Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of carbon-supported ruthenium-based ammonia synthesis catalyst and preparation method thereof

A technology of ammonia synthesis and carbon loading, applied in chemical instruments and methods, ammonia preparation/separation, physical/chemical process catalysts, etc., can solve the problem of reducing catalyst stability, affecting the ammonia synthesis performance of ruthenium catalysts, and environmental pollution of waste acid solutions and other problems, to achieve the effect of improving ammonia synthesis activity and heat resistance stability, convenient large-scale application, and good heat resistance stability

Active Publication Date: 2022-08-05
ZHEJIANG UNIV OF TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will not only produce waste acid solution and cause serious environmental pollution, but also Catal.Sci.Technol., 2015, 5, 2829-2838 reported that oxygen groups on the surface of carbon support will generate gas with carbon support under the conditions of ammonia synthesis reaction. The chemical reaction destroys the structure of the carbon support, thereby reducing the stability of the catalyst
[0005] Therefore, for the preparation of ruthenium catalysts with high ammonia synthesis performance, the influence of active components cannot be simply considered. The dispersion of additives on the carbon support and the interaction between the additives and the carbon support will also affect the ammonia synthesis of ruthenium catalysts. synthetic properties

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 carbon-supported ruthenium-based ammonia synthesis catalyst and preparation method thereof
  • A kind of carbon-supported ruthenium-based ammonia synthesis catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Dissolve 15.2 g of barium nitrate in 180 mL of deionized water as dipping solution A; then weigh 100 g of pretreated coconut shell activated carbon dried to constant weight and add it to dipping solution A. After dipping for 12 h at 25°C , dried to constant weight in a blast drying oven at 120°C;

[0029] (2) placing the dried sample in the step (1) in a tubular furnace, and heating up to 850° C. for 10min under argon atmosphere to obtain barium nitrate modified coconut shell activated carbon;

[0030] (3) get 10g of ruthenium trichloride and dissolve it in 180mL of deionized water as dipping solution B; then add the barium nitrate modified coconut shell activated carbon obtained in step (2) into dipping solution B, dipping under 25 ℃ of conditions After 12 hours, directly add 1000 mL of dilute ammonia solution with a volume concentration of 10% to soak for 12 hours, and finally use deionized water to fully wash until the filtrate is detected with silver nitrate sol...

Embodiment 2

[0032] (1) Dissolve 15.2 g of barium nitrate in 180 mL of deionized water as dipping solution A; then weigh 100 g of pretreated coconut shell activated carbon dried to constant weight and add it to dipping solution A. After dipping for 12 h at 25°C , dried to constant weight in a blast drying oven at 120°C;

[0033] (2) placing the dried sample in the step (1) in a tubular furnace, heating up to 600 DEG C and roasting for 10 min under an argon atmosphere to obtain barium nitrate modified coconut shell activated carbon;

[0034] (3) Dissolve 10 g of ruthenium trichloride in 180 mL of deionized water as dipping solution B; then add the barium nitrate modified coconut shell activated carbon obtained in step (2) into dipping solution B, and dipping at 25°C for 12 h Then, directly add 1000 mL of dilute ammonia solution with a volume concentration of 10% to soak for 12 hours, and finally use deionized water to fully wash until the filtrate is detected with silver nitrate solution wi...

Embodiment 3

[0036] (1) Dissolve 15.2 g of barium nitrate in 180 mL of deionized water as dipping solution A; then weigh 100 g of pretreated coconut shell activated carbon dried to constant weight and add it to dipping solution A. After dipping for 12 h at 25°C , dried to constant weight in a blast drying oven at 120°C;

[0037] (2) placing the dried sample in the step (1) in a tube furnace, heating up to 1000 DEG C and calcining for 10min under an argon atmosphere to obtain barium nitrate modified coconut shell activated carbon;

[0038] (3) Dissolve 10 g of ruthenium trichloride in 180 mL of deionized water as dipping solution B; then add the barium nitrate modified coconut shell activated carbon obtained in step (2) into dipping solution B, and dipping at 25°C for 12 h Then, directly add 1000 mL of dilute ammonia solution with a volume concentration of 10% to soak for 12 hours, and finally use deionized water to fully wash until the filtrate is detected with silver nitrate solution with...

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 catalysts, and specifically discloses a carbon-supported ruthenium-based ammonia synthesis catalyst and a preparation method thereof. The preparation method comprises the following steps: 1) immersing a carbon material in an aqueous solution of metal nitrate, and then drying the impregnated carbon material. Put it in a tube furnace, and heat it up to 600-1000 ℃ for 5-30 minutes under an inert atmosphere to obtain a metal nitrate modified carbon material; 2) Immerse the modified carbon material in an aqueous solution of ruthenium trichloride, and add a precipitate Then, the impregnated modified carbon material is washed and dried to obtain the carbon-supported ruthenium-based ammonia synthesis catalyst. The method of the invention is simple to operate, avoids the use of an acid solution, the ammonia synthesis rate of the catalyst is more than 50% higher than that of the traditional ruthenium catalyst, and the ammonia synthesis activity and heat resistance stability of the catalyst are greatly improved.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a carbon-supported ruthenium-based ammonia synthesis catalyst and a preparation method thereof. Background technique [0002] Ammonia synthesis is a pillar industry of the chemical industry. As one of the raw materials for fertilizers and various nitrogen-containing chemicals, it has a crucial impact on agricultural production. In addition, ammonia has the properties of carbon-free, high hydrogen content, easy storage and transportation, and can also be used as an energy carrier for hydrogen storage and conversion. Therefore, ammonia is considered to play an important role in the future economy. [0003] Ruthenium catalysts are known as the second-generation ammonia synthesis catalysts due to their excellent performance. At present, the more promising ruthenium catalysts are composed of carbon support, active metal ruthenium and auxiliary agents. The patent application documents whose p...

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): B01J23/46B01J27/25C01C1/04
CPCB01J23/462B01J27/25C01C1/0411Y02P20/52
Inventor 李瑛马永承韩文锋刘化章唐浩东
Owner ZHEJIANG UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com