Low-temperature catalytic combustion eliminating method of volatile chloro aryl hydrocarbons

A chlorinated aromatic hydrocarbon and volatile technology, which is applied in the field of low-temperature catalytic combustion and elimination of volatile chlorinated aromatic hydrocarbons, can solve the problems of easy loss of catalyst active components, low catalytic combustion activity, short catalyst life, and the like. The technical route is convenient and practical, the catalytic activity is high, and the anti-chlorine poisoning ability is strong.

Inactive Publication Date: 2010-07-07
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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  • Low-temperature catalytic combustion eliminating method of volatile chloro aryl hydrocarbons
  • Low-temperature catalytic combustion eliminating method of volatile chloro aryl hydrocarbons

Examples

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Effect test

Embodiment 1

[0025] Commercially available 25g magnesium nitrate (Mg(NO 3 ) 2 )·6H 2 O was dissolved in 80mL of ionized water, and the solution was placed in a constant temperature water bath at 50°C and stirred for 0.5h; then 120g of γ-alumina was added to the solution, stirring continuously during the process, and after the impregnating solution was completely absorbed by γ-alumina, Static, aged for 12 hours, then dried in an oven at 100°C for 24 hours, moved to a roaster, programmed temperature rise in air atmosphere, 1°C per minute, raised to 180°C, and kept for 2 hours; then programmed temperature rise, 10°C per minute, the When the temperature rises to 550°C and the temperature is kept for 4 hours, 3% MgO / γ-alumina can be obtained. 2% MgO / γ-alumina can be prepared by the same method.

[0026] Commercially available 50g cerium nitrate (Ce(NO 3 ) 3 )·6H 2 O and 6g copper nitrate Cu(NO 3 ) 2 )·3H 2 O was dissolved in 80mL of ionized water, and the solution was placed in a const...

Embodiment 2

[0028] Prepare 10% Fe by implementing the method of 1 2 o 3 -20% CeO 2 / 2%MgO / γ-alumina (by weight Fe 2 o 3 : CeO2 is 1:2) the catalyst is Example 2.

Embodiment 3

[0030] Using barium nitrate as raw material, the method in Example 1 was used to prepare 3% BaO / γ-alumina. Prepare 20% MnO by the method of implementation 1 2 -10%CeO 2 / 3%BaO / γ-alumina (by weight MnO 2 : CeO 2 is 2: 1) the catalyst is Example 3.

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Abstract

The method discloses a low-temperature catalytic combustion eliminating catalyst of volatile chloro aryl hydrocarbons, the catalyst is mainly composed of an alumina support modified by alkaline-earth metal, and loaded rare earth oxide and transition metallic oxide thereof; wherein the alkaline-earth metallic oxide includes magnesium oxide and barium oxide, the transition metallic oxide include one or more kinds of copper oxide, ferric oxide, vanadium pentoxide, manganese oxide, cobalt oxide and tungsten oxide, and the rare earth oxide is one or more kinds of lanthana oxide, cerium oxide, neodymium oxide and gadolinium oxide. The catalyst has high catalytic activity and no by-product generation, does not cause secondary pollution, and has strong anti-chlorin poisoning capacity and long catalyst life, and is particularly suitable for low-temperature catalytic combustion for removing halogen-contained organic compounds, especially for removing volatile chloro aryl hydrocarbon pollutants.

Description

technical field [0001] The invention belongs to the technical field of catalytic combustion environmental protection, and particularly relates to a method for eliminating volatile chlorinated aromatic hydrocarbons at low temperature by catalytic combustion. 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 w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83F23G7/06
Inventor 王幸宜李到吴勐戴宇
Owner EAST CHINA UNIV OF SCI & TECH
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