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

Carbon-based solid acid catalyst, preparation method and method for applying carbon-based solid acid catalyst to biomass hydrothermal conversion

A carbon-based solid acid and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of restricting large-scale industrial applications, easy loss of catalysts, expensive raw materials, etc.

Active Publication Date: 2021-04-30
ZHEJIANG UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal catalysts, especially noble metal catalysts, are expensive in raw materials and high in preparation costs, which limit their large-scale industrial application
In addition, the impurities and solid by-products of the reaction raw materials are easy to adhere to the surface of the catalyst, causing the catalyst to be easily deactivated, and the finer powder catalyst is easily lost during the recovery process, resulting in a decrease in the cycle performance of the catalyst. Load, its number of active centers is limited, so its activity is limited

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
  • Carbon-based solid acid catalyst, preparation method and method for applying carbon-based solid acid catalyst to biomass hydrothermal conversion
  • Carbon-based solid acid catalyst, preparation method and method for applying carbon-based solid acid catalyst to biomass hydrothermal conversion
  • Carbon-based solid acid catalyst, preparation method and method for applying carbon-based solid acid catalyst to biomass hydrothermal conversion

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0050] The present invention proposes a preparation method of a carbon-based solid acid catalyst, which uses pectin as a carbon-based precursor, mixes pectin and an ionic resin of an aromatic ring matrix in a medium and then dries it, then pyrolyzes the dried product, and uses Concentrated sulfuric acid is subjected to sulfonation treatment to obtain a carbon-based solid acid catalyst. Include the following steps:

[0051] S1. mix pectin with water, then add sulfuric acid to activate, and then add the mixture to the ion resin of the aromatic ring matrix;

[0052] S2. drying the obtained product in step S1, pulverizing the obtained material into powder, and pyrolyzing it under dry inert gas;

[0053] S3. Sulfonating the solid obtained after pyrolysis in step S2 with concentrated sulfuric acid;

[0054] S4. Dilute the obtained product of step S3 with water and filter, and the filter residue after filtration is washed with water until no sulfate ion is detected in the washing w...

Embodiment 1

[0071] 8g of dried orange peel pectin was mixed with 30ml of deionized water, then 1ml of concentrated sulfuric acid (98%) was added, and then the mixture was slowly added to the pre-dried 8g of Amberlyst 15 ion resin. After drying at 110–120 °C for 48 h, the resulting black substance was pyrolyzed in a horizontal tube furnace for 1 h at 300 °C under dry nitrogen. With concentrated sulfuric acid (1 g solid / 5g H 2 SO 4 ) at 80°C for 24 h of sulfonation treatment, and the heating equipment is an oil bath with magnetic stirring. After diluting with a large amount of deionized water, the obtained black matter was collected by filtration and washed several times with deionized water until sulfate ions were no longer detected in the washing water. The resulting black solid was dried in an oven at 80°C for 24 hours. Take 0.05g of the obtained black solid in a 10ml test tube, add 0.1g of xylose and 5ml of γ-valerolactone, react under microwave heating conditions for 1h, and at a re...

Embodiment 2

[0078] 8g of dried orange peel pectin was mixed with 30ml of deionized water, then 1ml of concentrated sulfuric acid (98%) was added, and then the mixture was slowly added to the pre-dried 8g of Amberlyst 15 ion resin. After drying at 110–120 °C for 48 h, the resulting black substance was pyrolyzed in a horizontal tube furnace for 1 h at 300 °C under dry nitrogen. With concentrated sulfuric acid (1 g solid / 5g H 2 SO 4 ) was subjected to sulfonation treatment at 100°C for 24 h, and the heating equipment was an oil bath with magnetic stirring. After diluting with a large amount of deionized water, the obtained black matter was collected by filtration and washed several times with deionized water until sulfate ions were no longer detected in the washing water. The resulting black solid was dried in an oven at 80°C for 24 hours. Take 0.05 g of the obtained black solid in a 10 ml test tube, add 0.1 g of xylose and 5 ml of γ-valerolactone, and react under microwave heating condit...

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 provides a carbon-based solid acid catalyst, a preparation method thereof and a method for applying the carbon-based solid acid catalyst to biomass hydrothermal conversion. The preparation method of the carbon-based solid acid catalyst comprises the following steps: mixing pectin with water, adding concentrated sulfuric acid for activation, and then adding the mixture into ionic resin of an aromatic ring matrix; drying the obtained substance, crushing the obtained substance into powder, and pyrolyzing the powder under dry inert gas; carrying out sulfonation treatment on a solid obtained after pyrolysis by using concentrated sulfuric acid; diluting the obtained substance with water, filtering, and washing the filtered filter residue with water until sulfate ions are not detected in the washing water; and drying the solid obtained by filtering. The prepared catalyst has clear particles, is not easy to lose, and is convenient to recover. Besides, the prepared catalyst can realize hydrothermal conversion of pentose and hexose at the same time so that the purpose of preparing a high-value platform compound is achieved.

Description

technical field [0001] The invention relates to the technical field of preparation of green energy-saving chemical materials, and mainly relates to the preparation of carbon-based solid acid catalysts by using the abundant free radicals of pectin, and the preparation of carbon-based solid acid catalysts with common pectin as a precursor, and the addition of ionic resins with aromatic ring substrates to strengthen the catalyst effect. The prepared catalyst can be effectively applied to common biomass hydrothermal depolymerization catalytic reactions to achieve the purpose of efficiently producing valuable platform compounds. Background technique [0002] Facing the problems of worldwide energy shortage and environmental pollution, human beings have gradually strengthened their awareness of environmental protection and energy conservation. Therefore, the pollution problem in the chemical industry has received more and more attention. In response to the country's environmental ...

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): B01J27/02B01J31/10B01J37/08C07D307/50C07D307/46
CPCB01J27/02B01J31/10B01J37/084C07D307/50C07D307/46C07D307/36B01J27/20B01J37/20B01J21/18Y02P20/584B01J35/30B01J37/0036B01J37/009B01J37/04B01J37/06
Inventor 王树荣熊珊珊徐昊朱玲君李允超
Owner ZHEJIANG 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