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

A kind of lignin-based nano-flower porous carbon carrier-loaded Ru-based catalyst and its preparation method and application in lignin depolymerization

A lignin-based, carrier-loaded technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of easy loss of active components and easy repolymerization of products etc. to achieve excellent activity, facilitate desorption, and easy control

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings and deficiencies of the catalyst prepared by using activated carbon as the carrier in the lignin degradation process above, the active components are easy to lose and the product is easy to repolymerize, and the surface morphology, pore size and metal activity of the catalyst carrier are better regulated. Dispersion of components, the primary purpose of the present invention is to provide a preparation method of lignin-based nano flower porous carbon carrier loaded Ru-based catalyst

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 lignin-based nano-flower porous carbon carrier-loaded Ru-based catalyst and its preparation method and application in lignin depolymerization
  • A kind of lignin-based nano-flower porous carbon carrier-loaded Ru-based catalyst and its preparation method and application in lignin depolymerization
  • A kind of lignin-based nano-flower porous carbon carrier-loaded Ru-based catalyst and its preparation method and application in lignin depolymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Weigh 1 part by mass of alkali lignin, weigh 0.5 part by mass of magnesium oxide and add it to 20 parts by volume of water, and continue stirring at a speed of 300-500 rpm for 1 hour to form a uniform gray-yellow mixture.

[0055] (2) Transfer the mixture into a microwave reactor, raise the temperature to 200° C. for 5 minutes at a rate of 10° C. / min, and react for 5 minutes to obtain a light yellow mixture.

[0056] (3) Put the light yellow mixture into a freeze dryer at -50°C and dry for 24 hours to obtain a composite of lignin and magnesium oxide.

[0057] (4) transfer the compound obtained into the tube furnace, under N 2 Under the atmosphere of 3°C / min, the temperature was raised to 400°C at a constant temperature of 1h to obtain a black solid. After the calcined product was ground, it was mixed with 200 volume parts (2mol / L) of HCl, stirred at a speed of 400rpm for 12h, and statically After standing for 24 hours, filter, wash with water until neutral, and dry...

Embodiment 2

[0062] (1) Weigh 1 part by mass of enzymatic lignin, weigh 5 parts by mass of magnesium oxide and add it to 30 parts by volume of water, and continue stirring for 1 hour at a speed of 300-500 rpm to form a uniform gray-yellow mixture.

[0063] (2) Transfer the mixture into a microwave reactor, raise the temperature to 100° C. for 10 minutes at a rate of 60° C. / min, and react for 10 minutes to obtain a light yellow mixture.

[0064] (3) Put the light yellow mixture into a freeze dryer at -50°C and dry for 24 hours to obtain a composite of lignin and magnesium oxide.

[0065] (4) transfer the compound obtained into the tube furnace, under N 2 Under an atmosphere of 15°C / min, the temperature was raised to 800°C at a constant temperature of 6h to obtain a black solid. After the calcined product was ground, it was mixed with 200 parts by volume (2mol / L) of HCl, stirred at a speed of 400rpm for 12h, and statically After standing for 24 hours, filter, wash with water until neutral, ...

Embodiment 3

[0070] (1) Weigh 1 part by mass of the organic solvent lignin, add 1 part by mass of magnesium oxide into 30 parts by volume of water, and continue stirring for 1 hour at a speed of 300-500 rpm to form a uniform gray-yellow mixture.

[0071] (2) Transfer the mixture into a microwave reactor, raise the temperature to 50° C. for 30 minutes at a rate of 20° C. / min, and react for 30 minutes to obtain a light yellow mixture.

[0072] (3) Put the light yellow mixture into a freeze dryer at -50°C and dry for 24 hours to obtain a composite of lignin and magnesium oxide.

[0073] (4) transfer the compound obtained into the tube furnace, under N 2 Under an atmosphere of 10°C / min, the temperature was raised to 600°C at a constant temperature of 1h to obtain a black solid, and the calcined product was ground and mixed with 200 volume parts (2mol / L) of HCl, stirred at a speed of 400rpm for 12h, and statically After standing for 24 hours, filter, wash with water until neutral, and dry at 5...

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
concentrationaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of metal solid catalysts, and discloses a lignin-based nanoflower porous carbon carrier-supported Ru-based catalyst as well as a preparation method thereofand an application of the catalyst in lignin depolymerization. The preparation method comprises the following steps: lignin is used as a carbon source, magnesium oxide is used as a template agent, and a mixed solution system containing the lignin and the magnesium oxide is treated by utilizing microwaves to obtain a lignin and magnesium oxide precursor complex; and high-temperature calcination isperformed to obtain a lignin-based nanoflower porous carbon carrier, and an active component Ru is supported by using an impregnation method to prepare the lignin-based nanoflower porous carbon carrier-supported Ru-based catalyst. The obtained catalyst provided by the invention has a structure which is composed of a large number of irregular pleated nanoflowers and has developed pore channels andthe characteristics of smaller supported ruthenium nanoparticles (1.5-6 nm), a large specific surface area (5-180 m<2> / g), high dispersity and high stability, can be applied to the lignin depolymerization and exhibit excellent activity, and has a monophenol yield of 26.8% and good cycle stability.

Description

technical field [0001] The invention belongs to the technical field of metal solid catalysts, and in particular relates to a lignin-based nanoflower porous carbon carrier loaded Ru-based catalyst, a preparation method thereof and an application in lignin depolymerization. Background technique [0002] With the massive exploitation of fossil energy, a series of energy crisis, ecological crisis and environmental pollution problems have been caused. From the perspective of energy utilization, lignocellulose, which is composed of lignin, cellulose and hemicellulose, has the greatest utilization potential. good substitute. Cellulose and hemicellulose have relatively simple structures and can be converted into small molecular compounds such as ethanol, ethylene glycol and furfural or converted into high-value fuels such as gasoline, diesel and aviation fuel through chemical or biological methods. Due to the complexity and stability of lignin's structure, it is difficult to effec...

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): B01J23/46B01J35/02B01J35/10C07C41/01C07C43/23
CPCB01J23/462B01J35/10B01J35/1009B01J35/1014B01J35/1019C07C41/01C07C43/23
Inventor 欧阳新平李天津邱学青杨东杰陈博
Owner SOUTH CHINA UNIV OF TECH
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