Method for preparing volatile organic compound oxidation catalyst by ultrasound-hydrogen reduction

A technology of organic compounds and oxidation catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of high cost and achieve cost reduction and hydrogen reduction temperature low effect

Active Publication Date: 2011-09-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst prepared by the present invention overcomes the disadvantage of high cost of traditional noble metal catalysts, and compared with traditional non-precious metal catalysts, the activity of the catalyst prepared by the present invention is significantly improved

Method used

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  • Method for preparing volatile organic compound oxidation catalyst by ultrasound-hydrogen reduction
  • Method for preparing volatile organic compound oxidation catalyst by ultrasound-hydrogen reduction
  • Method for preparing volatile organic compound oxidation catalyst by ultrasound-hydrogen reduction

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 1g TiO 2 Add 0.9mol / L of Cu(NO 3 ) 2 In the solution, impregnate in a constant temperature oscillating bed, the impregnation temperature is 30°C, and the impregnation time is 20h; then put it into an ultrasonic cleaner, and ultrasonically impregnate at 30°C for 30min, the ultrasonic radiation frequency is 45kHz, and the power is 300W; after impregnation, Put it in a vacuum dryer for drying, the drying temperature is 70°C, and the drying time is 12h; then it is placed in a muffle furnace, and it is roasted at 500°C for 5h to obtain solid particles; the obtained solid particles are placed in a fixed bed, and the volume flow 80mL / min H 2 Purging, while heating the bed to 300°C, and maintaining the temperature for 50min; then placing it in the air and roasting at 300°C for 1.5h to obtain the CuO of the present invention x / TiO 2 / HO catalyst (marked as CuO x -Us-HO-1).

Embodiment 2

[0039] 0.9mol / L Mn(CH 3 COO) 2 solution and 0.9mol / L Ce(NO 3 ) 3 The solution was mixed according to the volume ratio of 1:1, and 1g of TiO was added to it 2 , impregnated in a constant temperature oscillating bed, the impregnation temperature is 30°C, and the impregnation time is 22h; then put it into an ultrasonic cleaner, and ultrasonically impregnate at 30°C for 70min, the ultrasonic radiation frequency is 45kHz, and the power is 450W; Dry in a vacuum desiccator at a drying temperature of 120°C and a drying time of 15h; then place in a muffle furnace and roast at 700°C for 7h to obtain solid particles; place the obtained solid particles in a fixed bed at a volume flow rate of 80mL / minH 2 Purging, while heating the bed to 350°C, and maintaining the temperature for 20min; then placing it in the air and roasting at 400°C for 3h to obtain the Mn 1 Ce 1 o x / TiO 2 / HO catalyst (marked as Mn 1 Ce 1 o x -Us-HO-1).

Embodiment 3

[0041] 0.9mol / L Cu(NO 3 ) 2 solution and 0.9mol / LMn(CH 3 COO) 2 The solution was mixed according to the volume ratio of 1:1, and 1g of TiO was added to it 2 , impregnated in a constant temperature oscillating bed, the impregnation temperature is 30°C, and the impregnation time is 24h; then put it into an ultrasonic cleaner, and ultrasonically impregnate at 30°C for 30min, the ultrasonic radiation frequency is 45kHz, and the power is 300W; Dry in a vacuum desiccator at a drying temperature of 80°C and a drying time of 15h; then place in a muffle furnace and roast at 550°C for 6h to obtain solid particles; place the obtained solid particles in a fixed bed at a volume flow rate of 80mL / minH 2 Purging, while heating the bed to 350°C, and maintaining the temperature for 30min; then placing it in the air and roasting at 300°C for 1.5h to obtain the Cu 1 mn 1 o x / TiO 2 / HO catalyst (marked as Cu 1 mn 1 o x -Us-HO-1).

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Abstract

The invention discloses a method for preparing a volatile organic compound oxidation catalyst by ultrasound-hydrogen reduction, comprising the following steps of: adding TiO2 particles into mixed solution of Cu(NO3)2, Mn(CH3COO)2 and Ce(NO3)3, impregnating in a constant-temperature oscillation bed and then in an ultrasonic wave generator, drying, and roasting, thus solid particles are obtained; and carrying out reduction on the solid particles under the atmosphere of H2, and roasting the solid particles in the air again, thus Cuy1Mny2Cey3Ox/TiO2/HO catalyst capable of catalyzing oxidation reaction of volatile organic compound is obtained. The catalyst prepared by the invention has low hydrogen reduction temperature, and high-dispersion high-activity spinel structure CuMn2O4 crystalline phase is formed on a porous material carrier; the activity for catalyzing oxidation reaction of the volatile organic compound is high; meanwhile, the method requires no precious metal, thus the cost is greatly reduced compared with that of the method using a precious metal catalyst.

Description

technical field [0001] The invention relates to a preparation method of a volatile organic compound oxidation catalyst, in particular to a method for preparing a volatile organic compound oxidation catalyst through the combination of ultrasound and hydrogen. Background technique [0002] Volatile organic compounds (VOCs) refer to various organic compounds with a boiling point of 50°C to 260°C at room temperature. The emission of VOCs is one of the main causes of environmental air pollution. It has brought catastrophic harm to the earth's environment and human health, and has aroused widespread public concern. It is imminent to control VOCs pollution. Among the current technologies for controlling VOCs pollution, catalytic oxidation is one of the most effective and economical technologies. [0003] In catalytic oxidation technology, the performance of the catalyst has a decisive impact on the catalytic efficiency and the reduction of operating costs. At present, the catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/34B01J23/889B01J37/18B01J37/34B01D53/86B01D53/72
Inventor 李忠李欣潘红艳夏启斌刘志猛
Owner SOUTH CHINA UNIV OF TECH
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