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Catalyst based on volatile organic pollutant purification and preparation method thereof

A technology for volatile organic pollutants, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of removal of unfavorable organic pollutant species, high catalyst production cost, high light-off temperature, etc., to achieve preparation The method is simple, the steps are easy to operate, and the effect of improving hydrophobicity

Inactive Publication Date: 2019-07-09
WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, the VOC catalyst coating has a high ignition temperature of organic pollutants, which is not conducive to the removal of organic pollutants in the field of industrial catalysis, because at low temperatures, the adsorption capacity of CO and noble metals is strong, and the active sites are occupied by CO. Only when CO After the desorption reaction is completed, the reaction of organic species begins, and the higher COT 50 It will inhibit the reaction of organic pollutant species. In addition, the amount of noble metal used in the noble metal-supported catalyst is too large, and the production cost of the catalyst is too high

Method used

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  • Catalyst based on volatile organic pollutant purification and preparation method thereof
  • Catalyst based on volatile organic pollutant purification and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of preparation method based on the catalyst of volatile organic pollutant purification comprises the following steps:

[0030] a, take 25 mole parts of C 4 h 6 MnO 4 4H 2 O, 20 molar parts of Co(NO 3 ) 2 ·6H 2 O and 15 mole parts of Zr(NO 3 ) 4 ·5H 2 O mix and stir evenly;

[0031] b. Add 150-180 mole parts of citric acid dropwise to the mixture in step a, and stir for 2 hours;

[0032] c. Add 15-20 mole parts of polyethylene glycol dropwise to the mixture in step b, stir and react for 6 hours to obtain a solid-liquid mixture, and let the solid-liquid mixture stand for 6 hours;

[0033] d. After standing still, perform suction filtration, take the powder part and dry it at 90°C for 10 hours, then decompose it at 250°C for 1 hour, and finally roast it at 500°C for 3 hours to obtain Mn-Co-Zr composite oxide;

[0034] e, get the ZSM-5 molecular sieve of 30 weight parts, the Mn-Co-Zr composite oxide of 68 weight parts and the ZrO of 2 weight parts 2 The s...

Embodiment 2

[0042] A kind of preparation method based on the catalyst of volatile organic pollutant purification comprises the following steps:

[0043] a, take 65 mole parts of C 4 h 6 MnO 4 4H 2 O, 60 molar parts of Co(NO 3 ) 2 ·6H 2 O and 45 molar parts of Zr(NO 3 ) 4 ·5H 2 O mix and stir evenly;

[0044] b. Add 180 molar parts of citric acid dropwise to the mixture in step a, and stir for 5 hours;

[0045] c. Add 20 molar parts of polyethylene glycol dropwise to the mixture in step b, stir and react for 12 hours to obtain a solid-liquid mixture, and leave the solid-liquid mixture for 12 hours;

[0046] d. After standing still, perform suction filtration, take the powder part and dry it at 150°C for 5 hours, then decompose it at 350°C for 1 hour, and finally roast it at 600°C for 3 hours to obtain Mn-Co-Zr composite oxide;

[0047] e, get the ZSM-5 molecular sieve of 37.5 parts by weight, the Mn-Co-Zr composite oxide of 109.5 parts by weight and the ZrO of 7.5 parts by weigh...

Embodiment 3

[0055] A kind of preparation method based on the catalyst of volatile organic pollutant purification comprises the following steps:

[0056] a, take 45 mole parts of C 4 h 6 MnO 4 4H 2 O, 40 molar parts of Co(NO 3 ) 2 ·6H 2 O and 30 mole parts of Zr(NO 3 ) 4 ·5H 2 O mix and stir evenly;

[0057] b. Add 165 molar parts of citric acid dropwise to the mixture in step a, and stir for 4 hours;

[0058] c. Add 18 molar parts of polyethylene glycol dropwise to the mixture in step b, stir and react for 8 hours to obtain a solid-liquid mixture, and leave the solid-liquid mixture for 10 hours;

[0059] d. After standing still, perform suction filtration, take the powder part and dry it at 120°C for 7h, then decompose it at 300°C for 1.5h, and finally roast it at 550°C for 4h to obtain Mn-Co-Zr composite oxide;

[0060] e, get the ZSM-5 molecular sieve of 33 parts by weight, the Mn-Co-Zr composite oxide of 85 parts by weight and the ZrO of 4.5 parts by weight 2 The sol was ad...

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Abstract

The invention relates to a catalyst based on volatile organic pollutant purification and a preparation method thereof. A catalyst carrier is coated with an oxidizing catalyst coating, and the oxidizing catalyst coating contains a ZSM-5 molecular sieve, an Mn-Co-Zr composite oxide, ZrO2 sol and noble metal Au. The preparation method comprises an Mn-Co-Zr composite oxide synthesis step, a catalyst slurry preparation step and a catalyst slurry coating step. The catalyst can effectively catalyze oxidation of discharged pollutants, and can oxidize gas-phase pollutants, organic pollutants, CO and the like into harmless gas CO2 and H2O, so that requirements of emission regulations are met. The preparation method disclosed by the invention is simple, and the steps are easy to operate. The catalystprepared by the preparation method disclosed by the invention has good low-temperature ignition activity on organic pollutants and has a low CO ignition temperature, so that the reaction of the organic pollutants is promoted, and good durability is achieved.

Description

technical field [0001] The invention relates to a catalyst and a preparation method based on the purification of volatile organic pollutants, belonging to the technical field of catalyst preparation. Background technique [0002] Volatile organic compounds are a general term for a class of organic compounds. Like particulate matter, they are a large class of air pollutants. They mainly come from industrial exhaust gases, such as papermaking, paint coatings, mining, etc., and exhaust gases emitted by vehicles. Exhaust gas emitted by energy vehicles such as diesel vehicles and natural gas. [0003] Volatile organic pollutants have caused great harm to the environment, the growth of animals and plants, and human health, thereby increasing the deterioration of the atmospheric environment, so they have been valued by countries all over the world. Many developed countries have promulgated corresponding regulations to limit the discharge of organic pollutants. [0004] The reduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48B01D53/86B01D53/44B01D53/62
CPCB01D53/864B01D53/8687B01D2255/106B01D2255/20715B01D2255/2073B01D2255/20746B01D2255/504B01D2257/502B01D2257/708B01J29/48Y02A50/20
Inventor 杨金岳军蒋颉郝士杰沈逸飞贾莉伟
Owner WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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