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Issue 8, 2016
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Mechanistic investigation of the Zn/Pd/C catalyzed cleavage and hydrodeoxygenation of lignin

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Abstract

While current biorefinery processes use lignin only for its heat value, the conversion of lignin to high value chemicals is an area of increasing interest. Herein we present a detailed mechanistic study of the hydrodeoxygenation (HDO) of lignin by using a synergistic Pd/C and ZnII catalyst through use of both lignin model compounds and lignocellulosic biomass. Spectroscopic data coupled with the study of lignin model compounds suggest that ZnII activates and facilitates removal of the hydroxyl group at the Cγ position of the β-O-4 ether linkage. Activation is proposed to occur through formation of a six-membered ring complex of ZnII coordinated to the oxygen atoms at Cα and Cγ of the lignin model compound guaiacylglycerol-β-guaiacyl.

Graphical abstract: Mechanistic investigation of the Zn/Pd/C catalyzed cleavage and hydrodeoxygenation of lignin

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Supplementary files

Article information


Submitted
15 Jun 2015
Accepted
02 Feb 2016
First published
02 Feb 2016

Green Chem., 2016,18, 2399-2405
Article type
Paper
Author version available

Mechanistic investigation of the Zn/Pd/C catalyzed cleavage and hydrodeoxygenation of lignin

I. Klein, C. Marcum, H. Kenttämaa and M. M. Abu-Omar, Green Chem., 2016, 18, 2399
DOI: 10.1039/C5GC01325A

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