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  4. Lignin Hydrogenolysis: Phenolic Monomers from Lignin and Associated Phenolates across Plant Clades
 
research article

Lignin Hydrogenolysis: Phenolic Monomers from Lignin and Associated Phenolates across Plant Clades

Chen, Mingjie
•
Li, Yanding
•
Lu, Fachuang
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June 28, 2023
Acs Sustainable Chemistry & Engineering

The chemical complexity of lignin remains a major challengeforlignin valorization into commodity and fine chemicals. A knowledgeof the lignin features that favor its valorization and which plantsproduce such lignins can be used in plant selection or to engineerthem to produce lignins that are more ideally suited for conversion.Sixteen biomass samples were compositionally surveyed by NMR and analyticaldegradative methods, and the yields of phenolic monomers followinghydrogenolytic depolymerization were assessed to elucidate the key determinants controlling thedepolymerization. Hardwoods, including those incorporating monolignol p-hydroxybenzoates into their syringyl/guaiacyl copolymericlignins, produced high monomer yields by hydrogenolysis, whereas grassesincorporating monolignol p-coumarates and ferulatesgave lower yields, on a lignin basis. Softwoods, with their more condensedguaiacyl lignins, gave the lowest yields. Lignins with a high syringylunit content released elevated monomer levels, with a high-syringylpolar transgenic being particularly striking. Herein, we distinguishphenolic monomers resulting from the core lignin vs those from pendentphenolate esters associated with the biomass cell wall, acylatingeither polysaccharides or lignins. The basis for these observationsis rationalized as a means to select or engineer biomass for optimalconversion to worthy phenolic monomers.

Hydrogenolyticdepolymerization of lignin from 16 biomasssamples shows the significant impact of lignin composition on phenolicmonomer yields.

  • Details
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Type
research article
DOI
10.1021/acssuschemeng.3c01320
Web of Science ID

WOS:001016570500001

Author(s)
Chen, Mingjie
•
Li, Yanding
•
Lu, Fachuang
•
Luterbacher, Jeremy S. S.  
•
Ralph, John
Date Issued

2023-06-28

Publisher

AMER CHEMICAL SOC

Published in
Acs Sustainable Chemistry & Engineering
Volume

11

Issue

27

Start page

10001

End page

10017

Subjects

Chemistry, Multidisciplinary

•

Green & Sustainable Science & Technology

•

Engineering, Chemical

•

Chemistry

•

Science & Technology - Other Topics

•

Engineering

•

reductive catalytic fractionation (rcf)

•

biomass

•

commodity chemical

•

lignin composition

•

dfrc

•

nmr

•

saponification

•

reductive catalytic fractionation

•

p-coumaroyl transferase

•

alkali-soluble lignins

•

endosperm cell-walls

•

down-regulation

•

ether cleavage

•

cross-linking

•

maize lignin

•

dfrc method

•

oil palm

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

Available on Infoscience
July 17, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/199205
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