Catalytic disassembly of an organosolv lignin via hydrogen transfer from supercritical methanol

Katalin Barta; Theodore D. Matson; Makayla L. Fettig; Susannah L. Scott; Alexei V. Iretskii; Peter C. Ford

doi:10.1039/C0GC00181C

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Green Chemistry

Issue 9, 2010

The home of cutting-edge research on the development of alternative sustainable technologies.

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Catalytic disassembly of an organosolv lignin via hydrogen transfer from supercritical methanol

Katalin Barta,^a Theodore D. Matson,^a Makayla L. Fettig,^a^b Susannah L. Scott,^a^c Alexei V. Iretskii*^a^b and Peter C. Ford*^a

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Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara CA, USA
E-mail: ford@chem.ucsb.edu

Department of Chemistry and Environmental Sciences, Lake Superior State University, Sault Sainte Marie, USA
E-mail: airetski@lssu.edu

Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara CA, USA
E-mail: sscott@engineering.ucsb.edu

Green Chem., 2010,12, 1640-1647

DOI: 10.1039/C0GC00181C
Received 04 Jun 2010, Accepted 14 Jul 2010
First published online 10 Aug 2010

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A novel approach to disassembling biomass-derived lignin into processible units is described. This transformation is achieved in supercritical methanol, using a Cu-doped porous metal oxide as the catalyst, at a relatively mild temperature (300 °C). Hydrogen transfer from methanol to an organosolv lignin results in the complete hydrogenolysis of phenyl ether bonds, coupled with the hydrogenation of aromatic rings. The product is a complex mixture composed principally of monomeric substituted cyclohexyl derivatives with greatly reduced oxygen content and negligible aromatics. Notably, no char formation was observed. We also describe operational indices based on the ¹H NMR spectra that facilitate holistic evaluation of the product distribution in this and other biomass transformations.

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Katalin Barta
Theodore D. Matson
Makayla L. Fettig
Susannah L. Scott
Alexei V. Iretskii
Peter C. Ford

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Catalytic disassembly of an organosolv lignin via hydrogen transfer from supercritical methanol

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