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Updated: Apr 17, 2026
10:18
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
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Biomimetic Fenton-catalyzed lignin depolymerization to high-value aromatics and dicarboxylic acids
Jijiao Zeng1, Chang Geun Yoo, Fei Wang
1Department of Agricultural and Biological Engineering, University of Florida, PO Box 110570, Gainesville, FL 32611 (USA).
Chemsuschem
|February 10, 2015
Summary
Mimicking nature, Fenton catalysts (Fe(3+), H2O2) break down lignin into valuable organic oils. This efficient lignin depolymerization process yields aromatic compounds and reduces charcoal formation.
Area of Science:
- Biomass Conversion
- Catalysis
- Organic Chemistry
Background:
- Lignin, a complex aromatic biopolymer, presents challenges in biomass valorization due to its recalcitrant structure.
- Efficient lignin depolymerization is crucial for unlocking the potential of lignocellulosic feedstocks for sustainable chemical production.
Purpose of the Study:
- To investigate the efficacy of Fenton catalysts (Fe(3+), H2O2) for lignin depolymerization in supercritical ethanol.
- To characterize the resulting organic oils and analyze the lignin structure before and after treatment.
Main Methods:
- Lignin depolymerization using Fenton catalyst in supercritical ethanol (7 MPa, 250°C).
- Analysis of thermal properties (TGA), functional groups (31P NMR, XPS), and composition (Py-GC-MS).
Main Results:
- Achieved yields of organic oils up to 66.0±8.5%, comprising aromatic monomers, phenols, and dicarboxylic acids.
- Fenton treatment facilitated lignin depolymerization primarily through β-ether bond cleavage.
- Formation of a lignin-iron chelating complex inhibited lignin recondensation and minimized charcoal formation.
Conclusions:
- Fenton catalysis in supercritical ethanol is an effective method for lignin depolymerization.
- The process enhances the yield of valuable liquid products from lignin.
- Mimicking natural lignin degradation pathways offers a promising route for biomass valorization.
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