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

Co-based ammonia synthesis catalyst under mild condition and preparation method thereof

A catalyst, a technology for ammonia synthesis, which is used in the preparation/separation of ammonia, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve the problems of easy sintering and high cost of precious metal catalysts, and achieve low cost, good ammonia synthesis performance, Easy-to-use effects

Inactive Publication Date: 2019-03-29
FUZHOU UNIV
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal catalysts can exhibit excellent catalytic performance at lower pressures and lower temperatures, but due to the high cost of noble metal catalysts and the fact that they are easy to sinter at high temperatures, it is necessary to look for a low-temperature catalyst that is stronger than noble metals or compatible with noble metals in practical applications. It is necessary

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
  • Co-based ammonia synthesis catalyst under mild condition and preparation method thereof
  • Co-based ammonia synthesis catalyst under mild condition and preparation method thereof
  • Co-based ammonia synthesis catalyst under mild condition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step A: Weigh 15.194g of cerium nitrate hexahydrate and add 100ml of deionized water to prepare a 0.35mol / L cerium nitrate aqueous solution, add 7.408g of cobalt nitrate, stir rapidly for 0.5h, and then transfer the obtained solution to a 40°C In an oil bath, add 2mol / L KOH precipitant drop by drop under stirring conditions until complete precipitation and aging for 1h, then take it out and cool it to room temperature, then centrifuge several times, and dry at 120°C for 24h to obtain Co / CeO 2 .

[0026] Step B: 0.5g Co / CeO 2 The composite metal oxide was added to tris buffer solution (100mL, pH=8.5) containing dopamine (1mg / mL) and stirred for 24h. The suspension was separated by centrifugation, washed three times with deionized water and once with ethanol, and then dried under vacuum at 40 °C for 12 h.

[0027] Step C: The product obtained in step B is in N 2 Annealing treatment at 400°C for 2h in atmosphere.

[0028] Step D: The product obtained in step C is in O ...

Embodiment 2

[0030] Step A: Weigh 15.194g of cerium nitrate hexahydrate and add 100ml of deionized water to prepare a 0.35mol / L cerium nitrate aqueous solution, add 7.408g of cobalt nitrate, stir rapidly for 0.5h, and then transfer the obtained solution to a 40°C In an oil bath, add 2mol / L KOH precipitant drop by drop under stirring conditions until complete precipitation and aging for 1h, then take it out and cool it to room temperature, then centrifuge several times, and dry at 120°C for 24h to obtain Co / CeO 2 .

[0031] Step B: 0.5g Co / CeO 2 The composite metal oxide was added to tris buffer solution (100mL, pH=8.5) containing dopamine (1mg / mL) and stirred for 24h. The suspension was separated by centrifugation, washed three times with deionized water and once with ethanol, and then dried under vacuum at 40 °C for 12 h.

[0032] Step C: The product obtained in step B is in N 2 Annealing treatment at 500°C for 2h in the atmosphere.

[0033] Step D: The product obtained in step C is i...

Embodiment 3

[0035] Step A: Weigh 15.194g of cerium nitrate hexahydrate and add 100 ml of deionized water to prepare a 0.35mol / L cerium nitrate aqueous solution, then add 7.408g of cobalt nitrate, stir rapidly for 0.5h, and then transfer the obtained solution to 40 ℃ oil bath, add 2mol / L KOH precipitant drop by drop under the condition of stirring until complete precipitation and aging for 1h, then take it out and cool to room temperature, then centrifuge several times, and dry at 120℃ for 24h to obtain Co / CeO 2 .

[0036] Step B: 0.5g Co / CeO 2 The composite metal oxide was added to tris buffer solution (100mL, pH=8.5) containing dopamine (1mg / mL) and stirred for 24h. The suspension was separated by centrifugation, washed three times with deionized water and once with ethanol, and then dried under vacuum at 40 °C for 12 h.

[0037] Step C: The product obtained in step B is in N 2 Annealing treatment at 600°C for 2h in the atmosphere.

[0038] Step D: The product obtained in step C is i...

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 belongs to the field of catalyst material preparation and specifically relates to a Co-based ammonia synthesis catalyst under mild condition and a preparation method thereof. According to the invention, the preparation method comprises the following steps: synthesizing Co / CeO2; processing the Co / CeO2 with dopamine; and successively carrying out N2 and O2 mixed gas treatment to obtainthe Co / CeO2 catalyst; and then the ammonia synthesis catalytic performance of the catalyst is researched. In comparison with an untreated Co-based catalyst, the prepared Co / CeO2 catalyst has the following advantages: the ammonia synthesis rate is raised by 5.1 times under the condition of 1MPa; and the catalyst has extremely high heat stability and has obvious industrial application value.

Description

technical field [0001] The invention relates to the field of catalyst material preparation, in particular to a Co-based ammonia synthesis catalyst and a preparation method thereof. Background technique [0002] The synthetic ammonia industry occupies a very important position in the national economy. First of all, it is closely related to agriculture, which is the basis of the national economy, and is the main source of nitrogen fertilizer. Its output directly affects the development and stability of other chemical industries such as chemical fertilizers, dyes, and medicine. Secondly, the synthetic ammonia industry is an industry with large tonnage, high energy consumption and low efficiency. The standard to measure the quality of a synthetic ammonia industry is not the output of product ammonia, but the level of its energy consumption. In recent years, in order to meet the needs of agriculture, industry, medical treatment and so on. A large number of researchers at home ...

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): B01J23/83C01C1/04
CPCB01J23/83C01C1/04C01C1/0411Y02P20/52
Inventor 王秀云张天华江莉龙
Owner FUZHOU 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