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Method for eliminating chlorine-containing volatile organic compound by low-temperature catalytic combustion

An organic compound and volatile technology, applied in the direction of combustion methods, combustion types, incinerators, etc., can solve the problems of easy loss of catalyst active components, low catalytic combustion activity, short catalyst life, etc., and achieve a convenient and practical technical route. High catalytic activity and strong resistance to chlorine poisoning

Inactive Publication Date: 2010-12-29
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The catalysts used for the catalytic combustion elimination of the above-mentioned chlorinated and volatile hydrocarbons all have more or less shortcomings, such as low catalytic combustion activity, polychlorinated hydrocarbons are produced during the catalytic combustion process, which is easy to cause secondary pollution, and the catalyst activity group Parts are easy to lose, catalyst life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Commercially available 80mL tetrabutyl titanate Ti(OC 4 h 9 ) 4 , 320mL of absolute ethanol, 4mL of glacial acetic acid were mixed as solution A; 20mL of deionized water, 160mL of absolute ethanol, and 2mL of concentrated hydrochloric acid were mixed as solution B; under vigorous stirring, solution B was added dropwise to solution A, and Stir at a temperature of 60-70°C to form a transparent, stable light yellow sol, and then seal and age to form a gel. The gel was placed in an oven and dried at 70° C. for 12 hours to obtain a xerogel. Move the dry gel to a muffle furnace for calcination: the specific calcination process is: start heating at 50°C, program the temperature at a rate of 10°C / min, and maintain it at 480°C for 5 hours to obtain TiO 2 . After removal, the catalyst was pulverized to ensure that the catalyst was in powder form.

[0025] 0.386g ammonium metavanadate NH 4 VO 3 , 1.857g oxalic acid C 2 h 2 o 4 2H 2 O was added to 10mL deionized water, s...

Embodiment 2

[0027] 0.193g ammonium metavanadate NH 4 VO 3 , 0.929g oxalic acid C 2 h 2 o 4 2H 2 O was added to 10mL deionized water, stirred and mixed to prepare an impregnation solution, and added to 10g of commercially available titanium oxide TiO 2 , stirred until the impregnating solution is completely absorbed, let stand at room temperature for 12 hours, and then dried at 100°C for 12 hours. Catalyst roasting is the same as embodiment 1.1.5%VOx / TiO 2 . After taking it out, the powder catalyst is pressed into tablets, and after grinding, 40-60 mesh particles are screened.

Embodiment 3

[0029] 0.736g ammonium metavanadate NH 4 VO 3 , 3.714g oxalic acid C 2 h 2 o 4 2H 2 O was added to 10mL deionized water, stirred and mixed to prepare an impregnation solution, and added to 10g of commercially available titanium oxide TiO 2 , stirred until the impregnating solution is completely absorbed, let stand at room temperature for 12 hours, and then dried at 100°C for 12 hours. Catalyst roasting is the same as embodiment 1. 6%VOx / TiO 2 . After taking it out, the powder catalyst is pressed into tablets, and after grinding, 40-60 mesh particles are screened.

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PUM

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Abstract

The invention discloses a method for eliminating volatile chloroarene pollutants in environment by complete catalytic combustion. The method comprises the following steps of: introducing an oxide-supported rare earth oxide and a transition metal oxide serving as combustion catalysts and air serving as an oxidant into a reactor; completely combusting the chlorine-containing volatile arene under the action of the catalysts; converting the chlorine-containing volatile arene into carbon dioxide, hydrogen chloride and chlorine gas; and absorbing the complete combustion tail gas (acid gases such as the hydrogen chloride, the chlorine gas and the like) by using weak aqueous alkali and emptying the tail gas. The method has the advantages of high activity of the used catalysts, no byproduct, no secondary pollution, high chlorine poisoning resistance and long service life of the catalysts, and is especially suitable for eliminating halogen-containing organic compound, particularly the volatile chlorine-containing arene pollutants, by low-temperature complete catalytic combustion.

Description

technical field [0001] The invention belongs to the technical field of catalytic combustion environmental protection, in particular to a method for low-temperature catalytic combustion elimination of chlorine-containing volatile organic compounds. Background technique [0002] Chlorine-containing volatile hydrocarbons can not only cause serious harm to human health, but also cause lasting and cumulative effects on biological systems, and can destroy the atmospheric ozone layer. The 12 top persistent organic pollutants listed in the United Nations Environment Program International Treaty are all chlorine-containing organic compounds. Chlorine-containing volatile hydrocarbons are divided into chlorinated aromatic hydrocarbons, such as chlorobenzene and dichlorobenzene, and chlorinated non-aromatic aliphatic hydrocarbons, such as dichloroethane, trichloroethylene, tetrachloroethylene, methyl chloride and polychloromethane etc. The former is produced in bleaching of wood pulp w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/07F23G7/00
CPCY02A50/20
Inventor 王幸宜戴宇戴启广李到
Owner EAST CHINA UNIV OF SCI & TECH
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