Hydrothermal Liquefaction of α-O-4 Aryl Ether Linkages in Lignin.

Autor: Lui MY; Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China., Chan B; Graduate School of Engineering, Nagasaki University, Bunkyo 1-14, Nagasaki, 852-8521, Japan., Yuen AKL; Laboratory of Advanced Catalysis for Sustainability, School of Chemistry, The University of Sydney, Sydney, 2006, Australia., Masters AF; Laboratory of Advanced Catalysis for Sustainability, School of Chemistry, The University of Sydney, Sydney, 2006, Australia., Maschmeyer T; Laboratory of Advanced Catalysis for Sustainability, School of Chemistry, The University of Sydney, Sydney, 2006, Australia.
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2020 Apr 21; Vol. 13 (8), pp. 2002-2006. Date of Electronic Publication: 2020 Feb 27.
DOI: 10.1002/cssc.201903263
Abstrakt: By using lignin model compounds with relevant key characteristic structural features, the reaction pathways of α-O-4 aryl ether linkages under hydrothermal conditions are elucidated. Experimental results and computational modeling suggest that the α-O-4 linkages in lignin undergo catalyzed hydrolysis and elimination to give phenolic and alkenylbenzene derivatives as major products in subcritical water. The decreased relative permittivity of water at these high temperatures and pressures facilitates the elimination reactions. The alkyl group on the α-carbon and the methoxy groups on the phenyl rings both have positive effects on the rate of conversion of α-O-4 linkages in native lignin.
(© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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