Methanol fuel automobile exhaust purification catalyst and preparation method thereof

A technology for purifying catalysts and automobile exhaust gas, which is applied in the directions of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of high maximum conversion efficiency, low precious metal content, low light-off temperature, etc. The effect of low and high specific surface area and low light-off temperature

Pending Publication Date: 2020-11-17
SINOCAT ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to aim at the CH that methanol fuel automobile produces 3 OH, CO and NO x Common pollutants such as methanol and the intermediate product CH 2 O and other unconventional pollutants tail gas evolution treatment problem, a methanol fuel vehicle tail gas purification catalyst and its preparation method are provided, the catalyst includes a catalyst carrier and a catalyst coating, the catalyst coating uses noble metals as active components, adopts sol-gel Two different composite oxide

Method used

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  • Methanol fuel automobile exhaust purification catalyst and preparation method thereof
  • Methanol fuel automobile exhaust purification catalyst and preparation method thereof
  • Methanol fuel automobile exhaust purification catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Dissolve zirconyl nitrate in water to prepare zirconyl nitrate solution, add zirconyl nitrate solution and aluminum nitrate to deionized water, stir and mix to form a salt solution, wherein the mass ratio of zirconyl nitrate and aluminum nitrate to deionized water is 1 :9, add ammonia water to adjust the pH of the salt solution to 8.8-9.5, and prepare the precipitate by co-precipitation method. After treatment, the material obtained by the co-precipitation method is roasted in an air atmosphere of 550 ° C for 3 h, and then continue to be heated at 900 ° C. Roasted in air atmosphere for 3h to get ZrO 2 -Al 2 o 3 , where ZrO 2 The mole percentage is 50%, ZrO 2 -Al 2 o 3 The particle size is 3-12μm, and the specific surface area is 93m 2 / g, pore volume 0.20ml / g; mix the palladium nitrate solution and the platinum nitrate solution evenly, and then load the ZrO prepared above by the equal volume impregnation method 2 -Al 2 o 3 , dried at 100°C for 5h, and then fire...

Embodiment 2

[0047] Dissolve zirconyl nitrate in water to prepare zirconyl nitrate solution, add zirconyl nitrate solution and aluminum nitrate to deionized water, stir and mix to form a salt solution, wherein the mass ratio of zirconyl nitrate and aluminum nitrate to deionized water is 1 :9, add ammonia water to adjust the pH of the salt solution to 8.8-9.5, and prepare the precipitate by co-precipitation method. After treatment, the material obtained by the co-precipitation method is roasted in an air atmosphere of 550 ° C for 3 h, and then continue to be heated at 950 ° C. Roasted in air atmosphere for 3h to get ZrO 2 -Al 2 o 3 , where ZrO 2 The mole percentage is 30%, ZrO 2 -Al 2 o 3 The particle size is 3-12μm, and the specific surface area is 98m 2 / g, pore volume 0.21ml / g; mix the palladium chloride solution and the platinum chloride solution evenly, and then load the ZrO prepared above by the equal volume impregnation method 2 -Al 2 o 3 , dried at 100°C for 5h, and then fi...

Embodiment 3

[0052] Dissolve zirconyl carbonate into nitric acid solution to prepare zirconyl carbonate solution, add zirconyl carbonate solution and aluminum nitrate to deionized water, stir and mix to form a salt solution, wherein the mass ratio of zirconyl carbonate and aluminum nitrate to deionized water is 1:9, add ammonia water to adjust the pH of the salt solution to 8.8-9.5, and prepare the precipitate by the co-precipitation method. After treatment, the material obtained by the co-precipitation method is roasted in an air atmosphere at 550 ° C for 3 hours, and then continue to be in the Calcined in air atmosphere at 850°C for 3h to obtain ZrO 2 -Al2 o 3 , where ZrO 2 The mole percentage is 70%, ZrO 2 -Al 2 o 3 The particle size is 3-12μm, and the specific surface area is 87m 2 / g, pore volume 0.19ml / g; tetraammine palladium nitrate solution and tetraamine platinum nitrate solution are mixed evenly, and then loaded onto the ZrO prepared above by equal volume impregnation metho...

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Abstract

The invention discloses a methanol fuel automobile exhaust purification catalyst and a preparation method thereof. The catalyst comprises a catalyst carrier and a catalyst coating, the catalyst coating comprises a first coating body and a second coating body, ZrO2-Al2O3 serves as a first carrier material of the first coating body, Pd and/or Pt serve/serves as a first active component of the firstcoating body, and ZrO2-Al2O3 is prepared through a coprecipitation method; the second coating takes CeO2-Al2O3 as a second carrier material and Rh as a second active component, the CeO2-Al2O3 is prepared by a sol-gel method, and the catalyst coating is smeared on the catalyst carrier in a layered form to obtain the methanol fuel automobile exhaust purification catalyst. The catalyst provided by the invention has the advantages of low noble metal consumption, low ignition temperature and high highest conversion efficiency, realizes efficient purification of conventional pollutants and unconventional pollutants in methanol fuel automobile tail gas, and can be used for purifying methanol fuel automobile tail gas according to different automobile types and tail gas treatment requirements. Andmethanol fuel automobile exhaust purification catalysts loaded with different noble metals are selected to realize cost control.

Description

technical field [0001] The invention relates to the application of catalytic technology and the field of environmental protection related to air pollution control, in particular to a methanol fuel vehicle exhaust gas purification catalyst and a preparation method thereof. Background technique [0002] The diversified development of vehicle fuels can make up for the gap between oil supply and demand to the greatest extent, and realize the sustainable development of energy and the environment. Among them, the alternative fuels for vehicles include natural gas, methanol, ethanol, liquefied petroleum gas, coal-to-oil and biodiesel. Methanol can be produced from coal, petroleum, natural gas and biomass. Based on the domestic energy characteristics of "rich coal, poor oil, and little gas", coal-based methanol is dominant, especially the use of high-sulfur, high-ash, and low-quality coal to prepare methanol . Methanol is prepared from low-quality coal, which realizes the effective...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J23/42B01J23/63B01J37/03B01J37/02B01J37/08B01D53/94B01D53/72B01D53/62B01D53/56
CPCB01J23/44B01J23/42B01J23/63B01J23/002B01J37/031B01J37/036B01J37/0201B01J37/088B01J37/0215B01J37/0244B01D53/945B01J2523/00B01J2523/31B01J2523/48B01J2523/824B01J2523/828B01J2523/3712B01J2523/822
Inventor 王云程永香杜洪仪王勤刘芳罗甜甜陈启章李云徐海迪王健礼淡宜陈耀强
Owner SINOCAT ENVIRONMENTAL TECH
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