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Production of oligosaccharides and biofuels from Miscanthus using combinatorial steam explosion and ionic liquid pretreatment.

Authors
  • Bhatia, Rakesh1
  • Lad, Jai B2
  • Bosch, Maurice3
  • Bryant, David N3
  • Leak, David4
  • Hallett, Jason P5
  • Franco, Telma T6
  • Gallagher, Joe A3
  • 1 Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Plas Gogerddan, Aberystwyth SY23 3EE, UK. Electronic address: [email protected]
  • 2 ARCITEKBio Ltd, Aberystwyth Innovation and Enterprise Campus (AIEC), Aberystwyth University, Plas Gogerddan, Aberystwyth SY23 3EE, UK.
  • 3 Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Plas Gogerddan, Aberystwyth SY23 3EE, UK.
  • 4 Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
  • 5 Department of Chemical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
  • 6 Faculty of Chemical Engineering, University of Campinas (UNICAMP), Campinas, São Paulo 13083-852, Brazil. , (Brazil)
Type
Published Article
Journal
Bioresource technology
Publication Date
Dec 28, 2020
Volume
323
Pages
124625–124625
Identifiers
DOI: 10.1016/j.biortech.2020.124625
PMID: 33418350
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Pretreatment strategies are fundamental to effectively deconstruct lignocellulosic biomass and economically produce biofuels, biomaterials and bio-based chemicals. This study evaluated individual and combinatorial steam explosion (SE) and ionic liquid (IL) pretreatments for production of high-value oligosaccharides from a novel seed-based Miscanthus hybrid (Mx2779). The two ILs used for pretreatment were triethylammonium hydrogen sulphate [TEA][HSO4] and 1-ethyl-3-methylimidazolium acetate [C2mim][OAc]. The results showed that each pretreatment leads to distinct effects on the fragmentation (cellulose and xylan dissolution, delignification, deacetylation) and physicochemical modification (cellulose and lignin properties) of lignocellulose. This, in turn, dictated enzymatic hydrolysis efficiencies of the cellulose pulp to glucose or gluco-oligosaccharides for downstream applications. Our findings suggest that the stand-alone SE or [C2mim][OAc] pretreatments may offer cost advantages over [TEA][HSO4] through the production of oligosaccharides such as xylo- and gluco-oligosaccharides. This study also highlights technical and economic pretreatment process challenges related to the production of oligosaccharides from Miscanthus Mx2779 biomass. Copyright © 2021 The Authors. Published by Elsevier Ltd.. All rights reserved.

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