Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Honeycombed SCR (selective catalytic reduction) denitrification catalyst with three-dimensional hierarchical pore structure and preparation method thereof

A technology of denitration catalyst and pore structure, applied in the field of honeycomb SCR denitration catalyst and preparation, to achieve the effects of high pressure crushing strength, improving compressive strength and large specific surface area

Active Publication Date: 2019-05-10
ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no literature and patent reports on the introduction of three-dimensional multi-level pore structures into honeycomb denitration catalysts.

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

[0027] A preparation method of a honeycomb SCR denitration catalyst with a three-dimensional multi-level pore structure, comprising the following steps:

[0028] (1) Disperse 0.2kg of multi-walled carbon nanotubes and 1.0kg of carbon black in a mixed acid solution with a total mass of 8kg of concentrated sulfuric acid and concentrated nitric acid, stir at 40°C for 3h, dilute with distilled water after cooling to room temperature, filter and wash until Neutral, the product is vacuum-dried at 75°C for 10 h, and ground into powder to obtain acidified multi-walled carbon nanotube and carbon black mixture powder; wherein the volume ratio of V (concentrated sulfuric acid): V (concentrated nitric acid) in the mixed acid solution is 3:1;

[0029] (2) Add the acidified multi-walled carbon nanotubes and carbon black mixture powder obtained above to 20kg of ammonia water with a concentration of 15%, and ultrasonically disperse for 0.5h at a power of 400W to obtain a mixed solution ①;

...

Embodiment 2

[0035] A preparation method of a honeycomb SCR denitration catalyst with a three-dimensional multi-level pore structure, comprising the following steps:

[0036] (1) Disperse 0.3kg of multi-walled carbon nanotubes and 1.5kg of carbon black in a mixed acid solution with a total mass of 10kg of concentrated sulfuric acid and concentrated nitric acid, stir at 40°C for 4h, dilute with distilled water after cooling to room temperature, filter and wash until Neutral, the product is vacuum-dried at 80° C. for 12 hours, and ground into powder to obtain acidified multi-walled carbon nanotube and carbon black mixture powder; wherein the volume ratio of V (concentrated sulfuric acid): V (concentrated nitric acid) in the mixed acid solution is 3:1;

[0037] (2) Add the acidified multi-walled carbon nanotubes and carbon black mixture powder obtained above to 20 kg of ammonia water with a concentration of 15%, and ultrasonically disperse for 1 hour at a power of 600W to obtain a mixed solutio...

Embodiment 3

[0043] A preparation method of a honeycomb SCR denitration catalyst with a three-dimensional multi-level pore structure, comprising the following steps:

[0044] (1) Disperse 0.1 kg of multi-walled carbon nanotubes and 0.5 kg of carbon black in a mixed acid solution with a total mass of 6 kg of concentrated sulfuric acid and concentrated nitric acid, stir at 40 ° C for 6 h, dilute with distilled water after cooling to room temperature, filter and wash until Neutral, the product is vacuum-dried at 80° C. for 12 hours, and ground into powder to obtain acidified multi-walled carbon nanotube and carbon black mixture powder; wherein the volume ratio of V (concentrated sulfuric acid): V (concentrated nitric acid) in the mixed acid solution is 3:1;

[0045] (2) Add the acidified multi-walled carbon nanotubes and carbon black mixture powder obtained above to 20 kg of ammonia water with a concentration of 15%, and disperse it ultrasonically for 2 hours at a power of 800W to obtain a mi...

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a honeycombed SCR (selective catalytic reduction) denitrification catalyst with three-dimensional hierarchical pore structure, prepared from, by weight, 80-100 parts of titanium dioxide, 1-2 parts of pulp cotton, 0.1-0.5 part of multi-walled carbon nanotubes, 0.5-2.5 parts of carbon black, 1-3 parts of silicon dioxide, 5-10 parts of glass fiber, 1-3 parts of ammonium metavanadate, 5-10 parts of ammonium metatungstate, 5-10 parts of cerium nitrate hexahydrate, 5-15 parts of monoethanolamine, 1-2 parts of carboxymethylcellulose, 1-2 parts of ethylene oxide, 5-15 parts oflactic acid, 1-2 parts of stearic acid, 15-25 parts of ammonia water, and 30-50 parts of deionized water. The invention also discloses a method of preparing the honeycombed SCR denitrification catalyst with three-dimensional hierarchical pore structure; the catalyst prepared herein has three-dimensional orderly-communicated pore network and mesopore structure, compression strength is improved, andthe large specific surface area of the catalyst is maintained.

Description

technical field [0001] The invention belongs to the technical field of industrial denitrification, and in particular relates to a honeycomb SCR denitrification catalyst with a three-dimensional multilevel pore structure and a preparation method. Background technique [0002] As a dry denitrification technology for removing nitrogen oxides in coal-fired flue gas, selective catalytic reduction denitrification method is widely used. It uses ammonia as a reducing agent to make NO and NO in flue gas 2 Reduction to generate N after passing through the catalyst layer 2 and H 2 O, to remove NO from flue gas x the goal of. Catalysts mostly use TiO 2 as the carrier, V 2 o 5 、WO 3 Porous media as the active component has many advantages such as high denitrification rate, good selectivity, stable operation, moderate temperature, etc., so it has been favored by researchers at home and abroad. Its core problem lies in the research, development and improvement of the catalyst. [...

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): B01J23/30B01J35/10B01J37/08B01D53/86B01D53/56
CPCB01J23/30B01D53/86B01D53/56B01J37/08B01J35/60
Inventor 项胜王光应宋剑徐奎魏彤陈友文
Owner ANHUI YUANCHEN ENVIRONMENTAL PROTECTION SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com