Wide-temperature denitration catalyst and preparation method thereof

A denitrification catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high mechanical strength requirements, unguaranteed service life, easy collapse or peeling of catalysts, etc. , to achieve good denitrification efficiency, improve the ability to resist arsenic poisoning, and make it easier to decompose

Active Publication Date: 2018-10-09
DATANG NANJING ENVIRONMENTAL PROTECTION TECH
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem facing these industrial furnaces and kilns in denitrification is the low flue gas temperature (180-350°C). Currently, commercial catalysts operating continuously in this temperature range have problems such as low denitrification activity, easy sulfur poisoning, and short service life. In addition, the cement industry with particularly high dust content in the flue gas also requires high mechanical strength of the catalyst. Existing commercial catalysts are prone to collapse or peel off under high dust washing, and the service life cannot be guaranteed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wide-temperature denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve picric acid in ethanol to prepare a 0.01mol / L solution, then add deionized water, hydrochloric acid (concentration 37.5%), tetrabutyl titanate, antimony trichloride, stir well to obtain a hydrothermal solution, hydrothermal The volume ratio of ethanol, deionized water and hydrochloric acid in the solution is 1:3:2, the concentration of tetrabutyl titanate is 0.1mol / L, and the concentration of antimony trichloride is 0.001mol / L; The titanium substrate was placed in a reaction kettle, and kept at 140°C for 2 hours. After the reaction, the reaction kettle was naturally cooled to room temperature, and the titanium substrate was taken out, washed with ethanol and deionized water repeatedly to obtain a catalyst carrier; Add ammonium metavanadate to the ethanolamine solution, and after it is completely dissolved, add deionized water, cerium nitrate, and ammonium heptamolybdate, and stir evenly to obtain an impregnation solution. The concentration of ammonium metavanada...

Embodiment 2

[0031] Dissolve tartaric acid in ethanol to prepare a 0.03mol / L solution, then add deionized water, hydrochloric acid (concentration 37.5%), tetrabutyl titanate, antimony acetate, stir well to obtain a hydrothermal solution, and ethanol in the hydrothermal solution The volume ratio of , deionized water and hydrochloric acid is 1:4:2, the concentration of tetrabutyl titanate is 0.3mol / L, and the concentration of antimony acetate is 0.01mol / L; the hydrothermal solution and the cleaned titanium substrate are placed in the reaction In the kettle, keep warm at 160°C for 4h. After the reaction, the reaction kettle was naturally cooled to room temperature, and the titanium substrate was taken out, washed with ethanol and deionized water repeatedly to obtain a catalyst carrier; Ammonium vanadate, after being completely dissolved, add deionized water, cerium nitrate, ammonium heptamolybdate, and stir evenly to obtain an impregnating solution. The ratio is 1:0.5:10; according to the are...

Embodiment 3

[0034]Dissolve oxalic acid and citric acid in ethanol to prepare a 0.055mol / L solution, then add deionized water, hydrochloric acid (concentration 37.5%), tetrabutyl titanate, antimony nitrate, and stir to obtain a hydrothermal solution. The volume ratio of ethanol, deionized water, and hydrochloric acid in the solution is 1:4.5:2.5, the concentration of tetrabutyl titanate is 0.55mol / L, and the concentration of antimony nitrate is 0.02mol / L; the hydrothermal solution and the cleaned titanium substrate Put it in a reaction kettle and keep it warm at 180°C for 8 hours. After the reaction, the reaction kettle was naturally cooled to room temperature, and the titanium substrate was taken out, and washed with ethanol and deionized water repeatedly to obtain a catalyst carrier; Ammonium metavanadate was added to the solution, and after being completely dissolved, deionized water, cerium nitrate, and ammonium heptamolybdate were added, and the impregnation solution was obtained after...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
abrasion resistanceaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a wide-temperature denitration catalyst and a preparation method thereof. The catalyst uses an antimony doped titanium dioxide nanorod array as a carrier, uses vanadium pentoxide as an active ingredient and uses molybdenum oxide and cerium oxide as auxiliary agents. The titanium dioxide nanorod array is directly grown on a base plate by a hydrothermal method; the combiningforce of titanium dioxide and the base plate is enhanced, so that the catalyst has high abrasive resistant intensity and long service life; through the ordered arrangement of the titanium dioxide nanorod array, the specific surface area can be improved; the active sites are increased; the catalyst activity is improved; titanium dioxide is subjected to antimony doping, so that the sulfur poisoningresisting performance of the catalyst can be enhanced. Cerium oxide and molybdenum oxide are loaded on the carrier, so that low-temperature activity of the catalyst can be improved; the reaction temperature is expanded; the catalyst has high denitration efficiency, high stability and high selectivity in a temperature range of 150 to 420 DEG C. The catalyst can be widely applied to various industrial furnace SCR denitration systems.

Description

technical field [0001] The invention relates to a wide-temperature denitrification catalyst and a preparation method thereof, belonging to the technical field of high-efficiency catalysts and air pollutant prevention and control. Background technique [0002] Selective catalytic reduction (SCR) denitrification is one of the most widely used and most mature flue gas denitrification technologies in the world. The core of its technology is the use of denitrification catalysts, which have the advantages of high purification rate and reliable operation. The denitrification catalyst used in coal-fired power plants has been commercially used for many years, and the technology is relatively mature. The operating temperature of this type of medium-high temperature catalyst is usually 320-420°C. However, in the face of the increasingly severe pollution control situation, the nitrogen oxide emissions of other industrial furnaces will also be strictly controlled. Coking, cement, glass, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J37/10B01J37/02B01J37/08B01J35/10B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J23/28B01J35/1019B01J37/0201B01J37/088B01J37/10
Inventor 李倩王虎黄力纵宇浩董晓真严巍常峥峰
Owner DATANG NANJING ENVIRONMENTAL PROTECTION TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap