Nickel-palladium integral type catalyst for purification of volatile organic pollutant and preparation method

A volatile organic and pollutant technology, applied in the field of palladium-nickel monolithic catalyst, can solve the problems of low catalyst activity and stability, high production cost, etc., and achieve the effects of excellent catalytic purification, reduced dosage and excellent performance.

Inactive Publication Date: 2006-05-10
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The object of the present invention is to provide a nickel-palladium monolithic catalyst for purification of volatile organic pollutants and its preparation method, to overcome the defects of low catalyst activity and stability and high production cost in the prior art, and to meet the requirements of modern industry. The need for industrial organic waste gas treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The cordierite honeycomb carrier (cell density 26 / cm 2 , the pore volume is 0.3 ml / g), and placed in a 110°C drying oven for use. Weigh 15 grams of γ-Al 2 o 3 , 3 grams of cerium-zirconium powder, and 0.3 gram of lanthanum nitrate were mixed together, then 80 milliliters of deionized water was added, stirred at room temperature, and the pH value was adjusted to 4 with nitric acid at the same time to prepare a coating slurry.

[0049] The support was then dipped in the coating slurry for 5 minutes in a vacuum vessel. After taking it out, blow it with air, dry it at 110°C for 10 hours, and then bake it in air at 400°C for 3 hours before use.

[0050] Measure 0.82ml of aqueous palladium chloride solution with a concentration of 0.0122g / ml, add 0.13g of nickel nitrate, and after dissolving, add deionized water to 25ml to prepare a mixed solution of the precursor salt of the active component. The active component was impregnated on the cordierite honeycomb ceramic carrie...

Embodiment 2

[0053] The cordierite honeycomb carrier (cell density 26 / cm 2 , the pore volume is 0.3 ml / g), and placed in a 110°C drying oven for use. Weigh 45 grams of γ-Al 2 o 3 , 3 grams of cerium-zirconium powder, and 1.5 grams of lanthanum nitrate were mixed together, then 80 milliliters of deionized water was added, stirred at room temperature, and the pH value was adjusted to 4 with nitric acid at the same time to prepare a coating slurry.

[0054] The support was then dipped in the coating slurry for 5 minutes in a vacuum vessel. After taking it out, blow it with air, dry it at 110°C for 10 hours, and then bake it in air at 600°C for 6 hours before use.

[0055] Measure 3.28ml of aqueous palladium chloride solution with a concentration of 0.0122g / ml, add 2.0g of nickel nitrate, dissolve and add deionized water to 25ml to prepare a mixed solution of the precursor salt of the active component. The active component was impregnated on the cordierite honeycomb ceramic carrier coated ...

Embodiment 3

[0057] The cordierite honeycomb carrier (cell density 26 / cm 2 , the pore volume is 0.3 ml / g), and placed in a 110°C drying oven for use. Weigh 30 grams of γ-Al 2 o 3 , 3 grams of cerium-zirconium powder, and 1.2 grams of lanthanum nitrate were mixed together, then 80 milliliters of deionized water was added, stirred at room temperature, and the pH value was adjusted to 4 with nitric acid at the same time to prepare a coating slurry.

[0058] The support was then dipped in the coating slurry for 5 minutes in a vacuum vessel. After taking it out, blow it with air, dry it at 110°C for 10 hours, and then bake it in air at 500°C for 4.5 hours before use.

[0059] Measure 2.46ml of aqueous palladium chloride solution with a concentration of 0.0122g / ml, add 0.74g of nickel nitrate, dissolve and add deionized water to 25ml to prepare a mixed solution of the precursor salt of the active component. The active component was impregnated on the cordierite honeycomb ceramic carrier coat...

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PUM

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Abstract

The invention discloses a nickel-palladium integrated catalyst used for purifying volatile organic contaminant and its relative preparing method. The inventive catalyst uses the cordierite cellular ceramic material with high pore capacity as carrier, the cerium zirconium solid solution, rare-earth oxide and aluminum oxide as coating, the palladium-nickel metallic oxide as catalysis activator. The invention also provides the method for preparing said catalyst. The invention has better catalysis and purifying property to volatile organic contaminant, while it can reduce the combustion initiation temperature of toluene to 200-205Deg. C, and it has better high-temperature resistance, while the best using temperature can reach 1000Deg. C, and the service life can last more than 2 years. The invention adds nickel with lower price into catalysis active component to reduce the cost of palladium, and its property is better than palladium catalyst.

Description

technical field [0001] The invention relates to a palladium-nickel monolithic catalyst, in particular to a catalyst used for catalytic purification of volatile organic pollutants and a preparation method thereof. Background technique [0002] The production of petrochemicals, solvents, reagents, coatings, paints, etc., as well as the development of spray paint, printing, home appliances, electromechanical, shoemaking, plastics, food processing, wood processing and other industries have resulted in hydrocarbons (such as benzene series, etc.) and their content Emission of volatile organic pollutants such as oxygen derivatives (such as aldehydes, ketones, esters, etc.). Most of the volatile organic pollutants have certain environmental toxicity, such as most of the pollutants are toxic, have a foul smell, and some even have carcinogenic effects; under sunlight, hydrocarbons, nitrogen oxides and oxidants undergo photochemical reactions to generate photochemical smog etc., causi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01D53/72B01D53/86B01J37/025
Inventor 张志刚卢冠忠江浩郭耘郭杨龙王筠松王艳芹刘晓晖
Owner EAST CHINA UNIV OF SCI & TECH
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