-based catalyst is prone to chlorine poisoning and deactivation, and the incineration flue gas contains a certain concentration of HCl acid gas and chlorinated organic pollutants. Therefore, research and development of a catalytic filter with excellent chlorine poisoning resistance material is necessary

Method used

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  • Composite catalytic filter material for degrading dioxin at low temperature and preparation method thereof
  • Composite catalytic filter material for degrading dioxin at low temperature and preparation method thereof
  • Composite catalytic filter material for degrading dioxin at low temperature and preparation method thereof

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Embodiment 1

[0034] Such as figure 1 Shown, preparation method of the present invention is as follows:

[0035] (1) Filter material activation: First cut out a polyphenylene sulfide needle felt filter material disc with a diameter of 20mm, wash it three times with deionized water, dry it in an oven at 105°C for 6 hours, and weigh it; weigh 0.0577g Sodium lauryl sulfate powder was prepared into 200 mL of 0.001 mol / L sodium lauryl sulfate solution with deionized water as a solvent, and the dried polyphenylene sulfide disc was immersed in the solution, and ultrasonically activated for 1 h.

[0036] (2) Precipitation in situ: a). Impregnating Ce active components: Weigh 0.3251 g of cerium chloride heptahydrate and add it to the solution obtained in step (1), and stir at room temperature for 12 hours.

[0037] b).KMnO 4 Oxidation: Weigh 1.3790g of potassium permanganate powder, dissolve it in 100mL of deionized water, and prepare a 0.08mol / L potassium permanganate solution, and add 100mL of 0...

Embodiment 2

[0041] (1) Filter material activation: first cut out a polyphenylene sulfide needle felt filter material disc with a diameter of 20mm, wash it three times with deionized water, dry it in an oven at 105°C for 6 hours, and weigh it; weigh 0.2307g Sodium lauryl sulfate powder was prepared into 200 mL of 0.004 mol / L sodium lauryl sulfate solution with deionized water as a solvent, and the dried polyphenylene sulfide disc was immersed in the solution, and ultrasonically activated for 2 hours.

[0042] (2) Precipitation in situ: a): impregnation of Ce active components: Weigh 0.6502 g of cerium chloride heptahydrate and add it to the solution obtained in step (1), and stir at room temperature for 16 hours.

[0043] b): KMnO 4 Oxidation: Weigh 2.7580g of potassium permanganate powder, dissolve it in 100mL of deionized water, and prepare a 0.17mol / L potassium permanganate solution, and add 100mL of 0.17mol / L potassium permanganate solution to step a ) in the resulting solution, stirr...

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Abstract

The invention discloses a composite catalytic filter material for degrading dioxin at low temperature and a preparation method thereof, and belongs to the technical field of waste incineration tail gas treatment. The composite catalytic filter material loaded with a VOx-MnCeOx three-way catalyst is prepared by taking a high-temperature-resistant filter material as a catalyst carrier and the stepsof filter material activation, in-situ precipitation, V active component impregnation and low-temperature plasma oxidation. The catalyst has the advantages that (1) the catalyst has excellent low-temperature activity and selectivity on catalytic degradation of dioxin; (2) the active component V with high activity and excellent chlorine poisoning resistance is added into the filter material, and the V active component is effectively oxidized through low-temperature plasma, so that the catalytic activity and the chlorine poisoning resistance are improved; and (3) the catalyst is uniformly and firmly loaded on the surface of the filter material through an in-situ precipitation method, the preparation conditions are mild, the original performance and stability of the filter material are maintained, and the service life is long.

Description

technical field [0001] The invention belongs to the technical field of waste incineration tail gas treatment, and in particular relates to a composite catalytic filter material for low-temperature degradation of dioxins and a preparation method thereof. Background technique [0002] In recent years, my country's domestic waste incineration industry has been greatly developed, the rate of waste incineration and disposal will continue to rise, and the scale of waste incineration power plants under construction and proposed to be built continues to expand. The "avoidance effect" cannot be ignored, especially the trace amount of dioxin pollutants emitted in the incineration flue gas poses a serious threat to the environment and human health, which has attracted great attention from the state. In 2014, my country's dioxin emission standard was lowered to 0.1ngTEQ / Nm 3 (GB18485-2014). [0003] At present, waste incineration plants mainly use the combination of activated carbon in...

Claims

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Application Information

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IPC IPC(8): B01D39/08B01J23/34B01J37/34B01D46/02B01D53/86B01D53/70
CPCB01D39/08B01D46/02B01D53/8662B01D2239/0618B01D2239/10B01J23/34B01J37/349
Inventor 陆胜勇彭亚旗刘红蕾汤明慧李晓东严建华
Owner ZHEJIANG UNIV
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