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Updated: Jun 30, 2025

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Published on: January 7, 2019

Interaction between lignin and cellulose during the pyrolysis process.

Jiawei Zhu¹, Chungui Du¹

¹Bamboo Industry Institute, Zhejiang Agriculture and Forestry University, Hangzhou 311300, PR China; College of Chemistry and Materials Engineering, Zhejiang Agriculture and Forestry University, Hangzhou 311300, PR China.

International Journal of Biological Macromolecules

|March 23, 2024

Summary

This summary is machine-generated.

Lignin hinders cellulose pyrolysis in windmill palm fibers. Delignification significantly lowers cellulose pyrolysis temperatures, revealing strong lignin-cellulose interactions crucial for understanding biomass decomposition.

Keywords:

Cellulose Lignin Pyrolysis characteristics Pyrolysis kinetics Windmill palm

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Area of Science:

Biomass Pyrolysis
Biomass Component Interactions
Cell Wall Ultrastructure

Background:

Biomass pyrolysis is influenced by cell wall structure and component interactions.
Understanding these interactions is key to optimizing biomass conversion.
Windmill palm (Trachycarpus fortunei) culm and silk present distinct structural characteristics.

Purpose of the Study:

To investigate the pyrolysis characteristics of windmill palm culm and silk after delignification.
To elucidate the role of lignin in cellulose pyrolysis.
To analyze the interaction between lignin and cellulose during thermal decomposition.

Main Methods:

Thermogravimetric analysis (TGA) for pyrolysis behavior.
Pyrolysis kinetics analysis to determine reaction parameters.
Comparative analysis of delignified and undelignified samples.

Main Results:

Cellulose pyrolysis temperature of silk is higher than culm due to higher lignin content.
Delignification decreased silk cellulose pyrolysis temperature by 48°C (vs. 18°C for culm), indicating strong lignin-cellulose interaction.
Frequency factor increased significantly after delignification, with silk showing a larger increase (129%) than culm (26%), linked to lignin's carbon layer formation.

Conclusions:

Lignin plays a significant hindering role in cellulose pyrolysis.
A mechanism model for lignin hindering cellulose pyrolysis is proposed.
This research provides insights into biomass component interactions within complex cell walls.