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Catalyst for de-aromatic halogeno compound containing dioxina, carbon monoxide and nitrogen oxide and its use

A carbon monoxide and nitrogen oxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of reduced nitrogen oxide removal efficiency and catalyst availability Restrictions, price increases, etc.

Inactive Publication Date: 2005-06-08
KOCAT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Considering the invention of the above-mentioned patent, since the reaction of nitrogen oxides is carried out in a reducing atmosphere and dioxin and carbon monoxide are reacted in an oxidizing atmosphere, if the carrier and catalyst with high oxidizing ability are used to eliminate air pollutants, although the cited invention Can effectively remove dioxins and carbon oxides but the efficiency of nitrogen oxides removal is reduced
In addition, when noble metals are added to the catalyst to increase the catalyst activity, it also causes problems such as an increase in price and a limitation in the amount of catalyst available

Method used

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  • Catalyst for de-aromatic halogeno compound containing dioxina, carbon monoxide and nitrogen oxide and its use
  • Catalyst for de-aromatic halogeno compound containing dioxina, carbon monoxide and nitrogen oxide and its use
  • Catalyst for de-aromatic halogeno compound containing dioxina, carbon monoxide and nitrogen oxide and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Vanadium-molybdenum / titanium oxide catalyst [V-Mo / TiO 2 ] preparation

[0050] In deionized water, add oxalic acid (C 2 h 2 o 4 2H 2 O, produced by DUKSAN PURECHEMICALS CO., LTD., KOREA), after stirring the solution, ammonium metavanadate (NH 4 VO 3 , produced by Samchun Pure Chemical Co.Ltd., KOREA) and ammonium molybdate ((NH 4 )Mo 7 o 24 4H 2 O, produced by DUKSAN PURE CHEMICALS CO., LTD., KOREA) were charged together into the solution and then dissolved by vigorous stirring. As a procatalyst aqueous solution, titanium oxide DT51 (purchased from Millennium, FRANCE; with defined crystal structure - anatase 100%, specific surface area: 80 to 100 m 2 / g,SO 4 Content: 1 to 2 wt%), followed by vigorous stirring to produce a homogeneous slurry. Wherein, the materials such as titanium oxide, ammonium metavanadate, and ammonium molybdate are added in a weight ratio of 25.93:1:2.55 to generate the slurry. The prepared slurry is coated on the surface of the cordie...

Embodiment 2

[0052] Silver-vanadium-molybdenum / titanium oxide catalyst [Ag-V-Mo / TiO 2 ] preparation

[0053] The catalyst produced in Example 1 was prepared in silver nitrate (AgNO 3 , Han-Gyeul Gold Co., produced by KOREA), and then naturally dried overnight. Then the catalyst was dried at 120° C. for 4 hours, then the temperature was raised to 500° C. at 10° C. / min, and the catalyst was calcined at the same temperature for 2 hours to obtain the desired silver-vanadium-molybdenum / titanium oxide catalyst. The catalyst produced contained 0.84% ​​by weight of vanadium and 5.33% by weight of molybdenum and 2% by weight of silver (based on titanium oxide).

Embodiment 3

[0055] Silver-vanadium-molybdenum / titanium oxide-sulfuric acid catalyst [Ag-V-Mo / TiO 2 -SO 4 2- ] preparation

[0056] The catalyst produced in embodiment 2 was dissolved in 0.21M sulfuric acid aqueous solution (H 2 SO 4 · xSO 3 , Aldrich, produced in USA) and then dried naturally overnight. The catalyst was then dried at 120° C. for 4 hours, and then the temperature was raised to 500° C. at a rate of 10° C. / min, and the catalyst was calcined to obtain the desired silver-vanadium-molybdenum / titanium oxide-sulfuric acid catalyst. The catalyst produced contained 0.84% ​​by weight vanadium and 5.33% by weight molybdenum, 2% by weight silver and 2% by weight sulfate (based on titanium oxide).

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Abstract

A catalyst for removing the aromatic halogenated compounds including dioxin, CO and NOx is composed of titanium oxide as carrier, the metal element chosen from the metals in 6A family, and Ag. It may be treated by acid in such manner that it is immersed in the solution of sulfuric acid. Its advantage is high efficiency.

Description

technical field [0001] The present invention relates to a catalyst for simultaneously removing aromatic halogenated compounds including dioxins, carbon monoxide and nitrogen oxides and a method for preparing the catalyst, more particularly, to 0.1 to 5% of A catalyst of vanadium (by weight), 1 to 12% by weight of a Group 6A metal and 0.1 to 10% by weight of Ag or a catalyst prepared by acid treatment by impregnating said catalyst in a 0.05 to 1 M sulfuric acid solution. Background technique [0002] Since incineration of waste is one of the most efficient treatment methods in terms of waste volume reduction and recovered energy used in the process, it is widely used in countries with high population density and lack of landfill areas such as Korea. Recently, however, the requirement to protect the environment against air pollution has become increasingly noticeable, and it is therefore necessary to remove air pollutants such as dioxins, carbon monoxide, and nitrogen oxides c...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01J23/68
Inventor 金斗晟李镇九金琫洙李承宰贾明镇
Owner KOCAT
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