Article (Scientific journals)
Lignin transformations for high value applications: towards targeted modifications using green chemistry
Gillet, Sébastien; Aguedo, Mario; Petitjean, Laurène et al.
2017In Green Chemistry, 19, p. 4200-4233
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Abstract :
[en] Lignin represents a considerable source of renewable and bio-based carbon. Pulping processes enable lignin, together with all components of the lignocellulosic biomass, to enter valorizable streams. A current key objective is to further valorize this versatile aromatic biopolymer, and for that, to go beyond its mere energy use. Despite the emergence of numerous proposals for value-added products coming from lignin, most of them remain at the research stage. The main challenges arise from the complexity and heterogeneity of the lignin structure and resulting molecular properties, the variability of the biomass source, pre-treatment processes, and the growing environment. Keeping in mind that future integrated biorefineries must take into account environmental concerns, lignin processing in accordance with green chemistry principles should first be favoured. From this very perspective, this work proposes to review the most promising current routes towards fractionation and/or depolymerization of lignin. Those should represent sustainable treatment technologies potentially leading to a broad spectrum of marketable ligninbased molecules and products. First, lignin fractionation by selective precipitation using pH as well as green solvents, or by using membrane technologies, will be addressed. Then lignin depolymerization will be discussed at length, notably from a catalytic point of view and by hydrogenolysis; the knowledge about the fundamental chemistry stemming from the use of model compounds will be described. Substitution of organic solvents with environmentally harmless supercritical fluids or with negligible vapour pressure ionic liquids is of great interest to modify lignin, and is finally reviewed. Lastly, challenges for integrated biorefineries and for launching new lignin-based compounds and products will be discussed.
Disciplines :
Chemistry
Author, co-author :
Gillet, Sébastien ;  Université de Liège - ULiège > Form. doct. sc. agro. & ingé. biol.
Aguedo, Mario ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > SMARTECH
Petitjean, Laurène;  University of Yale, New Haven, CT, USA > School of Forestry and Environmental Studies
Morais, Ana Rita;  Faculty of Science and Technology, Universidade NOVA de Lisboa, Lisbon, Portugal > LAQV-REQUIMTE, Department of Chemistry
da Costa Lopes, André;  Faculty of Science and Technology, Universidade NOVA de Lisboa, Lisbon, Portugal > LAQV-REQUIMTE, Department of Chemistry
Łukasik, Rafal;  National Laboratory of Energy and Geology (LNEG), Lisbon, Portugal > Unit of Bioenergy
Anastas, Paul;  Yale University, New Haven, CT, USA > School of Forestry and Environmental Studies
Language :
English
Title :
Lignin transformations for high value applications: towards targeted modifications using green chemistry
Publication date :
July 2017
Journal title :
Green Chemistry
ISSN :
1463-9262
eISSN :
1463-9270
Publisher :
Royal Society of Chemistry, United Kingdom
Volume :
19
Pages :
4200-4233
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 December 2018

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