What does this research mean for the field?

Ozone oxidation under mild, catalyst- and base-free conditions enables rapid depolymerization of lignin into value-added aromatics, with conversion efficiency and product selectivity strongly dependent on the structural features of the lignin source. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To achieve rapid and sustainable lignin depolymerization under mild, catalyst-free, and base-free conditions using ozone as a clean oxidant, while evaluating how native structural features influence reaction pathways.

September 8, 2026ChemSusChem

Base‐Free Ozonation of Lignin for Rapid Production of Value‐Added Aromatics: Structural Factors and Mechanistic Insights

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Authors

YZYun ZhaoJiangnan University TLTingfei LiShanghai Institute of Technology YCYang CaoNanjing Agricultural University

Discussion

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Overview

Experimental study demonstrates rapid base-free ozonation of lignin into valuable aromatic monomers, highlighting how structural features dictate yield and selectivity.

Key Points

To achieve rapid and sustainable lignin depolymerization under mild, catalyst-free, and base-free conditions using ozone as a clean oxidant, while evaluating how native structural features influence reaction pathways.
Depolymerized grass, softwood, and hardwood lignins via ozonation using ethanol as both solvent and coreactant at 0 °C without metal catalysts or bases.
Conducted kinetic analyses, Van Krevelen diagram mapping, and Pearson correlation analysis to evaluate the effects of linkage types, unit composition, and molecular weight on monomer yields and selectivity.
Grass lignin reached 91.55% conversion with a 15.41% monomer yield and 18.43% carbon efficiency within 3 min at 0 °C.
Softwood lignin yielded 2.40% monomers with over 90% selectivity toward vanillin, while hardwood lignin yielded predominantly S-type monomers including syringaldehyde at 53.17% selectivity.
Kinetic analyses revealed that p-hydroxyphenyl monomers exhibit greater oxidative stability compared to guaiacyl and syringyl units during base-free ozonation.

Cite This Study

Zhao et al. (2026) studied this question.

synapsesocial.com/papers/6a9fd7e758e84d0ff5b47084 https://doi.org/10.1002/cssc.71044

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September 8, 2026ChemSusChem

Base‐Free Ozonation of Lignin for Rapid Production of Value‐Added Aromatics: Structural Factors and Mechanistic Insights

View Full Paper

Ask AI

Bookmark

Authors

YZYun ZhaoJiangnan University TLTingfei LiShanghai Institute of Technology YCYang CaoNanjing Agricultural University

Discussion

Member takes

Overview

Experimental study demonstrates rapid base-free ozonation of lignin into valuable aromatic monomers, highlighting how structural features dictate yield and selectivity.

Key Points

To achieve rapid and sustainable lignin depolymerization under mild, catalyst-free, and base-free conditions using ozone as a clean oxidant, while evaluating how native structural features influence reaction pathways.
Depolymerized grass, softwood, and hardwood lignins via ozonation using ethanol as both solvent and coreactant at 0 °C without metal catalysts or bases.
Conducted kinetic analyses, Van Krevelen diagram mapping, and Pearson correlation analysis to evaluate the effects of linkage types, unit composition, and molecular weight on monomer yields and selectivity.
Grass lignin reached 91.55% conversion with a 15.41% monomer yield and 18.43% carbon efficiency within 3 min at 0 °C.
Softwood lignin yielded 2.40% monomers with over 90% selectivity toward vanillin, while hardwood lignin yielded predominantly S-type monomers including syringaldehyde at 53.17% selectivity.
Kinetic analyses revealed that p-hydroxyphenyl monomers exhibit greater oxidative stability compared to guaiacyl and syringyl units during base-free ozonation.

Cite This Study

Zhao et al. (2026) studied this question.

synapsesocial.com/papers/6a9fd7e758e84d0ff5b47084 https://doi.org/10.1002/cssc.71044

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