Single-step conversion of lignin monomers to phenol: Bridging the gap between lignin and high-value chemicals

Zhang, Jiaguang and Lombardo, Loris and Gözaydın, Gökalp and Dyson, Paul J. and Yan, Ning (2018) Single-step conversion of lignin monomers to phenol: Bridging the gap between lignin and high-value chemicals. Chinese Journal of Catalysis, 39 (9). pp. 1445-1452. ISSN 1872-2067

Full content URL: http://doi.org/10.1016/S1872-2067(18)63132-8

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Single-step conversion of lignin monomers to phenol: Bridging the gap between lignin and high-value chemicals

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Abstract

Transformation of lignin into high-value chemicals is hampered by the complexity of monomers obtained from lignin depolymerization. Here we report a strategy, composed of hydro-demethoxylation and de-alkylation reactions, that is able to chemically converge various lignin-derived phenolic monomers into phenol in a single-step. Using 2-methoxy-4-propylphenol as a model compound, Pt/C exhibited the best performance in hydro-demethoxylation reaction affording >80% 4-propylphenol from 2-methoxy-4-propylphenol, while H-ZSM-5 was identified as the most suitable catalyst for de-alkylation, achieving 83% yield of phenol from 4-propylphenol. Since the two catalysts operate under compatible conditions, combining the two catalysts to simultaneously promote both hydro-demethoxylation and de-alkylation reactions was achieved. Configuration of how to organize the catalysts is a critical parameter, where the physical mixture of the two was most effective, providing over 60% phenol from 2-methoxy-4-propylphenol in a single-step.

Keywords:lignin, phenol, zeolite, de-alkylation, hydro-demethoxylation
Subjects:F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
ID Code:34224
Deposited On:07 Jan 2019 12:26

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