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Catalyst for catalytic combustion of VOCs and preparation method thereof

A catalytic combustion and catalyst technology, which is applied in the direction of combustion methods, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of inconvenient operation for uniform coating of active components, affecting heat transfer effect, and short service life. Achieve the effects of good mass and heat transfer, high processing efficiency and long service life

Pending Publication Date: 2019-12-27
ZHENJIANG EAST CHINA ELECTRIC POWER EQUIP FACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The industrial VOCs catalysts in the prior art usually adopt a monolithic honeycomb structure. Compared with conventional spherical or strip-shaped catalysts, they are large in volume and complex in structure, and it is inconvenient to evenly coat the active components. Traditional methods generally use manual coating. For production and processing, the production efficiency is low, the strength is not high, the heat transfer effect is affected, and the service life is short

Method used

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Examples

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Effect test

preparation example Construction

[0043] 8. A method for preparing a catalytic combustion VOCs catalyst, comprising the following steps:

[0044] (1) Honeycomb carrier pretreatment

[0045] Treat the honeycomb ceramic carrier with 1%-10% dilute nitric acid, immerse it in aluminum sol or silica sol after treatment, take it out after full immersion, dry, and roast; wherein the drying temperature is 80-150°C, and the drying time is 1-5h; roasting The temperature is 400-800°C, and the roasting time is 2-6h.

[0046] (2) Preparation of nano-coating solid solution

[0047] Take Al(NO 3 ) 3 The solution and transition metal nitrate or rare earth metal nitrate are diluted with deionized water, heated and stirred under acidic conditions until a colloid is formed, and a solid solution Al is formed after sintering X m y o 2 composite oxides.

[0048] (3) Preparation and loading of co-catalyst coating slurry

[0049] Take solid solution Al X m y o 2 Mix and grind with rare earth oxides for 2-6 hours, add deio...

Embodiment 1

[0062] The preparation steps of a catalytic combustion VOCs catalyst are as follows:

[0063] (1) Honeycomb carrier pretreatment

[0064] Take a square cordierite honeycomb carrier with a size of 150×150×100 and treat it with 5% dilute nitric acid solution, wash it with deionized water until it is neutral, configure an aluminum sol with a solid content of 20%, and make the treated cordierite honeycomb The carrier is fully impregnated in the silica sol, taken out after saturated impregnation, dried at 80°C for 2 hours, and calcined at 400°C for 4 hours to obtain a processed honeycomb carrier for use.

[0065] (2) Preparation of catalyst coating slurry

[0066] Measure an appropriate amount of Al(NO 3 ) 3 Powder and Ce(NO 3 ) 3 Powder, dilute and mix with deionized water, add acetic acid to adjust to an acidic environment, stir and heat to obtain a colloid, and form a solid solution aluminum-cerium composite oxide AlCeO after drying and sintering 2 ; The aluminum-cerium co...

Embodiment 2

[0072]The preparation steps of a catalytic combustion VOCs catalyst are as follows:

[0073] (1) Honeycomb carrier pretreatment

[0074] Take a square cordierite honeycomb carrier with a size of 150×150×100 and treat it with 5% dilute nitric acid solution, wash it with deionized water until it is neutral, configure an aluminum sol with a solid content of 25%, and make the treated cordierite honeycomb The carrier is fully immersed in the silica sol, taken out after saturated impregnation, dried at 80°C for 2 hours, and calcined at 600°C for 4 hours to obtain a processed honeycomb carrier for use.

[0075] (2) Preparation of catalyst coating slurry

[0076] Measure an appropriate amount of Al(NO 3 ) 3 Powder and Ce(NO 3 ) 3 Powder, dilute and mix with deionized water, add citric acid to adjust to an acidic environment, stir and heat to obtain a colloid, and form a solid solution aluminum-cerium composite oxide AlCeO after drying and sintering 2 ; The aluminum-cerium compos...

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Abstract

The invention discloses a catalyst for catalytic combustion of VOCs and a preparation method of the catalyst. Cordierite honeycomb ceramic or a porous metal material is used as a carrier, the carrieris coated with a nano coating material, precious metal compound transition metal is used as an active component, compound rare earth oxide is used as a catalyst aid, and a solid solution prepared froman alkaline earth metal compound and main group metal oxide is used as a carrier modifier; the carrier and the active component are coated through an automatic production line; the catalyst has advantages of high substrate bonding force, high adhesive force between the active component and the carrier after high-temperature roasting, difficult shedding, high activity, good thermal stability, goodsulfur resistance and long service lifetime, is a broad-spectrum VOC oxidation catalyst, can be used for catalytic combustion treatment of VOCs in the industries of spraying, printing, electronics and the like, and is suitable for CO and RCO catalytic combustion devices.

Description

technical field [0001] The invention relates to a catalyst for catalytic combustion of VOCs in the field of industrial waste gas treatment of atmospheric environmental pollution and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) in industrial waste gas seriously affect the atmospheric environment and human health. Therefore, controlling the pollution caused by VOCs is the main indicator of air pollution prevention and control. The emission standards of VOCs are also getting higher and higher, and recycling and destruction technologies are required Governance; the treatment of VOCs in industrial waste gas is generally fully recovered and destroyed through adsorption concentration-catalytic combustion technology, using adsorbents to adsorb VOCs, and then changing the physical conditions of the environment to enrich and concentrate VOCs to increase the concentration. The characteristics of VOCs are easy to burn, changing certain ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/889B01J23/835F23G7/07B01D53/94
CPCB01J23/894B01J23/8892B01J23/835B01J23/002F23G7/07B01D53/94F23G2209/14B01J2523/00B01J2523/17B01J2523/22B01J2523/25B01J2523/31B01J2523/3712B01J2523/41B01J2523/828B01J2523/824B01J2523/3706B01J2523/72B01J2523/12B01J2523/3718B01J2523/43
Inventor 周婷王海鹏仲纪元
Owner ZHENJIANG EAST CHINA ELECTRIC POWER EQUIP FACTORY CO LTD
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