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Wood biomass-based porous carbon material prepared by high-temperature hydrothermal assisted cellulase hydrolysis, and application and method thereof

A woody biomass, porous carbon material technology

Pending Publication Date: 2021-08-13
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of wood composition and chemical structure, the high crystallinity of cellulose itself and the physical barrier formed by lignin wrapping make the effect of purely using cellulase to hydrolyze wood not good.

Method used

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  • Wood biomass-based porous carbon material prepared by high-temperature hydrothermal assisted cellulase hydrolysis, and application and method thereof
  • Wood biomass-based porous carbon material prepared by high-temperature hydrothermal assisted cellulase hydrolysis, and application and method thereof
  • Wood biomass-based porous carbon material prepared by high-temperature hydrothermal assisted cellulase hydrolysis, and application and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0069] A woody biomass-based porous carbon material prepared by high-temperature hydrothermal assisted cellulase hydrolysis, the preparation steps of which are as follows:

[0070] ⑴ Add about 100g poplar wood chips (3mm×30mm×30mm, axial×tangential×radial) air-dried to 10% moisture content, and add deionized water to the double cylinder according to the solid-liquid ratio of 1:10kg / L In the rotary cooker; the closed double-cylinder rotary cooker was heated from room temperature to 160°C, and kept at this temperature for 120min for high-temperature hydrothermal pretreatment;

[0071] (2) Cool the woody biomass raw material obtained in step (1) to 30°C, then filter it with an 80-mesh nylon sieve, and then use deionized water to fully wash the woody biomass raw material after high-temperature hydrothermal treatment until the filtrate is colorless and its pH It is neutral; after natural air drying, store it in a refrigerator at about 4°C for later use;

[0072] (3) Add the woody ...

Embodiment 2

[0083] A woody biomass-based porous carbon material prepared by high-temperature hydrothermal assisted cellulase hydrolysis, the preparation steps of which are as follows:

[0084] ⑴ Add about 100g poplar wood chips (3mm×30mm×30mm, axial×tangential×radial) air-dried to 10% moisture content, and add deionized water to the double cylinder according to the solid-liquid ratio of 1:10kg / L In the rotary cooker; the closed double-cylinder rotary cooker was heated from room temperature to 160°C, and kept at this temperature for 120min for high-temperature hydrothermal pretreatment;

[0085](2) Cool the woody biomass raw material obtained in step (1) to 30°C, then filter it with an 80-mesh nylon sieve, and then use deionized water to fully wash the woody biomass raw material after high-temperature hydrothermal treatment until the filtrate is colorless and its pH It is neutral; after natural air drying, store it in a refrigerator at about 4°C for later use;

[0086] (3) Add the woody b...

Embodiment 3

[0097] A woody biomass-based porous carbon material prepared by high-temperature hydrothermal assisted cellulase hydrolysis, the preparation steps of which are as follows:

[0098] ⑴ Add about 100g poplar wood chips (3mm×30mm×30mm, axial×tangential×radial) air-dried to 10% moisture content, and add deionized water to the double cylinder according to the solid-liquid ratio of 1:10kg / L In the rotary cooker; the closed double-cylinder rotary cooker was heated from room temperature to 160°C, and kept at this temperature for 120min for high-temperature hydrothermal pretreatment;

[0099] (2) Cool the woody biomass raw material obtained in step (1) to 30°C, then filter it with an 80-mesh nylon sieve, and then use deionized water to fully wash the woody biomass raw material after high-temperature hydrothermal treatment until the filtrate is colorless and its pH It is neutral; after natural air drying, store it in a refrigerator at about 4°C for later use;

[0100] (3) Add the woody ...

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Abstract

The invention discloses a wood biomass-based porous carbon material prepared by a high-temperature hydrothermal assisted cellulase hydrolysis method. The wood biomass-based porous carbon material is prepared by the following steps: mixing an air-dried wood biomass raw material with deionized water, and carrying out high-temperature hydrothermal pretreatment; filtering, and washing; soaking, naturally air-drying, repeating operations for many times, and refrigerating for later use; mixing the wood biomass subjected to high-temperature hydrothermal pretreatment with cellulase powder in an acetic acid-sodium acetate buffer solution, taking out, freezing, and carrying out freeze-drying treatment; and carrying out carbonization treatment, washing to be neutral, and drying to obtain the wood biomass-based porous carbon material. The preparation process is simple, an activating agent is green and environment-friendly, strong acid, strong alkali and harsh conditions are not needed, and when the wood biomass-based porous carbon material is used as a working electrode material of a supercapacitor, the wood biomass-based porous carbon material has large specific surface area and high specific capacitance.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a woody biomass-based porous carbon material prepared by high-temperature hydrothermal assisted cellulase hydrolysis, an application and a method. Background technique [0002] As a new type of energy storage device, supercapacitors have attracted extensive attention due to their advantages such as high power density, fast charging and discharging, and long cycle life. However, the energy density of supercapacitors is not high, which limits their large-scale commercial application. As the core device in supercapacitors, electrode materials determine its electrochemical performance. Currently, biomass-derived porous carbons have been widely used as electrode materials due to their high specific surface area and high porosity. Many researchers use KOH, NaOH, H 3 PO 4 Biomass-based porous carbons with rich pore sizes were prepared by activating precursors with other activators...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/342C01B32/05H01G11/26H01G11/86
CPCC01B32/324C01B32/342C01B32/05H01G11/26H01G11/86Y02E60/13
Inventor 侯庆喜蒋通宝张文文刘苇
Owner TIANJIN UNIV OF SCI & TECH