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Macroporous spherical composite catalyst for removing benzene series in air and preparation method thereof

A technology of composite materials and catalysts, applied in the direction of organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve secondary pollution and other problems, achieve good activity, reduce secondary pollution Secondary pollution, good low-temperature catalytic activity effect

Inactive Publication Date: 2017-06-23
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When in use, some are easily blown by the airflow through the filter (cloth) and enter the purified environment, causing secondary pollution. In addition, the powder agglomerates so that the contact with the gas to be purified is not as good as a spherical one, and there is still a distance from the real practicality.

Method used

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  • Macroporous spherical composite catalyst for removing benzene series in air and preparation method thereof
  • Macroporous spherical composite catalyst for removing benzene series in air and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 2 grams of chloropalladium acid and dissolve it in 100mL of water. While stirring, add 100g of D301 macroporous weakly basic styrene-based anion exchange resin and stir evenly. Rinse until no chloride ions in the filtrate can be detected with silver nitrate solution, then put the resin in a drying oven at 60°C to dry.

[0033] Al with an average particle size of 5 microns 2 o 3 12g of the powder is slurried with a 3% aqueous solution of methyl cellulose, ground into a uniform slurry with an agglomerated particle size of less than 30 microns with a three-roller mill, and the above-mentioned macroporous resin that has adsorbed precious metals is used for slurry roll coating and dried 30 minutes.

[0034] Use nano palladium black 0.8g to carry out rolling on Al 2 o 3 The surface layer of the film was dried at 180°C for 12 hours. Put the above resin into a muffle furnace heated to 700°C to burn and volatilize for 1-8 hours, and then reduce it in a hydrogen atmosph...

Embodiment 2

[0036]Take 2.2 grams of chloroplatinic acid and dissolve it in 100 mL of water. Under stirring, add 100 g of D301 macroporous weakly basic styrene-based anion exchange resin and stir evenly. The solution changes from orange to colorless and transparent. Separate the solid and liquid, and use Rinse with a small amount of water until no chloride ions are detected in the filtrate with silver nitrate solution, then put the resin into a drying oven at 60°C to dry.

[0037] CeO with an average particle size of 1 μm 2 -Al 2 o 3 12g of the powder is slurried with a 3% aqueous solution of methyl cellulose, ground into a uniform slurry with an agglomerated particle size of less than 30 microns with a three-roller mill, and the above-mentioned macroporous resin that has adsorbed precious metals is used for slurry roll coating and dried 30 minutes.

[0038] Use nano-platinum black 0.8g to carry out rolling on Al 2 o 3 The surface layer of the film was dried at 180°C for 12 hours. Pu...

Embodiment 3

[0040] Get 1.245 grams of chloroplatinic acid, 0.936 gram of chloropalladic acid and dissolve it in a certain amount of water. Under stirring, add 100 g of D301 macroporous weakly basic styrene-based anion exchange resin and stir evenly. The solution turns from orange red to colorless and transparent. , separate the solid and liquid, rinse with a small amount of water until no chloride ions in the filtrate can be detected with silver nitrate solution, and then put the resin in a drying oven at 60°C to dry.

[0041] CeO with an average particle size of 1 μm 2 -Al 2 o 3 12g of the powder is made into a slurry with an aqueous solution of methyl cellulose (methyl cellulose 3%), and ground into a uniform slurry with an agglomerated particle size of less than 30 microns with a three-roll mill, and the above-mentioned macroporous resin that has adsorbed precious metals is subjected to slurry rolling Apply and let dry for 30 minutes.

[0042] Use 0.400g of nano-platinum black and 0...

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Abstract

The invention discloses a macroporous spherical composite-material catalyst for removing benzene compounds in air and a preparation method and belongs to catalysts for catalyzing and purifying the pollution of the benzene compounds and preparation. The catalyst is made of loose and porous 2-5mm spherical particles formed by partly-burned macroporous resin, noble metal and metal oxide, and the surface and porous channels of the catalyst are internally filled with carbon-modified noble metal-oxide. The preparation comprises the following steps: exchanging ions in the channels, adhering the noble-metal ions, preparing the oxide into slurry, rolling-painting the slurry on the resin, then rolling-covering noble-metal nano particles, volatilizing and burning the resin by heat treatment, and obtaining the macroporous spherical composite-material catalyst. The catalyst can be placed into a gas chamber with a separating net, and by pumping gas needing to be purified, the particles flow to contact with the gas, and the contact area is large, and the particles cannot be blown into the gas chamber, and the catalyst has great practicability.

Description

technical field [0001] The invention belongs to the catalytic purification of gaseous benzene series, and relates to a catalyst for catalytic oxidation of benzene series in the air into pollution-free carbon dioxide and water. Background technique [0002] Benzene, toluene, xylene and other benzene series are commonly used organic solvents in industrial production and interior decoration materials. The volatile organic waste gases (VOCs) produced by them lead to a substantial increase in the content of benzene series in the air, which greatly endangers human health. Catalytic oxidation is a technology for burning and eliminating benzene series, which selectively catalyzes and oxidizes benzene series by controlling the combustion temperature, turning them into non-toxic CO 2 and H 2 O. Commonly used catalyst systems mainly include: metal oxide catalysts, supported catalysts containing noble metals. The temperature of the former for complete catalytic oxidation of benzene s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28B01J31/32B01J35/08B01J35/10B01D53/86B01D53/72
Inventor 韦群燕陈景赵庆玲潘其玲张文静黄章杰王世雄
Owner YUNNAN UNIV
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