Preparation method of manganese dioxide nanosheet/CNT (carbon nano tube) denitration catalyst with core-shell structure

A denitration catalyst and carbon nanotube technology, which is applied in the nanomaterial preparation process and environmental protection field, can solve the problems of easy agglomeration of active component particles and difficulty in ensuring the dispersion of active components, and achieves a simple preparation process, good low-temperature denitration performance, and energy efficiency. low cost effect

Active Publication Date: 2013-05-01
SHANGHAI UNIV
View PDF3 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the impregnation method is mainly used in the preparation of catalysts to load the active components on the carrier. The particles ...

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
  • Preparation method of manganese dioxide nanosheet/CNT (carbon nano tube) denitration catalyst with core-shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve 0.1 g of potassium permanganate in 250 mL of deionized water to form a concentration of 2.5×10 -3 mol / L potassium permanganate solution, then add 0.2 g single-walled carbon nanotubes into the above solution, ultrasonically disperse for 0.5 h, wherein the mass ratio of potassium permanganate:carbon nanotubes is 0.9:1, then add hydrochloric acid In the above solution, adjust the pH value to 2, raise the temperature of the above solution to 60°C, reflux for 2 h under magnetic stirring, separate after cooling to room temperature, wash, and then dry to obtain the manganese dioxide nanosheet / carbon nanosheet Tube denitrification catalyst. The catalyst has a core-shell structure, the manganese dioxide nano-sheet is the shell, the carbon nano-tube is the core, and the manganese dioxide nano-sheet is uniformly coated on the surface of the carbon nano-tube.

[0021] Catalyst evaluation: Grind and sieve the prepared catalyst, take 20-40 mesh particles, put them into a f...

Embodiment 2

[0023] Dissolve 0.4 g of potassium permanganate in 500 mL of deionized water to form a concentration of 5 × 10 -3 mol / L potassium permanganate solution, then add 0.1 g multi-walled carbon nanotubes into the above solution, ultrasonically disperse for 1 h, wherein the mass ratio of potassium permanganate:carbon nanotubes is 7.3:1, then add oxalic acid In the above solution, adjust the pH value to 3, raise the temperature of the above solution to 70°C, reflux for 3 h under magnetic stirring, separate after cooling to room temperature, wash, and then dry to obtain the manganese dioxide nanosheet / carbon nanosheet Tube denitrification catalyst. The catalyst has a core-shell structure, the manganese dioxide nano-sheet is the shell, the carbon nano-tube is the core, and the manganese dioxide nano-sheet is uniformly coated on the surface of the carbon nano-tube.

[0024] Catalyst evaluation: Grind and sieve the prepared catalyst, take 20-40 mesh particles, put them into a fixed-bed ...

Embodiment 3

[0026] Dissolve 1 g of potassium permanganate in 1000 mL of deionized water to form a concentration of 6 × 10 -3 mol / L potassium permanganate solution, then add 1.4 g of multi-walled carbon nanotubes into the above solution, ultrasonically disperse for 1.5 h, wherein the mass ratio of potassium permanganate:carbon nanotubes is 1.3:1, then add acetic acid In the above solution, adjust the pH value to 4, raise the temperature of the above solution to 80°C, reflux for 4 h under magnetic stirring, separate after cooling to room temperature, wash, and then dry to obtain the manganese dioxide nanosheet / carbon nanosheet Tube denitrification catalyst. The catalyst has a core-shell structure, the manganese dioxide nano-sheet is the shell, the carbon nano-tube is the core, and the manganese dioxide nano-sheet is uniformly coated on the surface of the carbon nano-tube.

[0027]Catalyst evaluation: Grind and sieve the prepared catalyst, take 20-40 mesh particles, put them into a fixed-b...

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 relates to a preparation method of a manganese dioxide nanosheet/CNT denitration catalyst with a core-shell structure, and belongs to the field of environmental-friendly catalytic materials. A backflow method is used for preparing the catalyst; manganese dioxide nanosheets are prepared and coats a CNT evenly; and ammonia gas can be taken as a reducing agent at a certain temperature to convert nitric oxide into nitrogen and water through selective catalytic reduction. The preparation method is simple, and good in low-temperature activity; the prepared catalyst has an excellent desorption effect on nitric oxide in smoke; and the synthetic catalyst can be used for processing nitric oxide in smoke discharge by coal-fired power plants, garbage incinerators, steel mills and the like.

Description

technical field [0001] The invention relates to a preparation method of a manganese dioxide nanosheet / carbon nanotube core-shell structure denitration catalyst, which belongs to the field of nanomaterial preparation technology and environmental protection technology. Background technique [0002] The flue gas emitted by coal-fired power plants, steel mills, etc. contains a large amount of nitrogen oxides (NO x ), mainly NO and NO 2 Existence in the form of pollution will cause environmental problems such as acid rain, greenhouse effect, and ozone layer destruction, which will not only damage the ecological environment of the earth, but also cause great harm to human health. Therefore, flue gas denitrification technology is the focus and difficulty of research in the field of air pollution control in my country. [0003] At present, the most widely used and mature denitrification technology in the world is the selective catalytic reduction (SCR) denitrification technology,...

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): B01J23/34B01D53/86B01D53/56
Inventor 张登松施利毅方程李红蕊张剑平
Owner SHANGHAI UNIV
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