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Aging-resistant volatile organic compound purification catalyst and preparation method thereof

A volatile organic compound and catalyst technology, which is applied in the field of volatile organic compound purification catalyst and its preparation, can solve the problems of high cost, growth of precious metal particles, decrease in activity, etc., and achieves the effect of good stability and meeting the requirements of emission regulations.

Active Publication Date: 2021-04-06
WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic oxidation treatment technology also has problems, that is, the catalyst will grow precious metal particles under the condition of 300-500 °C for a long time, and the activity will drop rapidly, resulting in deactivation. Therefore, the catalyst needs to be replaced frequently, resulting in high cost

Method used

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  • Aging-resistant volatile organic compound purification catalyst and preparation method thereof

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Effect test

Embodiment 1

[0029] A preparation method of a catalyst for aging-resistant volatile organic compound purification comprises the following steps:

[0030] a. Prepare Pt(NO 3 ) 2 and Pd(NO 3 ) 2 , Pt(NO 3 ) 2 and Pd(NO 3 ) 2 Precious metal solution mixed, according to Pt(NO 3 ) 2 and Pd(NO 3 ) 2 Add PEG200 solution dropwise to 10 times of the sum of the weights, stir and mix evenly to form a precious metal mixed solution, and prepare 190g of Al 2 o 3powder, using the method of incipient wetness impregnation, the noble metal mixed oxide solution is uniformly impregnated into the Al 2 o 3 On the powder, Al loaded with noble metal oxides is obtained 2 o 3 slurry;

[0031] b. Al loaded with noble metal oxides 2 o 3 The slurry is dried, and the drying temperature is controlled at 100 ° C. After drying, it is roasted in a muffle furnace. The roasting temperature is controlled at 500 ° C, and the roasting time is controlled at 1 hour, and the Al alloy loaded with noble metal Pt an...

Embodiment 2

[0046] A preparation method of a catalyst for aging-resistant volatile organic compound purification comprises the following steps:

[0047] a. Prepare Pt(NO 3 ) 2 and Pd(NO 3 ) 2 , Pt(NO 3 ) 2 and Pd(NO 3 ) 2 Precious metal solution mixed, according to Pt(NO 3 ) 2 and Pd(NO 3 ) 2 Add PEG200 solution dropwise to 10 times of the sum of the weights, stir and mix evenly to form a precious metal mixed solution, and prepare 190g of Al 2 o 3 powder, using the method of incipient wetness impregnation, the noble metal mixed oxide solution is uniformly impregnated into the Al 2 o 3 On the powder, Al loaded with noble metal oxides is obtained 2 o 3 slurry;

[0048] b. Al loaded with noble metal oxides 2 o 3 Dry the slurry to obtain the crude catalyst. The drying temperature is controlled at 100°C. The crude catalyst after drying is roasted in a muffle furnace. The roasting temperature is controlled at 500°C, and the roasting time is controlled at 3 hours. Al of Pd 2 ...

Embodiment 3

[0063] A preparation method of a catalyst for aging-resistant volatile organic compound purification comprises the following steps:

[0064] a. First measure the volume of the cordierite honeycomb ceramic carrier, and prepare Pt(NO 3 ) 2 and Pd(NO 3 ) 2 , Pt(NO 3 ) 2 and Pd(NO 3 ) 2 Mixed to form noble metal mixed oxides, according to Pt(NO 3 ) 2 and Pd(NO 3 ) 2 Add PEG200 solution dropwise to 10 times of the sum of the weights, stir and mix evenly to form a noble metal mixed oxide solution, and prepare 190g of Al 2 o 3 powder, using the method of incipient wetness impregnation, the noble metal mixed oxide solution is uniformly impregnated into the Al 2 o 3 On the powder, Al loaded with noble metal oxides is obtained 2 o 3 slurry;

[0065] b. Al loaded with noble metal oxides 2 o 3 The slurry is dried to obtain the crude catalyst. The drying temperature is controlled at 100°C. The dried catalyst is roasted in a muffle furnace. The roasting temperature is cont...

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Abstract

The invention discloses an anti-aging catalyst for purifying volatile organic compounds. The surface of the carrier is coated with an oxidative catalyst coating; the coating contains Al 2 o 3 , CeO 2 , MnO 2 , noble metal Pt and noble metal Pd; corresponding to each liter of cordierite honeycomb ceramic carrier, Al 2 o 3 , CeO 2 with MnO 2 The usage amounts are 80~200g, 5~30g, and 10~30g respectively; and corresponding to each cubic foot of cordierite honeycomb ceramic carrier, the usage amounts of noble metal Pt and noble metal Pd are 6~50g and 10~20g respectively; its preparation method Includes: Precious metal oxide solution impregnation into Al 2 o 3 Al on powder, loaded with precious metals Pt and Pd 2 o 3 Slurry drying and roasting, crushing and grinding, and preparation of CeO 2 precursors and MnO 2 The precursor solution, the precursor solution is added dropwise to the slurry after grinding, the coating step and the drying and roasting step. The catalyst of the present invention not only has good stability, but also can effectively catalyze and oxidize emission pollutants, and can convert them into pollution-free gas CO 2 and H 2 O, so as to meet the requirements of emission regulations.

Description

technical field [0001] The invention discloses an aging-resistant catalyst for purifying volatile organic compounds. The invention also discloses an aging-resistant catalyst for purifying volatile organic compounds and a preparation method thereof. Background technique [0002] VOCs refer to various volatile organic compounds with a boiling point of 50-260°C under normal pressure, and are usually emitted by coatings, petrochemical, and fine chemical companies. It has caused serious harm to the environment and violated human health, so it has attracted the attention of various countries, and promulgated corresponding laws and regulations to formulate VOCs emission standards. [0003] There are many ways to deal with volatile organic compounds, including direct combustion, catalytic oxidation, adsorption, biological purification, and photocatalytic oxidation. The treatment temperature of the direct combustion method is high, reaching 900°C, which increases the difficulty and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/656B01D53/86B01D53/44
CPCB01D53/8687B01J23/002B01J23/6562B01D2257/708B01J2523/00B01J35/396B01J2523/22B01J2523/31B01J2523/3712B01J2523/41B01J2523/72B01J2523/824B01J2523/828
Inventor 饶超郝士杰张辉吕衍安潘丞业蔡晓江胡怡帆岳军贾莉伟
Owner WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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