Method and catalyst for performing low-temperature catalytic combustion to eliminate chlorination aromatic hydrocarbon

A chlorinated aromatic hydrocarbon, low-temperature catalysis technology, applied in combustion methods, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of secondary pollution, many by-products, low activity, etc., and achieves low cost and catalyst. Long life and high catalytic activity

Inactive Publication Date: 2014-08-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, V 2 o 5 -TiO 2 -TiO in -based catalyst 2 It is toxic and easy to cause secondary pollution, which limits its application
Although other types of catalysts such as solid acid catalysts have some applications, they have not been widely promoted due to low activity or many by-products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve commercially available 2g of sodium hydroxide and 5.3g of sodium carbonate in 100ml of water to form a mixed solution as solution A; dissolve commercially available 3.7g of lanthanum nitrate hexahydrate in 150ml of water, add 3.58g of 50% manganese nitrate solution Form a mixed solution as solution B; at room temperature, under the condition of stirring, add solution A dropwise to solution B to form a precipitate, and stand in air at room temperature for 12 hours; filter to obtain a filter cake, wash the filter cake to PH=about 7, 110 o Dry in an oven at C for 12 hours, take it out and grind it into powder, then move it to a muffle furnace for roasting. Its roasting process is: 50 o C starts heating, with 4 o The heating rate of C / min is programmed to heat up to 650 o C, 650 o C was kept for 5h to obtain undoped perovskite LaMnO 3 Catalyst, denoted as LMO.

Embodiment 2

[0022] Dissolve 2g of commercially available sodium hydroxide and 5.3g of sodium carbonate in 100ml of water to form a mixed solution as solution A; dissolve 2.96g of commercially available lanthanum nitrate hexahydrate and 0.423g of strontium nitrate in 150ml of water, add 3.58g 50% of the manganese nitrate solution forms a mixed solution as solution B; other experimental processes are consistent with Example 1, and the LaMnO of the Sr-doped perovskite structure is obtained. 3 Catalyst, denoted as LSMO.

Embodiment 3

[0024] Dissolve commercially available 2g sodium hydroxide and 5.3g sodium carbonate in 100ml water to form a mixed solution as solution A; dissolve commercially available 2.96g hexahydrate lanthanum nitrate and 0.868g hexahydrate cerium nitrate in 150ml water, add The 50% manganese nitrate solution of 3.58g forms a mixed solution as solution B; other experimental processes are consistent with Example 1, and the LaMnO of the Ce-doped perovskite structure is obtained. 3 Catalyst, denoted as LCMO.

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PUM

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Abstract

The invention relates to a catalyst for catalytically combusting chlorination aromatic hydrocarbon at low temperature. The catalyst is LaMnO3 with a perovskite structure doped with Sr, Ce, Mg, Al, Fe, Co, Ni and Cu. The catalyst is used for performing low-temperature catalytic combustion to eliminate chlorination aromatic hydrocarbon, is easy to prepare, low in cost, high in catalytic activity, good in heat stability and long in service life, does not have by-products or cause secondary pollution, and is particularly suitable for low-temperature catalytic combustion for eliminating chlorination aromatic hydrocarbon. In air, at relatively low reaction temperature, chlorination aromatic hydrocarbon in waste gas can be converted into carbon dioxide and hydrogen chloride, and completely combusted exhaust gas can be emptied after acid gases such as hydrogen chloride and chlorine are absorbed by a dilute alkali solution.

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 chlorinated aromatic hydrocarbons and the catalyst used. Background technique [0002] Chlorine-containing volatile organic compounds (CVOCs) 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. Therefore, many countries have now formulated strict environmental regulations for the emission of CVOCs. Chlorine-containing volatile hydrocarbons are divided into non-aromatic aliphatic hydrocarbon chlorides, such as dichloroethane, trichloroethylene, methyl chloride and polychloromethane, and aromatic hydrocarbon chlorides, such as chlorobenzene and dichlorobenzene. The former is produced in the process of preparing vinyl chloride by oxychlorine method in ...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J23/889F23G7/07
Inventor 卢媛娇王幸宜戴启广
Owner EAST CHINA UNIV OF SCI & TECH
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