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Nano Au catalyst for eliminating formaldehyde at room temperature and preparation method thereof

A technology for eliminating formaldehyde and catalysts, applied in the field of nano-gold catalysts, can solve the problems of secondary pollution and failure of chemical reagents, and achieve the effects of eliminating formaldehyde, good resistance to water vapor poisoning, good activity stability and service life

Inactive Publication Date: 2009-12-30
NO 63971 TROOPS PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical reaction method is effective in removing low-concentration formaldehyde in indoor air in a short period of time, but once the chemical reagent fails, it will also fail. In addition, the use of chemical reagents may cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of Au / FeOx / Al by Improved Impregnation Method 2 o 3 catalyst. Soak 1.0 g of spherical alumina in 0.5M ferric nitrate aqueous solution, immerse in equal volume, keep for 3 hours, then dry at 110°C for 6 hours, and roast at 500°C for 2 hours to obtain FeOx / Al 2 o 3 Composite oxide carrier. Take 0.5mL of 0.1M chloroauric acid solution, add it to distilled water, and wash with 0.5M Na 2 CO 3 The solution was adjusted to pH 7.0. Heating and maintaining the system temperature at 70°C. Take 1.0 g of the shaped composite oxide carrier, add it to the solution, and then pass it into steam, keep it in the steam environment for 10 hours, age, filter, wash, dry at 90°C for 12 hours, and then bake at 300°C, That is, Au:Fe:Al can be obtained 2 o 3 Catalytic materials in a weight ratio of 1:10:100. The finished product is in the shape of small balls, uniform black, and the strength is greater than 60N / piece.

[0029] The catalyst has a gas volume space velocity o...

Embodiment 2

[0031] Preparation of Au / CeO by coprecipitation method 2 catalyst. Mix 0.5mL of 0.1M chloroauric acid solution and 12mL of 0.1M cerium nitrate solution, and slowly add them dropwise to the vigorously stirred 0.2M Na 2 CO 3 in solution. Control the temperature of the reaction solution at 30°C and the pH value to 9 until the precipitation is complete, age for 2 hours, filter, wash with deionized water and ammonia water, dry at 80°C, and roast at 400°C to obtain Au:CeO 2 Catalysts in a weight ratio of 1:20. The finished product is gray powder.

Embodiment 3

[0033] Preparation of Au / TiO by Deposition and Precipitation 2 catalyst. Mix 0.5mL of 0.1M chloroauric acid solution and 12mL of purchased 0.1M cerium nitrate solution, mix well, and slowly add dropwise to strongly stirred 0.2M Na 2 CO 3 in solution. Control the temperature of the reaction solution at 30°C, the pH value is 9, until the precipitation is complete, age for 2 hours, filter, wash with deionized water and ammonia water, dry at 80°C, and roast at 400°C to obtain Au:TiO 2 Catalysts in a weight ratio of 1:20. The finished product is gray powder.

[0034] The catalyst has a gas volume space velocity of 4×10 at normal pressure for formaldehyde with a concentration of 800ppm. 4 h -1 time, the reaction temperature is 20°C, and the relative humidity of the environment is 50%, the formaldehyde can be completely converted into H 2 O and CO 2 .

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PUM

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Abstract

The invention relates to a loading type nano Au catalyst for eliminating formaldehyde in a room, a car and a microenvironment and a preparation method thereof. The corresponding nano Au catalyst is prepared mainly by adopting a coprecipitation method, a depositing precipitation method, an improved soaking method, and the like, taking metallic oxide, composite carrier oxide MOx / Al2O3, composite carrier oxide MOx / CeO2, glass, honeycomb ceramics and a metal mesh as matrixes and taking metallic oxide MOx as a second carrier. Compared with the prior art, the invention has the advantages that (1) the effect of eliminating the formaldehyde by 100 percent at room temperature can be achieved; (2) the nano Au catalyst has good steam poisoning resistance; (3) the CO is catalyzed to be completely converted into CO2; (4) the nano Au catalyst has the favorable active stability and the service life; and (5) the nano Au catalyst can be made into a molded catalyst to be applied in various occasions.

Description

technical field [0001] The invention is a nano-gold catalyst for eliminating formaldehyde at room temperature. The catalyst can be applied to environments such as indoors, cars, wood processing plants, decoration and decoration materials processing plants, hospital anatomy rooms, and other spaceships, spacecraft, submarines, etc. Elimination of formaldehyde in the microenvironment. Background technique [0002] Along with the raising of people's living standard, it is common phenomenon that people decorate living room and work room. Since the decoration and decoration materials used (such as artificial boards, paints, paints, etc.) inevitably contain harmful substances such as formaldehyde, if the decoration materials that do not meet the environmental protection requirements are used, they will be removed from the decoration materials for a long time after decoration. It is gradually released, causing the indoor free formaldehyde content to seriously exceed the standard, a...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/63B01J23/52B01J23/60B01D53/72B01D53/86
Inventor 王东辉史喜成
Owner NO 63971 TROOPS PLA
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