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Base metal doped Pd/CeO2-Al2O3 catalyst and preparation method thereof

A ceo2-al2o3, catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of reducing the catalytic activity of the catalyst, so as to improve the catalytic activity And the effect of deep oxidation performance, improvement of reducibility, and widening of oxygen utilization window

Active Publication Date: 2019-01-15
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology

When methanol and CO exist in the system at the same time, due to this strong adsorption, CO will occupy the adsorption sites of methanol, thereby reducing the catalytic activity of the catalyst for methanol.

Method used

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  • Base metal doped Pd/CeO2-Al2O3 catalyst and preparation method thereof
  • Base metal doped Pd/CeO2-Al2O3 catalyst and preparation method thereof
  • Base metal doped Pd/CeO2-Al2O3 catalyst and preparation method thereof

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] The present invention adopts equal volume impregnation method to prepare La, Zr, Mn, Ba modified Pd / CeO 2 -Al 2 o 3 catalyst, using CO 2 -TPD,H 2 -TPR, BET and other characterization methods were used to characterize the catalyst, and its properties such as catalytic oxidation of methanol, resistance to CO inhibition and oxygen utilization rate were investigated. h 2 -TPR test results show that the doping of La, Zr, Mn, Ba and other base metals is beneficial to improve the reduction performance of the catalyst; CO 2 -TPD shows that the doping of promoters can significantly increase the basic sites and the stren...

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Abstract

The invention belongs to the technical field of catalyst preparation, and discloses a base metal doped Pd / CeO2-Al2O3 catalyst and a preparation method thereof. The Pd / CeO2-Al2O3 catalyst is doped by La and Ba; La can promote deep oxidation of methanol, and Ba can enhance the catalytic oxidation performance and CO depression resistant performance of methanol. Compared with a conventional three-waycatalyst (Pd / CeO2-ZrO2-Al2O3), based on CO2-TPD, the alkaline property of the catalyst surface is improved through auxiliary agent doping, the alkaline property of the catalyst surface is enhanced; the results of activity tests show that Ba, Mn, and La can improve the catalytic activity and deep oxidation performance of Pd / CeO2-Al2O3, moreover, the oxygen using window of the catalyst is largely enlarged; Ba has the best catalyst assisting performance and best CO depression resistant property; La has the best deep oxidation performance; and the reducing performance and surface alkalinity are the main factors that influence the catalytic conversion of methanol.

Description

technical field [0001] The invention belongs to the technical field of preparing catalysts, in particular to a base metal-doped Pd / CeO 2 -Al 2 o 3 Catalyst and method for its preparation. Background technique [0002] At present, the commonly used existing technologies in the industry are as follows: with the development of the global economy, the number of motor vehicles is increasing day by day, and the amount of gasoline consumed by motor vehicles in my country accounts for about one-third of the total gasoline consumption in the world. Gasoline emits a lot of CO, NOx, SO 2 Environmental problems such as harmful gases that pollute the environment and harm the human body, energy crisis, and smog have also become prominent. The air pollution caused by automobile exhaust is becoming more and more serious in cities, and automobile exhaust pollution has become one of the hot issues of environmental protection. my country is now facing the dual pressure of automobile energy...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01D53/94B01D53/72
CPCB01D53/72B01D53/94B01D2258/016B01J23/63
Inventor 张雪乔陈星仡郭梦圆
Owner CHENGDU UNIV OF INFORMATION TECH
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