Bio-Based Valorization of Lignin-Derived Phenolic Compounds: A Review

0572612 - MBÚ 2024 RIV CH eng J - Journal Article
Martínková, Ludmila - Grulich, Michal - Pátek, Miroslav - Křístková, Barbora - Winkler, M.
Bio-Based Valorization of Lignin-Derived Phenolic Compounds: A Review.
Biomolecules. Roč. 13, č. 5 (2023), č. článku 717. E-ISSN 2218-273X
R&D Projects: GA MŠMT(CZ) LTC19037; GA ČR(CZ) GF20-23532L
EU Projects: European Commission(CZ) CA17128 - LignoCOST
Institutional support: RVO:61388971
Keywords : lignin * vanillin * guaiacol * eugenol * isoeugenol * p-coumaric acid * alkyl phenols * ferulic acid * biotransformation * valorization
OECD category: Organic chemistry
Impact factor: 5.5, year: 2022
Method of publishing: Open access
https://www.mdpi.com/2218-273X/13/5/717

Lignins are the most abundant biopolymers that consist of aromatic units. Lignins are obtained by fractionation of lignocellulose in the form of ´technical lignins´. The depolymerization (conversion) of lignin and the treatment of depolymerized lignin are challenging processes due to the complexity and resistance of lignins. Progress toward mild work-up of lignins has been discussed in numerous reviews. The next step in the valorization of lignin is the conversion of lignin-based monomers, which are limited in number, into a wider range of bulk and fine chemicals. These reactions may need chemicals, catalysts, solvents, or energy from fossil resources. This is counterintuitive to green, sustainable chemistry. Therefore, in this review, we focus on biocatalyzed reactions of lignin monomers, e.g., vanillin, vanillic acid, syringaldehyde, guaiacols, (iso)eugenol, ferulic acid, p-coumaric acid, and alkylphenols. For each monomer, its production from lignin or lignocellulose is summarized, and, mainly, its biotransformations that provide useful chemicals are discussed. The technological maturity of these processes is characterized based on, e.g., scale, volumetric productivities, or isolated yields. The biocatalyzed reactions are compared with their chemically catalyzed counterparts if the latter are available.
Permanent Link: https://hdl.handle.net/11104/0343233