Vanadium/Titania Catalyst Comprising Natural Manganese Ore for Removing Nitrogen Oxides and Dioxin in Wide Operating Temperature Range and Method of Using the Same

a technology of natural manganese ore and catalyst, which is applied in the direction of physical/chemical process catalyst, metal/metal-oxide/metal-hydroxide catalyst, etc., can solve the problems of reducing visibility distance, affecting the activity of catalyst, and affecting the health of human body, so as to achieve excellent nitrogen oxide removal, excellent denitrification performance, and remove dioxin

a technology of natural manganese ore and catalyst, which is applied in the direction of physical/chemical process catalyst, metal/metal-oxide/metal-hydroxide catalyst, etc., can solve the problems of reducing visibility distance, affecting the activity of catalyst, and affecting the health of human body, so as to achieve excellent nitrogen oxide removal, excellent denitrification performance, and remove dioxin

US20090142242A1Inactive Publication Date: 2009-06-04KOREA ELECTRIC POWER CORP
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  • Vanadium/Titania Catalyst Comprising Natural Manganese Ore for Removing Nitrogen Oxides and Dioxin in Wide Operating Temperature Range and Method of Using the Same
  • Vanadium/Titania Catalyst Comprising Natural Manganese Ore for Removing Nitrogen Oxides and Dioxin in Wide Operating Temperature Range and Method of Using the Same
  • Vanadium/Titania Catalyst Comprising Natural Manganese Ore for Removing Nitrogen Oxides and Dioxin in Wide Operating Temperature Range and Method of Using the Same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 3

Preparation of V / TiO2 (W) with Tungsten

[0072]12.35 g of ammonium tungstate ((NH4)2WO4) was dissolved in 30 ml of distilled water, and the resulting solution was heated to about 60° C. to completely dissolve it. After the solution was cooled to room temperature, 100 g of titania was added thereto to obtain a slurry. The slurry was heated to about 70° C. while stirring it to evaporate water therefrom. After the completion of the evaporation of water, a drying process was conducted at about 120° C. for 24 hours and then a calcination process was conducted at 500° C. for 10 hours in an air atmosphere, thus preparing a tungsten-titania mixed support. Subsequently, the same procedure as in Preparative Example 2 was conducted, resulting in a V / TiO2 catalyst having tungsten supported thereon, which is referred to as V / TiO2 (W).

example 1

[0073]The NMO of Preparative Example 1 was mixed with the V / TiO2 (N) catalyst of Preparative Example 2 through a ball milling process, thus preparing a mixed catalyst. The V / TiO2 (N) catalyst and NMO were mixed at a weight ratio of 10:1 and then ball milled.

example 2

[0074]A mixed catalyst was prepared in the same manner as in Example 1, with the exception that the NMO of Preparative Example 1 and the V / TiO2 (W) catalyst of Preparative Example 3 were used.

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Abstract

Disclosed is a vanadium / titania-based catalyst including natural manganese ore for removing nitrogen oxides and dioxin in a wide operating temperature range and a method of using the same. Specifically, this invention pertains to a vanadium / titania (V / TiO2)-based catalyst including natural manganese ore for removing nitrogen oxides and dioxin in a wide operating temperature range, in which the WTiO2 catalyst for selective catalytic reduction of nitrogen oxides and removal of dioxin contained in flue gas includes 5-30 wt % of natural manganese ore, thus exhibiting excellent activity of removing nitrogen oxides even in the low temperature range and of removing dioxin at the same time, and to a method of using the same. The catalyst of this invention has good thermal stability and thus can simultaneously manifest nitrogen oxides removal performance and dioxin removal performance superior to conventional vanadium / titania catalysts in a wide temperature range (150˜450° C.) including not only a high temperature range but also a low temperature range. As well, since unreacted ammonia emissions can be reduced, the formation of an ammonium salt is prevented and ammonium nitrate is decomposed at low temperatures, thus solving the problems of inactivation of the catalyst due to catalytic poisoning and of a shortened lifetime thereof, leading to economic benefits.

Description

TECHNICAL FIELD[0001]The present invention relates to a vanadium / titania-based (V / TiO2) catalysts comprising natural manganese ore (NMO) for removing nitrogen oxides and dioxin in a wide operating temperature range and a method of using the same. More particularly, the present invention relates to a V / TiO2 catalyst comprising NMO for removal of nitrogen oxides and dioxin in a wide operating temperature range, in which the V / TiO2 catalyst is mixed with NMO to increase the activity of removal of nitrogen oxides in the low temperature range so as to effectively remove nitrogen oxides and dioxin not only at high temperatures but also at low temperatures, and to a method of using the same.BACKGROUND ART[0002]Generally, fossil fuels are burned to produce energy for thermal power plants and industrial complexes, and also are burned in incinerators to decrease the volume of waste and to increase the chemical stability thereof. In such cases, various hazardous flue gases, such as carbon diox...

Claims

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Application Information

Patent Timeline
04 Jun 2009
Publication
US20090142242A1
IPC
B01J23/34; B01J23/22; B01J27/24; B01J27/135; B01D53/56
CPC
B01D53/8628; B01D2255/20707; B01D2255/20723; B01D2255/2073; B01D2255/20776; B01D2257/2064; B01D53/72; B01J23/22
Inventors
HONG, SUNG HO; LEE, JUN YUB