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Polymers 2017, 9(6), 240;

Catalytic Oxidation of Lignin in Solvent Systems for Production of Renewable Chemicals: A Review

Key Lab of Thermal Energy Conversion and Control of MoE, Southeast University, Nanjing 210096, China
Jiangsu Frontier Electric Power Technology Co., Ltd., Nanjing 211102, China
Department of Chemical and Process Engineering, Faculty of Engineering and Physical Sciences, University of Surrey, Surrey GU2 7XH, UK
Department of Mechanical Engineering, University College London, London WC1E 7JE, UK
Author to whom correspondence should be addressed.
Academic Editor: Wolfgang Gindl-Altmutter
Received: 5 May 2017 / Revised: 12 June 2017 / Accepted: 16 June 2017 / Published: 21 June 2017
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Lignin as the most abundant source of aromatic chemicals in nature has attracted a great deal of attention in both academia and industry. Solvolysis is one of the promising methods to convert lignin to a number of petroleum-based aromatic chemicals. The process involving the depolymerization of the lignin macromolecule and repolymerization of fragments is complicated influenced by heating methods, reaction conditions, presence of a catalyst and solvent systems. Recently, numerous investigations attempted unveiling the inherent mechanism of this process in order to promote the production of valuable aromatics. Oxidative solvolysis of lignin can produce a number of the functionalized monomeric or oligomeric chemicals. A number of research groups should be greatly appreciated with regard to their contributions on the following two concerns: (1) the cracking mechanism of inter-unit linkages during the oxidative solvolysis of lignin; and (2) the development of novel catalysts for oxidative solvolysis of lignin and their performance. Investigations on lignin oxidative solvolysis are extensively overviewed in this work, concerning the above issues and the way-forward for lignin refinery. View Full-Text
Keywords: biomass; lignin depolymerization; oxidative solvolysis; catalysis biomass; lignin depolymerization; oxidative solvolysis; catalysis

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Cheng, C.; Wang, J.; Shen, D.; Xue, J.; Guan, S.; Gu, S.; Luo, K.H. Catalytic Oxidation of Lignin in Solvent Systems for Production of Renewable Chemicals: A Review. Polymers 2017, 9, 240.

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