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Method for combination preparation of CuO/CeO2/gamma-Al2O by use of ultrasound-plasma

A plasma and combined preparation technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Catalyst activity and strength and other issues to achieve the effect of increased dispersion, reduced cost, and improved activity

Inactive Publication Date: 2008-08-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct application of existing sonochemical methods to prepare catalysts for catalytic combustion of VOCs still requires high-temperature calcination to activate, which will also make the catalyst easy to agglomerate and the carrier skeleton to be easily damaged, which will also affect the activity and strength of the catalyst.

Method used

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  • Method for combination preparation of CuO/CeO2/gamma-Al2O by use of ultrasound-plasma
  • Method for combination preparation of CuO/CeO2/gamma-Al2O by use of ultrasound-plasma
  • Method for combination preparation of CuO/CeO2/gamma-Al2O by use of ultrasound-plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The particle size is 40-60 mesh γ-Al 2 o 35 grams of particles were added to Cu(NO 3 ) 2 and 0.5mol / l Ce(NO 3 ) 3 According to the mixed solution of 23ml and 5ml, put it into an ultrasonic cleaner, and carry out ultrasonic impregnation at 30°C, the ultrasonic radiation frequency is 25kHz, the ultrasonic power is 240W, and the ultrasonic action time is 20min; then the sample is removed from the ultrasonic cleaner Take it out, filter, dry at 120°C for 2 hours, then put the dried particles in a radio frequency TCP plasma treatment device, and perform plasma treatment for 20min at a power of 200W to obtain CuO / CeO of the present invention 2 / γ-Al 2 o 3 Catalyst (labeled CuCeO-Us-Plas).

Embodiment 2

[0032] The particle size is 40-60 mesh γ-Al 2 o 3 5 grams of particles were added to Cu(NO 3 ) 2 and 0.5mol / l Ce(NO 3 ) 3 According to the mixed solution of 23ml and 5ml, put it into an ultrasonic cleaner, and carry out ultrasonic impregnation at 5°C, the ultrasonic radiation frequency is 10kHz, the ultrasonic power is 40W, and the ultrasonic action time is 1min; Take it out, filter, and dry at 140°C for 3 hours, then put the dried particles in a radio frequency FCP plasma treatment device, and perform plasma treatment at a power of 1W for 1min to prepare CuO / CeO 2 / γ-Al 2 o 3 Catalyst (labeled CuCeO-Us-Plas).

Embodiment 3

[0034] The particle size is 40-60 mesh γ-Al 2 o 3 5 grams of particles were added to Cu(NO 3 ) 2 and 0.5mol / l Ce(NO 3 ) 3 According to the mixed solution of 23ml and 5ml, put it into an ultrasonic cleaner, carry out ultrasonic impregnation at 50°C, the ultrasonic radiation frequency is 100kHz, the ultrasonic power is 1000W, and the ultrasonic action time is 120min; then the sample is removed from the ultrasonic cleaner Take it out, filter, dry at 120°C for 2 hours, put the dried particles in a radio frequency TCP plasma treatment device, and perform plasma treatment for 120min at a power of 1200W to obtain CuO / CeO of the present invention 2 / γ-Al 2 o 3 Catalyst (labeled CuCeO-Us-Plas).

[0035] The catalyst CuO / CeO prepared by the above-mentioned embodiment of the present invention and the prior art common impregnation method are prepared below 2 / γ-Al 2 o 3 (marked as CuCeO-ADS) catalytic activity compares; Simultaneously for further illustrating the effect of the p...

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Abstract

The invention relates to a method for using ultra-sonic-plasma to prepare CuO / CeO2 / gamma-Al2O catalyst, wherein said method comprises: (1) adding gamma-Al2O3 particles into the mixture solution of Cu (NO3)2 and Ce (NO3)3, and using ultra-sonic to accelerate the immersion; then using ultra-sonic to radiate at power as 40-1000W, to be fitlerd and dried to obtain the solid particles; (2) plasma processing the solid particles, to obtain the CuO / CeO2 / gamma-Al2O3 catalyst. The inventive catalyst has large specific surface, high disperse degree, while CuO is changed from crystal to high-disperse non-crystal at the surface of catalyst, and the catalyst has high activity, to catalyze and burn the VOCs at low temperature; and the inventive method can avoid expensive metal, with low cost.

Description

technical field [0001] The present invention relates to the preparation method of volatile organic compound (VOCs) combustion catalyst, relate in particular to a kind of ultrasonic-plasma joint preparation CuO / CeO 2 / γ-Al 2 O's method. Background technique [0002] The emission of volatile organic compounds (VOCs) is one of the main sources of environmental air pollution, which brings great harm to the earth's ecological environment and human health. Therefore, it is an urgent task to study efficient VOCs treatment technology. Among the current VOCs pollution control technologies, catalytic combustion is one of the most effective and economical technologies. [0003] In catalytic combustion technology, the catalyst is the key. At present, the catalysts used to control VOCs pollution are widely used as noble metal catalysts. Although they have high low-temperature activity, long service life, and can catalyze the combustion of various gases, they are expensive and lack res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/835B01J23/83
Inventor 李忠郭建光奚红霞夏启斌
Owner SOUTH CHINA UNIV OF TECH