Journal
CHEMSUSCHEM
Volume 13, Issue 17, Pages 4296-4317Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202001213
Keywords
Lignin; phenolic monomers; reductive catalytic fractionation; stabilization; valorization
Funding
- National Natural Science Foundation of China [21536007]
- 111 project [B17030]
- Industrial Biotechnology Catalyst (Innovate UK, BBSRC, EPSRC) [EP/N013522/1]
- Doctoral Graduate Student's Academic Visit Project of Sichuan University
- EPSRC [EP/N013522/1] Funding Source: UKRI
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The efficient valorization of lignin could dictate the success of the 2(nd)generation biorefinery. Lignin, accounting for on average a third of the lignocellulosic biomass, is the most promising candidate for sustainable production of value-added phenolics. However, the structural alteration induced during lignin isolation is often depleting its potential for value-added chemicals. Recently, catalytic reductive depolymerization of lignin has appeared to be a promising and effective method for its valorization to obtain phenolic monomers. The present study systematically summarizes the far-reaching and state-of-the-art lignin valorization strategies during different stages, including conventional catalytic depolymerization of technical lignin, emerging reductive catalytic fractionation of protolignin, stabilization strategies to inhibit the undesired condensation reactions, and further catalytic upgrading of lignin-derived monomers. Finally, the potential challenges for the future researches on the efficient valorization of lignin and possible solutions are proposed.
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