Hydrogen-Transfer Reductive Catalytic Fractionation of Lignocellulose: High Monomeric Yield with Switchable Selectivity.
Angew Chem Int Ed Engl
; 62(32): e202307116, 2023 Aug 07.
Article
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| ID: mdl-37296524
ABSTRACT
Lignin solubilization and in situ hydrogenolysis are crucial for reductive catalytic fractionation (RCF) of lignocellulose to aromatic monomers. In this study, we reported a typical hydrogen bond acceptor of choline chloride (ChCl) to tailor the hydrogen-donating environment of the Ru/C-catalyzed hydrogen-transfer RCF of lignocellulose. The ChCl-tailored hydrogen-transfer RCF of lignocellulose was conducted under mild temperature and low-pressure (<1â
bar) conditions, which was applicable to other lignocellulosic biomass sources. We obtained an approximate theoretical yield of propylphenol monomer of 59.2â
wt % and selectivity of 97.3 % using an optimal content of ChCl (10â
wt %) in ethylene glycol at 190 °C for 8â
h. When the content of ChCl in ethylene glycol was increased to 110â
wt %, the selectivity of propylphenol switched toward propylenephenol (yield of 36.2â
wt % and selectivity of 87.6 %). The findings in this work provide valuable information for transforming lignin from lignocellulose into value-added products.
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Angew Chem Int Ed Engl
Año:
2023
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Article