Automobile tail gas purifier high performance nano assembly catalyze coating material and method of preparing the same

A technology for automobile exhaust gas and catalytic coating, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. and other problems, to achieve the effect of improving bulk properties, improving high temperature thermal stability, and reducing reduction temperature.

Inactive Publication Date: 2008-08-27
FUZHOU UNIV ASSET MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Nanomaterials have a large specific surface area and can provide enough adsorption sites to promote high dispersion of catalyst active components, thereby reducing the amount of precious metals and relieving the pressure on catalyst produ...

Method used

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  • Automobile tail gas purifier high performance nano assembly catalyze coating material and method of preparing the same
  • Automobile tail gas purifier high performance nano assembly catalyze coating material and method of preparing the same
  • Automobile tail gas purifier high performance nano assembly catalyze coating material and method of preparing the same

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preparation example Construction

[0021] The preparation of alumina composite oxide nanomaterials is as follows: the nitrate or carbonate or oxychloride of Al, alkaline earth metal elements, transition metal elements and rare earth elements is prepared into a solution according to a certain composition ratio, and the solution is prepared at normal temperature and pressure, 100 Stirring speed of ~900rpm and in the presence of surfactants, co-precipitation or step-by-step co-precipitation with the precipitating agent, the pH value of the precipitation process is controlled at 7-10, and the stirring is continued for 3-24 hours under airtight conditions after the precipitation is completed. The obtained precipitate is filtered and washed, dried at 60-150°C, and roasted at 350-650°C for 3-5 hours. The composition ratio of the prepared alumina composite oxide nanomaterial is 60-90wt% of alumina, alkaline earth metal oxide 2-10wt% of metal oxides, 5-15wt% of transition metal oxides and 3-15wt% of rare earth oxides.

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Embodiment 1

[0032] The preparation mass percentage is the high specific surface aluminum oxide composite oxide of 80% of alumina, 5% of cerium oxide, 2.5% of zirconia, 2% of strontium oxide, 2% of lanthanum oxide, 4% of barium oxide and 4.5% of nickel oxide by step Co-precipitation method, prepare nitrate mixed solution A containing Al, La, Ba, Ni in proportion, prepare nitrate mixed solution B containing Ce, La, Sr and Zr oxychloride mixed solution B, weigh the quality of alumina 0.3 % PVA and ammonia water with a mass concentration of 10% were made into base solution C, and PEG with a mass concentration of 0.3% of alumina was weighed, 10% ammonia water with a mass concentration of 10% ammonium carbonate was made into lye D, and solution A was added under stirring Co-precipitation is carried out in liquid C, and the pH value of the precipitation is controlled to be 7.5 to 8. After the precipitation reaction is complete, the precipitation mixture E is obtained, and then B and D are added t...

Embodiment 2

[0034] Preparation composition is Ce 0.4 Zr 0.55 La 0.04 Y 0.01 o 1.98 The cerium-zirconium composite oxide nanomaterials, first prepare the mixed solution A2 of the nitrate of Ce, La, Y and Zr oxychloride in proportion, weigh the lauric acid and the mass concentration of 1% of cerium-zirconium oxide and be 10% The urea mixture C2, mix A2 and C2 and put it in the autoclave, raise the temperature to 80°C with stirring at a rate of 2°C / min and maintain it for 2 hours, then raise it to 180°C at 0.5°C / min for coprecipitation reaction After 12 hours, the reaction pressure is about 2.5Mpa. After the reaction, the temperature is naturally lowered to below 60°C under continuous stirring to obtain a precipitated mixture, filtered and washed 3 times, dried at 115°C, and calcined at 650°C for 4 hours to obtain a cerium-zirconium composite. oxide nanomaterials.

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Abstract

The invention provides a high performance nanometer combined catalytic coating material of an automobile tail gas purifier and preparation method thereof. The coating material is prepared from alumina composite oxides nano-material with high heat resistance and large specific surface area and cerium zirconium composite oxides nano-material of high oxygen storage property by ball milling at a certain ratio through nanometer combination technology, and controlling appropriate pore structure, surface structure and particle size under the action of certain assistant. The coating material can still retain original excellent performance of the nano-materials at 500-1100 DEG C. The inventive catalytic coating material retains original excellent performance of the nano-materials, has larger specific surface area and higher hydrogen storage capability compared with the prior material, and can be used in automobile tail gas catalyst for the purification of the automobile tail gas to realize low discharge and ultra-low discharge of automobile tail gas pollutant. The preparation method is scientific, reasonable, easy in operation and low in cost; and has remarkable socioeconomic benefit.

Description

technical field [0001] The invention belongs to the field of nano-catalyst materials, and more specifically relates to a high-performance nano-composite catalytic coating material for automobile exhaust purifiers and a preparation method thereof. Background technique [0002] As we all know, CO, HC and NOx in automobile exhaust are important sources of air pollution. As the most effective technology for purifying these three pollutants, automobile exhaust catalytic converter is widely used. Its core component is automobile exhaust catalyst. Automobile exhaust catalytic coating is an important component and carrier of automobile exhaust catalyst. The texture performance, oxygen storage performance and anti-aging performance of the coating material play a crucial role in the conversion effect of the catalyst. A large number of documents and patents have been reported on the research and development of automotive exhaust catalytic coatings. [0003] With the deterioration of a...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J23/63B01D53/94
Inventor 魏可镁肖益鸿蔡国辉詹瑛瑛翁希明魏笑峰
Owner FUZHOU UNIV ASSET MANAGEMENT CO LTD
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