Low-temperature denitrification catalyst and preparation method thereof

A low-temperature denitration and catalyst technology, applied in the field of denitration catalysts, can solve problems such as blockage of catalyst pores and impact on service life, and achieve the effects of improving activity, increasing sulfur resistance, and inhibiting accumulation.

Inactive Publication Date: 2014-05-28
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
View PDF5 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The core of SCR denitrification technology is the catalyst, and the research on catalytic materials has always been the research hotspot of SCR technology. At present, the denitrification catalyst currently used in my country is mainly based on titanium vanadium (V 2 o 5 /TiO 2 ) and WO 3 or MoO 3 Although the vanadium-based catalyst has high denitrification activity and the ability to resist sulfur dioxide, it must be active at a very high temperature (300-400°C), so this high-temperature SCR de

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Disperse 100g of titanium dioxide in 200ml of absolute ethanol, add 100ml of deionized water, and then dropwise add 100ml of oxalic acid solution with a mass fraction of 5%, to obtain a titanium dioxide ethanol suspension;

[0020] (2) Sonicate the above-mentioned titanium dioxide ethanol suspension for 30 minutes, add 2 g of ferric nitrate and 0.5 g of cerium nitrate, and continue to sonicate for 1 hour to obtain a catalyst precursor;

[0021] (3) Evaporate the solvent in the above precursor to obtain a solid powder, place it at 400°C for 2 hours, then add polyacrylamide and glass fiber for dry mixing, after stirring evenly, add glycerin and water for wet mixing, Obtain catalyst wet material;

[0022] (4) Extruding the above wet material with a honeycomb mold to obtain a honeycomb catalyst body;

[0023] (5) The above-mentioned green body was dried at 100° C. for 4 hours, and then calcined at 400° C. for 3 hours to obtain the low-temperature denitration catalyst. ...

Embodiment 2

[0027] (1) Take 100g of titanium dioxide and disperse it in 400ml of absolute ethanol, add 200ml of deionized water, and then dropwise add 200ml of oxalic acid solution with a mass fraction of 5%, to obtain a titanium dioxide ethanol suspension;

[0028] (2) Sonicate the above-mentioned titanium dioxide ethanol suspension for 30 minutes, add 3 g of iron oxide and 1 g of cerium nitrate, and continue to sonicate for 1 hour to obtain a catalyst precursor;

[0029] (3) Evaporate the solvent in the above precursor to obtain a solid powder, place it at 400°C for 2 hours, then add polyacrylamide and glass fiber for dry mixing, after stirring evenly, add glycerin and water for wet mixing, Obtain catalyst wet material;

[0030] (4) Extruding the above wet material with a honeycomb mold to obtain a honeycomb catalyst body;

[0031] (5) The above-mentioned green body was dried at 100° C. for 4 hours, and then calcined at 400° C. for 3 hours to obtain the low-temperature denitration cata...

Embodiment 3

[0035] (1) Disperse 100g of titanium dioxide in 200ml of absolute ethanol, add 100ml of deionized water, and then dropwise add 100ml of oxalic acid solution with a mass fraction of 5%, to obtain a titanium dioxide ethanol suspension;

[0036] (2) Sonicate the above-mentioned titanium dioxide ethanol suspension for 30 minutes, add 5 g of iron oxide and 0.7 g of cerium nitrate, and continue to sonicate for 1 hour to obtain a catalyst precursor;

[0037] (3) Evaporate the solvent in the above precursor to obtain a solid powder, place it at 400°C for 2 hours, then add polyacrylamide and glass fiber for dry mixing, after stirring evenly, add glycerin and water for wet mixing, Obtain catalyst wet material;

[0038] (4) Extruding the above wet material with a honeycomb mold to obtain a honeycomb catalyst body;

[0039] (5) The above-mentioned green body was dried at 100° C. for 4 hours, and then calcined at 400° C. for 3 hours to obtain the low-temperature denitration catalyst.

[...

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

No PUM Login to view more

Abstract

The invention discloses a low-temperature denitrification catalyst and a preparation method thereof. The catalyst takes titanium oxide as a carrier and ferric oxide as an active ingredient, and is doped with rare earth metal cerium, wherein the weight of ferric oxide accounts for 2-5% of that of titanium oxide, and the weight of rare earth metal cerium accounts for 0.5-1% of that of titanium oxide. The catalyst and the preparation method have the benefits that ferric oxide is added to the catalyst to serve as the active ingredient, so that the denitrification catalyst can exert the maximum catalytic activity within a temperature range of 200-400 DEG C; and in addition, cerium doping allows the activity of the catalyst to be improved greatly, can restrain generation of ammonium sulfate on the surface of the catalyst, and can improve the sulfur resistance of the catalyst.

Description

technical field [0001] The invention relates to a denitration catalyst, in particular to a low-temperature denitration catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides can produce photochemical smog, acid rain, ozone hole and greenhouse effect, and are one of the main pollutants in the atmosphere. The source of nitrogen oxides is mainly from the combustion of coal in transportation and thermal power generation. At present, flue gas denitrification is one of the effective methods to control the emission of nitrogen oxides in the process of coal combustion. Selective catalytic reduction (SCR) technology is due to its denitrification High efficiency, good selectivity, stable and reliable operation, etc., have been widely used in the flue gas denitrification process of coal-fired power plants. [0003] The core of SCR denitrification technology is the catalyst, and the research on catalytic materials has always been the research hotspot o...

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
IPC IPC(8): B01J23/83B01D53/86B01D53/56
Inventor 张庆丽徐辉
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & 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