Catalytic depolymerisation of isolated lignin to fine chemicals: depolymerisation of Kraft lignin

de Albuquerque Fragoso, D. M., Bouxin, F. P., Montgomery, J. R.D., Westwood, N. and Jackson, S. D. (2020) Catalytic depolymerisation of isolated lignin to fine chemicals: depolymerisation of Kraft lignin. Bioresource Technology Reports, 9, 100400. (doi: 10.1016/j.biteb.2020.100400)

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Abstract

Kraft lignin depolymerisation over Pt/alumina, Rh/alumina and solvolysis was studied under a range of solvent solutions (ethanol/water, isopropanol/water, acetone/water 25:75, 50:50, 75:25 v/v), high temperature (573 K) and pressure (20 barg). The reactions generated mainly non-alkylated phenolic monomers, especially 2-methoxyphenol. In terms of overall yield, solvolysis was shown to be as effective as the catalysed reactions in some experiments. Nevertheless, it was found that for individual molecules a suitable combination of solvent mixture and catalyst resulted in the possibility of target compound generation. To contribute to an understanding of the mechanism of Kraft lignin depolymerisation, kinetic isotopic effects (KIE) were evaluated using fully deuterated and partially deuterated experiments. This revealed hydrogen exchange between the molecules and solvents. In addition, a variety of positive and inverse KIE showed the complexity of lignin depolymerisation and the direct involvement of solvents in those reactions.

Item Type:Articles
Additional Information:This work was supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico – Cnpq, Programa — Ciência sem Fronteiras – Doutorado Pleno no Exterior (GDE), Processo n° 233831/2014-2 (DMAF) and by an EPSRC Ph.D. studentship EP/1654168(JRDM).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Bouxin, Dr Florent and Jackson, Professor David and De Albuquerque Fragoso, Danielle Munick
Creator Roles:
de Albuquerque Fragoso, D. M.Funding acquisition, Validation, Formal analysis, Investigation, Writing – original draft, Writing – review and editing
Bouxin, F. P.Investigation, Formal analysis, Writing – original draft
Jackson, S. D.Supervision, Project administration, Writing – review and editing
Authors: de Albuquerque Fragoso, D. M., Bouxin, F. P., Montgomery, J. R.D., Westwood, N., and Jackson, S. D.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Bioresource Technology Reports
Publisher:Elsevier
ISSN:2589-014X
ISSN (Online):2589-014X
Published Online:08 February 2020
Copyright Holders:Copyright © 2020 Elsevier Ltd.
First Published:First published in Bioresource Technology Reports 9: 100400
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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