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

A kind of highly active catalyst for ammonia synthesis and preparation method thereof

A high-activity catalyst, a technology for ammonia synthesis, applied in the preparation/separation of ammonia, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve problems such as affecting the catalytic effect of active metals, achieve good industrial application prospects, good ammonia Effects of synthetic properties

Active Publication Date: 2021-09-24
FUZHOU UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the preparation process of the existing ruthenium-cobalt bimetallic catalysts, two active metal precursors are usually mixed and added to the support, and the difference in the interaction between the two metals and the support will affect the catalytic effect of the active metal.

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 highly active catalyst for ammonia synthesis and preparation method thereof
  • A kind of highly active catalyst for ammonia synthesis and preparation method thereof
  • A kind of highly active catalyst for ammonia synthesis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 2.538 g of cerium acetate and 23 mg of cobalt nitrate mixed and dissolved in 20 mL of deionized water to form a mixed solution, take 38.4 g of NaOH dissolved in 140 mL of distilled water to form an alkaline solution; then mix and stir the two solutions for 1 hour, at 160 After hydrothermal reaction at ℃ for 6 hours, a solid solution was obtained; the solid solution was washed to neutrality, dried at 100 ℃ overnight, and calcined at 400 ℃ for 1 hour, and the obtained sample was impregnated with 10 g / L carbonyl ruthenium alcohol solution 3 hours; then in H2 volume concentration of 10% 2 -Ar mixed gas, after reduction at 600 °C for 4 hours, the catalyst 1RuCo 0.1 / Ce, calculated based on the mass of cerium oxide, the addition amounts of ruthenium metal and cobalt metal in the catalyst are 1% and 0.1%, respectively.

Embodiment 2

[0026] Take 1.736 g of cerium nitrate and 2.6 mg of cobalt chloride and mix and dissolve in 30 mL of deionized water to form a mixed solution, and dissolve 20 g of KOH in 60 mL of distilled water to form an alkaline solution; then mix and stir the two solutions for 0.5 hours, and then A solid solution was obtained after a hydrothermal reaction at 100 °C for 24 hours; the solid solution was washed to neutrality, dried at 80 °C for 2 hours, and calcined at 550 °C for 2 hours, and the obtained sample was treated with 15 g / L nitrosyl nitrate Ruthenium alcohol solution was soaked for 2 hours; then the catalyst 0.5RuCo was obtained after reduction with pure hydrogen at 500 °C for 2 hours 0.15 / Ce, based on the mass of cerium oxide, the addition amounts of ruthenium metal and cobalt metal in the catalyst are 0.5% and 0.15%, respectively.

Embodiment 3

[0028] Mix and dissolve 3.472 g cerium nitrate and 2.3 mg cobalt nitrate in 40 mL deionized water to form a mixed solution, and dissolve 38.4 g NaOH in 140 mL distilled water to form an alkaline solution; The solid solution was obtained after hydrothermal reaction for 24 hours; the solid solution was washed to neutrality, dried at 80 °C for 2 hours, and calcined at 550 °C for 2 hours, and the obtained sample was impregnated with 5 g / L ruthenium chloride alcohol solution 2 hours; then in 10%H 2 -3.3%N 2 Catalyst 0.5RuCo 0.05 / Ce, based on the mass of cerium oxide, the addition amounts of ruthenium metal and cobalt metal in the catalyst are 0.5% and 0.05%, respectively.

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 discloses a high-activity catalyst for ammonia synthesis and a preparation method thereof. It first grows cobalt on a cerium oxide carrier in situ, and then introduces ruthenium, thereby taking ruthenium and cobalt double metals as active components. The high-activity catalyst for ammonia synthesis is specifically obtained by mixing and dissolving cerium precursor and cobalt precursor in water, mixing and stirring with alkaline solution evenly, obtaining a solid solution through hydrothermal reaction, and then washing, drying, After calcination, the obtained sample is impregnated with a ruthenium precursor solution, and finally obtained by reduction. The catalyst obtained by the invention has higher ammonia synthesis activity and better application prospect.

Description

technical field [0001] The invention belongs to the technical field of ammonia synthesis catalysts, and in particular relates to a highly active catalyst for ammonia synthesis and a preparation method thereof. Background technique [0002] Ammonia is an important chemical intermediate in the production of agricultural fertilizers, plastics, pharmaceuticals, explosives and other chemicals. Ammonia is an almost ideal hydrogen storage material due to its appreciable hydrogen capacity of 17.6 wt% and its easy condensation into a liquid state for storage or transportation. At the same time, 4.3 kWh h –1 The high energy density and zero carbon emissions make ammonia an ideal energy carrier and even a substitute for hydrogen in the future energy economy. Therefore, the importance of ammonia in the field of new energy has become increasingly significant, and the development of ammonia synthesis methods that are beneficial to the environment has attracted widespread attention. [...

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): B01J23/89C01C1/04
CPCB01J23/8913C01C1/0411Y02P20/52
Inventor 林炳裕李春艳江莉龙林建新倪军
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