Investigation of the chemocatalytic and biocatalytic valorization of a range of different lignin preparations: the importance of β-O-4 content

Lancefield, C. S. et al. (2016) Investigation of the chemocatalytic and biocatalytic valorization of a range of different lignin preparations: the importance of β-O-4 content. ACS Sustainable Chemistry and Engineering, 4(12), pp. 6921-6930. (doi:10.1021/acssuschemeng.6b01855)

[img]
Preview
Text
130975.pdf - Accepted Version

2MB

Abstract

A set of seven different lignin preparations was generated from a range of organosolv (acidic, alkaline, ammonia-treated, and dioxane-based), ionic liquid, autohydrolysis, and Kraft pretreatments of lignocelluloses. Each lignin was characterized by 2D HSQC NMR spectroscopy, showing significant variability in the β-O-4 content of the different lignin samples. Each lignin was then valorised using three biocatalytic methods (microbial biotransformation with Rhodococcus jostii RHA045, treatment with Pseudomonas fluorescens Dyp1B or Sphingobacterium sp. T2 manganese superoxide dismutase) and two chemocatalytic methods (catalytic hydrogenation using Pt/alumina catalyst, DDQ benzylic oxidation/Zn reduction). Highest product yields for DDQ/Zn valorization were observed from poplar ammonia percolation-organosolv lignin, which had the highest β-O-4 content of the investigated lignins and also gave the highest yield of syringaldehyde (243 mg L–1) when using R. jostii RHA045 and the most enzymatic products using P. fluorescens Dyp1B. The highest product yield from the Pt/alumina hydrogenation was observed using oak dioxasolv lignin, which also had a high β-O-4 content. In general, highest product yields for both chemocatalytic and biocatalytic valorization methods were obtained from preparations that showed highest β-O-4 content, while variable yields were obtained with preparations containing intermediate β-O-4 content, and little or no product was obtained with preparations containing low β-O-4 content.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Jackson, Professor David and Bouxin, Dr Florent
Authors: Lancefield, C. S., Rashid, G. M.M., Bouxin, F., Wasak, A., Tu, W.-C., Hallett, J., Zein, S., Rodríguez, J., Jackson, S. D., Westwood, N. J., and Bugg, T. D.H.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:ACS Sustainable Chemistry and Engineering
Publisher:American Chemical Society
ISSN:2168-0485
ISSN (Online):2168-0485
Published Online:03 October 2016
Copyright Holders:Copyright © 2016 American Chemical Society
First Published:First published in ACS Sustainable Chemistry and Engineering 4(12):6921-6930
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

University Staff: Request a correction | Enlighten Editors: Update this record