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

A kind of ruthenium series ammonia synthesis catalyst and its preparation method and application

A technology of ammonia synthesis and catalyst, applied in the field of ruthenium ammonia synthesis catalyst and its preparation, can solve the problems of poor stability and low catalytic performance, achieve the effects of preventing agglomeration, improving catalytic activity and avoiding direct contact

Active Publication Date: 2021-11-19
FUZHOU UNIV ASSET MANAGEMENT CO LTD +2
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved in the present invention is to overcome the defects of poor stability and low catalytic performance of the ruthenium-based ammonia synthesis catalyst in the prior art, thereby providing a ruthenium-based ammonia synthesis catalyst and its preparation method and application

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
  • A kind of ruthenium series ammonia synthesis catalyst and its preparation method and application
  • A kind of ruthenium series ammonia synthesis catalyst and its preparation method and application
  • A kind of ruthenium series ammonia synthesis catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The present embodiment provides a kind of ruthenium series ammonia synthesis catalyst, and its preparation method is as follows:

[0055] The preparation method of graphitized activated carbon: Take 20g of activated carbon and crush it to 15-20 mesh, put it in an intermediate frequency furnace, treat it in an argon atmosphere at 1800 ° C for 2 hours, cool it to room temperature in the above atmosphere, and use air oxidation at 400 ° C to expand the pores , that is graphitized activated carbon, the specific surface area of ​​the graphitized activated carbon is 800m 2 / g, the pore volume is 0.5cm 3 / g.

[0056] Preparation of mixed solution: add ruthenium nitrosonitrate, barium nitrate, cerium nitrate, and potassium nitrate into deionized water in a ratio of 2:3:1:3 with the mass ratio of ruthenium, barium, cerium, and potassium, and stir evenly. The pH of the solution was adjusted to 1 with nitric acid.

[0057] Catalyst preparation: Take 10 g of the above-mentioned g...

Embodiment 2

[0061] The present embodiment provides a kind of ruthenium series ammonia synthesis catalyst, and its preparation method is as follows:

[0062] The preparation method of graphitized activated carbon: Take 20g of activated carbon and crush it to 15-20 mesh, put it in an intermediate frequency furnace, treat it in an argon atmosphere at 1800 ° C for 2 hours, cool it to room temperature in the above atmosphere, and use air oxidation at 400 ° C to expand the pores , that is graphitized activated carbon, the specific surface area of ​​the graphitized activated carbon is 800m 2 / g, the pore volume is 0.5cm 3 / g.

[0063] Preparation of mixed solution: add ruthenium nitrosonitrate, barium nitrate, cerium nitrate, and potassium nitrate into deionized water in a ratio of 2:3:1:3 with the mass ratio of ruthenium, barium, cerium, and potassium, and stir evenly. The pH of the solution was adjusted to 2 with acetic acid.

[0064] Catalyst preparation: Take 10 g of the above-mentioned g...

Embodiment 3

[0068] The present embodiment provides a kind of ruthenium series ammonia synthesis catalyst, and its preparation method is as follows:

[0069] The preparation method of graphitized activated carbon: Take 20g of activated carbon and crush it to 15-20 mesh, put it in an intermediate frequency furnace, treat it in an argon atmosphere at 1800 ° C for 2 hours, cool it to room temperature in the above atmosphere, and use air oxidation at 400 ° C to expand the pores , that is graphitized activated carbon, the specific surface area of ​​the graphitized activated carbon is 800m 2 / g, the pore volume is 0.5cm 3 / g.

[0070] Preparation of mixed solution: add ruthenium nitrosonitrate, barium nitrate, cerium nitrate, and potassium nitrate into deionized water in a ratio of 3:6:2:6 in a mass ratio of ruthenium, barium, cerium, and potassium, and stir evenly. The pH of the solution was adjusted to 1 with nitric acid.

[0071] Catalyst preparation: take 10 g of the above-mentioned graph...

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
thicknessaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a ruthenium-based ammonia synthesis catalyst and its preparation method and application; the ruthenium-based ammonia synthesis catalyst includes a core-shell structure Ru-Ba-A, and the core-shell structure Ru-Ba-A includes ruthenium as a core Nanoparticles and a first shell and a second shell wrapped on the inner core in turn, the first shell is barium nanoparticles, and the second shell is metal oxide. The ruthenium-based ammonia synthesis catalyst provided by the present invention adopts the above-mentioned core-shell structure Ru-Ba-A, and surrounds the core ruthenium nanoparticles with barium nanoparticles and metal oxides from the inside to the outside in order to effectively prevent the ruthenium from being damaged during the use of the catalyst. Agglomeration of nanoparticles prevents direct contact between ruthenium nanoparticles and metal oxides, and barium nanoparticles have a promoting effect as an electronic additive, which can effectively improve the stability and catalytic activity of ruthenium-based ammonia synthesis catalysts, especially in the process of using coal to gas Stability and catalytic activity in systems for the synthesis of ammonia.

Description

technical field [0001] The invention relates to the technical field of ammonia synthesis catalyst preparation, in particular to a ruthenium-based ammonia synthesis catalyst and its preparation method and application. Background technique [0002] Ammonia is the main raw material for fertilizers and basic organic chemicals, therefore, the synthetic ammonia industry occupies an important position in the agricultural and chemical industries. The progress of ammonia synthesis industry over the years is largely due to the improvement of catalyst quality. Although ammonia synthesis catalysts account for a very small proportion in the ammonia synthesis process, ammonia synthesis catalysts directly affect the output and economic benefits of ammonia synthesis. . [0003] Ruthenium-based ammonia synthesis catalysts are considered to be the second-generation ammonia synthesis catalysts after iron catalysts, which are usually composed of three parts: carrier, active metal ruthenium and...

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 Patents(China)
IPC IPC(8): B01J23/63B01J23/58B01J35/10B01J37/02B01J37/08B01J37/16C01C1/04
CPCB01J23/63B01J23/58B01J23/002B01J37/0201B01J37/0236B01J37/088B01J37/16C01C1/0411B01J2523/00B01J35/398B01J35/618B01J35/617B01J35/40B01J35/635B01J2523/13B01J2523/25B01J2523/3712B01J2523/3706B01J2523/47B01J2523/31B01J2523/27Y02P20/52B01J21/18B01J23/462B01J37/0213B01J35/392B01J35/397B01J35/393B01J35/30B01J23/04B01J37/0203B01J37/086B01J35/23B01J35/633
Inventor 江莉龙倪军林建新何盛宝林科林炳裕林性贻
Owner FUZHOU UNIV ASSET MANAGEMENT CO LTD
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