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Method and catalyst for low-temperature catalytic combustion elimination of polychlorinated aromatic hydrocarbon

A technology of polychlorinated aromatic hydrocarbons and low-temperature catalysis, which is applied in the direction of combustion methods, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effects of low price, strong resistance to chlorine poisoning, and long life

Inactive Publication Date: 2014-07-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is currently no information about MnxCo 3 -xO 4 Catalyst Used in Catalytic Combustion of Polychlorinated Aromatic Hydrocarbons

Method used

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  • Method and catalyst for low-temperature catalytic combustion elimination of polychlorinated aromatic hydrocarbon
  • Method and catalyst for low-temperature catalytic combustion elimination of polychlorinated aromatic hydrocarbon
  • Method and catalyst for low-temperature catalytic combustion elimination of polychlorinated aromatic hydrocarbon

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Dissolve commercially available 12.7g of sodium carbonate in 100ml of water to form a sodium carbonate solution as solution A; dissolve commercially available 7.3g of cobalt nitrate hexahydrate in 50ml of water to form a solution of cobalt nitrate as solution B; in an oil bath at 80°C , under the condition of stirring, add the A solution drop by drop to the B solution to form a precipitate, and let it stand in the air at room temperature for 12 hours; filter the filter cake, wash the filter cake to about PH=7, and dry it in an oven at 110°C for 12 hours. Take it out and grind it into powder, then move it to the muffle furnace for roasting. The calcination process is as follows: start heating at 50°C, program temperature increase at a heating rate of 1°C / min, raise the temperature to 500°C, and keep at 500°C for 4 hours to obtain pure tricobalt tetroxide catalyst.

Embodiment 2

[0030] Dissolve commercially available 12.72g of sodium carbonate in 100ml of water to form a sodium carbonate solution as solution A; dissolve commercially available 7.28g of cobalt nitrate hexahydrate in 50ml of water to form a cobalt nitrate solution, and then add 0.813g of 50% cobalt nitrate to the cobalt nitrate solution manganese nitrate solution to form a mixed solution of cobalt nitrate and manganese nitrate as solution B; in an oil bath at 80°C, under the condition of stirring, add solution A drop by drop to solution B to form a precipitate. Stand in the middle for 12 hours; filter to get the filter cake, wash the filter cake to about PH = 7, dry in an oven at 110°C for 12 hours, take it out and grind it into powder, then move it to a muffle furnace for roasting. The calcination process was the same as in Example 1 to obtain a manganese-doped tricobalt tetroxide catalyst with a molar ratio of cobalt to manganese of 11:1, which was designated as Co11Mn1 catalyst.

Embodiment 3

[0032] According to the method of Example 2, a cobalt-manganese composite oxide catalyst with a cobalt-manganese molar ratio of 9:1 was prepared, which was referred to as Co9Mn1 catalyst.

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Abstract

The invention relates to a catalyst for low temperature catalytic combustion of polychlorinated aromatic hydrocarbon. The catalyst is Fe, Ni, Cr, Bi or Mn doped with tricobalt tetroxide. The catalyst is used for low temperature catalytic combustion elimination of the polychlorinated aromatic hydrocarbon, and is high in activity, high in chlorine poisoning resistance, long in catalytic life and has few by-products, thus being especially suitable for eliminating the polychlorinated aromatic hydrocarbon by low temperature catalysis. In air, the catalyst can be used for stably converting the polychlorinated aromatic hydrocarbon in the waste into carbon dioxide and hydrogen chloride for a long time at the lower reaction temperature, and the activity of the catalyst is not lowered.

Description

technical field [0001] The invention belongs to the technical field of catalytic combustion and environmental protection, and in particular relates to a method for low-temperature catalytic combustion and elimination of polychlorinated aromatic hydrocarbons and the catalyst used. Background technique [0002] Polychlorinated aromatic hydrocarbon organic pollutants widely exist in industrial waste gas, waste incineration waste gas, and power plant waste gas, among which polychlorinated dibenzo-p-dioxin (PCDD) and polychlorinated diphenylfuran (PCDF) are highly toxic , carcinogenic, persistent organic pollutants that cause persistent and cumulative effects on biological systems. Therefore, many countries have now formulated strict environmental regulations for the discharge of PCDD / PCDF. Since these discharge processes are all industrial processes related to the national economy and the people's livelihood, the discharge of a large amount of polychlorinated aromatic hydrocarb...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J23/889F23G7/07
Inventor 蔡婷王幸宜戴启广
Owner EAST CHINA UNIV OF SCI & TECH
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