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Dust adhesion-resistant coated denitration catalytic sphere and preparation method thereof

A nitro-catalyzed ball and dust prevention technology, applied in chemical instruments and methods, separation methods, catalyst protection and other directions, can solve the problems of catalysts being easily blocked by fly ash, poisoning, etc., and achieve the effect of preventing adhesion and reducing costs.

Active Publication Date: 2011-06-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcoming that the catalyst is easily blocked by fly ash and cause poisoning in the existing SCR process, and to provide a catalytic ball that makes the catalyst not adhere or rarely adhere to fly ash and its preparation method

Method used

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  • Dust adhesion-resistant coated denitration catalytic sphere and preparation method thereof
  • Dust adhesion-resistant coated denitration catalytic sphere and preparation method thereof

Examples

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example 1

[0011] MnO with porous polytetrafluoroethylene as the shell and activated carbon as the carrier 2 -CeO 2 The base depinning catalyst is the filler. Use dispersed polytetrafluoroethylene to mold into a hemispherical shell body with an inner diameter of 8mm and a shell wall thickness of 1mm, and then sinter it at 350°C to form a hemispherical shell, and then use a puncher to punch a uniform hole diameter of 0.3 mm through hole. Then, 0.1 g of granular activated carbon with a particle size of 1 mm loaded with catalyst is loaded into the hemisphere, and finally the two hemispheres are formed into an integral sphere by thermocompression welding, thereby making a packaged denitration catalyst.

example 2

[0013] MnO with porous polytetrafluoroethylene as the shell and activated carbon as the carrier 1.7 -CeO 2 The base depinning catalyst is the filler. Use dispersed polytetrafluoroethylene to mold into a semi-spherical shell green body with an inner diameter of 10 mm and a shell wall thickness of 1.5 mm, and then sinter it at 350 ° C to form a semi-spherical shell, and then use a puncher to punch a uniform hole diameter of 0.5mm through hole. Then, 0.2 g of granular activated carbon with a particle size of 3 mm loaded with catalyst is loaded into the hemisphere, and finally the two hemispheres are formed into an integral sphere by thermocompression welding, thereby making a packaged denitration catalyst.

example 3

[0015] MnO with porous polytetrafluoroethylene as the shell and activated carbon as the carrier 1.5 -CeO 2 The base depinning catalyst is the filler. Use dispersed polytetrafluoroethylene to mold into a semi-spherical shell green body with an inner diameter of 10 mm and a shell wall thickness of 1.3 mm, and then sinter it at 350 ° C to form a semi-spherical shell, and then use a punching machine to punch a uniform hole diameter of 0.4mm through hole. Then, 0.15 g of granular activated carbon with a particle size of 2 mm loaded with catalyst is loaded into the hemisphere, and finally the two hemispheres are formed into an integral sphere by thermocompression welding, thereby making a packaged denitration catalyst.

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Abstract

The invention discloses a dust adhesion-resistant coated denitration catalytic sphere and a preparation method thereof, and belongs to the technical field of denitration catalysis. The catalytic sphere has a core-shell structure, the shell is polytetrafluoroethylene and is provided with uniform through holes, and a MnO2-X-CeO2-based denitration catalyst with an active carbon carrier is used as a filler. The preparation method comprises the following steps of: preparing hemispheres of the polytetrafluoroethylene shell; drilling holes on the hemispheres; and filling the MnO2-X-CeO2-based denitration catalyst with the active carbon carrier in the hemispheres and forming a whole sphere by using a hot-pressing welding method to obtain the coated denitration catalytic sphere. The dust is prevented from being adhered to the catalyst, so that the catalyst achieves effect for a longer time in a greater degree.

Description

technical field [0001] The invention relates to a packaged denitrification catalytic ball for preventing dust adhesion and a preparation method thereof, belonging to the technical field of off-stock catalysis. Background technique [0002] Nitrogen oxides (NOx) are the main air pollutants, mainly including NO, NO 2 , N 2 O, etc., can cause acid rain, photochemical smog, greenhouse effect and the destruction of the ozone layer. There are two ways to reduce NOx emissions: combustion process control and post-combustion flue gas denitrification. Among the existing flue gas denitrification processes, Selective Catalytic Reduction (SCR, Selective Catalytic Reduction) denitrification is the mainstream process. The catalyst plays a decisive role in the process and is the key to the SCR technology, and its activity is crucial to the normal operation of the denitrification device. At the same time, the operating cost of the SCR device also depends to a large extent on the life of ...

Claims

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Application Information

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IPC IPC(8): B01J31/32B01J35/08B01J33/00B01D53/90B01D53/56
Inventor 崔素萍严建华秦魏杜鑫郭红霞刘庆祎刘启栋谢凯
Owner BEIJING UNIV OF TECH
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