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

Catalyst for catalytic decomposition of N2O at medium and low temperature, preparation method and application

A low-temperature catalysis and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, separation method, etc. Active oxide sintering and other issues to achieve superior low-temperature catalytic activity, maintain continuous adsorption and desorption, and stable configuration characteristics

Active Publication Date: 2017-07-21
SHANXI UNIV
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, a fatal shortcoming of the above metal oxide catalysts is that there are few active metal oxide contact interfaces, and the active metal oxide nanoparticles are easy to detach from the support and interact with each other under the condition of long-term high-temperature reaction or the presence of water and oxygen in the reaction atmosphere. Agglomeration, sintering of active oxides and deactivation

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
  • Catalyst for catalytic decomposition of N2O at medium and low temperature, preparation method and application
  • Catalyst for catalytic decomposition of N2O at medium and low temperature, preparation method and application
  • Catalyst for catalytic decomposition of N2O at medium and low temperature, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (a) Weigh 1.82g Co(NO 3 ) 2 ·6H 2 O, 1.61g Co(acac) 2 (The total amount of Co ions is 0.0125mol, and the molar ratio of inorganic salt to organic salt is 1:1) and 35.1g (0.25mol) of hexamethylenetetramine are added to 1L of ethanol in a volume ratio of 2:1 and stirred Mix, and add 3.43 g of polyvinylpyrrolidone to the mixed solution to complete dissolution. (b) Continue to add 15 mL of 3wt% H to the mixed solution 2 O 2 After the solution system gradually turns black, the temperature is raised to 60° C. and vigorously stirred for 72 hours to obtain a highly uniformly dispersed nanoparticle suspension of cobalt tetraoxide. (c) Add 0.014g Zr(NO 3 ) 2 ·5H 2 O was dissolved in 210 mL of ethanol, and 30 mL of ethyl orthosilicate was added to it to obtain a mixed solution of ethyl orthosilicate zirconium nitrate in ethanol. (d) Add dropwise the mixed solution prepared in step (c) in situ to the suspension prepared in step (b), and add 10 mL of ammonia water, and continue the r...

Embodiment 2

[0046] (a) Weigh 1.19g CoCl 2 ·6H 2 O, 2.49g Co(Ac) 2 ·4H 2 O (the amount of Co ion total substance is 0.015mol, the mole fraction ratio of inorganic salt and organic salt is 0.5:1) and 42.2g (0.3mol) hexamethylenetetramine are added to 1L of ethanol aqueous solution with a volume ratio of 2.5:1 Stir and mix, and add 3.66 g of polyvinylpyrrolidone to the mixed solution to complete dissolution. (b) Continue to add 20mL of 3wt% H to the mixed solution 2 O 2 The solution, after the solution system gradually turns black, the temperature is raised to 55° C. and vigorously stirred for 12 hours to obtain a highly uniformly dispersed Co3O4 nanoparticle suspension. (c) 0.32g Zr(NO 3 ) 2 ·5H 2 O was dissolved in 150 mL of ethanol, and 15 mL of ethyl orthosilicate was added thereto to obtain a mixed solution of ethyl orthosilicate zirconium nitrate in ethanol. (d) Add dropwise the mixed solution prepared in step (c) in situ to the suspension prepared in step (b), and add 20 mL of ammonia ...

Embodiment 3

[0051] (a) Weigh 1.82g Co(NO 3 ) 2 ·6H 2 O, 1.61g Co(acac) 2 (The total amount of Co ion is 0.0125mol, and the mole fraction ratio of inorganic salt and organic salt is 1:1) and 28.1g (0.2mol) of hexamethylenetetramine are added to 1L of ethanol in a volume ratio of 2:1 and stirred Mix, and add 3.43 g of polyvinylpyrrolidone to the mixed solution to complete dissolution. (b) Continue to add 18 mL of 3wt% H to the mixed solution 2 O 2 After the solution system gradually turns black, the temperature is increased to 70° C., and the mixture is vigorously stirred for 24 hours to obtain a highly uniformly dispersed Co3O4 nanoparticle suspension. (c) Add 0.25g Zr(NO 3 ) 2 ·5H 2 O was dissolved in 210 mL of ethanol, and 30 mL of ethyl orthosilicate was added to it to obtain a mixed solution of ethyl orthosilicate zirconium nitrate in ethanol. (d) Add dropwise the mixed solution prepared in step (c) to the suspension prepared in step (b), and add 15 mL of ammonia, and continue the react...

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
Sizeaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a catalyst for catalytic decomposition of N2O at medium and low temperature. The catalyst comprises an active oxide inner core and a porous inert oxide shell layer, wherein the active oxide inner core consists of an active component Co3O4; the porous inert oxide shell layer consists of SiO2-NxOy; NxOy is one of ZrO2 and CeO2; and the catalyst comprises the following components by weight percentage: 10-40wt% of Co3O4, 0.1-3wt% of ZrO2 or CeO2, and the balance of SiO2. The catalyst has the advantages of good activity and long service life.

Description

Technical field [0001] The present invention belongs to a medium and low temperature catalytic decomposition of N 2 O catalyst, preparation method and application. Background technique [0002] With the development of chemical synthesis industries such as nitric acid and nylon 66 and the continuous consumption of fossil fuels, N 2 The O concentration continues to rise. N 2 O its greenhouse effect potential is CO 2 310 times as much as it is an important greenhouse gas. In addition, N 2 O can stably exist in the troposphere, and when it is transported to the stratosphere, it can cause the destruction of the ozone layer. Therefore, N 2 O elimination technology has become an important part of air pollution control research today. [0003] N in recent research 2 In the method of removing O, directly catalytically decomposes N 2 O generates O 2 And N 2 , Is currently the most effective and widely recognized elimination method. Therefore, the development of stable performance and high a...

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
CPCB01D53/8628B01D2255/2065B01D2255/20715B01D2255/20746B01D2255/30B01D2258/0283B01J23/83Y02C20/10
Inventor 王长真赵永祥王永钊李海涛
Owner SHANXI UNIV
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