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Formaldehyde stabilization facilitates lignin monomer production during biomass depolymerization.

Identifieur interne : 001873 ( Main/Exploration ); précédent : 001872; suivant : 001874

Formaldehyde stabilization facilitates lignin monomer production during biomass depolymerization.

Auteurs : Li Shuai [Suisse] ; Masoud Talebi Amiri [Suisse] ; Ydna M. Questell-Santiago [Suisse] ; Florent Héroguel [Suisse] ; Yanding Li [États-Unis] ; Hoon Kim [États-Unis] ; Richard Meilan [États-Unis] ; Clint Chapple [États-Unis] ; John Ralph [États-Unis] ; Jeremy S. Luterbacher [Suisse]

Source :

RBID : pubmed:27846566

Descripteurs français

English descriptors

Abstract

Practical, high-yield lignin depolymerization methods could greatly increase biorefinery productivity and profitability. However, development of these methods is limited by the presence of interunit carbon-carbon bonds within native lignin, and further by formation of such linkages during lignin extraction. We report that adding formaldehyde during biomass pretreatment produces a soluble lignin fraction that can be converted to guaiacyl and syringyl monomers at near theoretical yields during subsequent hydrogenolysis (47 mole % of Klason lignin for beech and 78 mole % for a high-syringyl transgenic poplar). These yields were three to seven times those obtained without formaldehyde, which prevented lignin condensation by forming 1,3-dioxane structures with lignin side-chain hydroxyl groups. By depolymerizing cellulose, hemicelluloses, and lignin separately, monomer yields were between 76 and 90 mole % for these three major biomass fractions.

DOI: 10.1126/science.aaf7810
PubMed: 27846566


Affiliations:


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Le document en format XML

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<term>Catalysis (MeSH)</term>
<term>Cellulose (chemistry)</term>
<term>Chemical Fractionation (MeSH)</term>
<term>Formaldehyde (chemistry)</term>
<term>Lignin (biosynthesis)</term>
<term>Lignin (chemistry)</term>
<term>Plants, Genetically Modified (chemistry)</term>
<term>Plants, Genetically Modified (genetics)</term>
<term>Polymerization (MeSH)</term>
<term>Polysaccharides (chemistry)</term>
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<term>Catalyse (MeSH)</term>
<term>Cellulose (composition chimique)</term>
<term>Formaldéhyde (composition chimique)</term>
<term>Fractionnement chimique (MeSH)</term>
<term>Lignine (biosynthèse)</term>
<term>Lignine (composition chimique)</term>
<term>Polymérisation (MeSH)</term>
<term>Polyosides (composition chimique)</term>
<term>Populus (composition chimique)</term>
<term>Populus (génétique)</term>
<term>Végétaux génétiquement modifiés (composition chimique)</term>
<term>Végétaux génétiquement modifiés (génétique)</term>
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<term>Lignin</term>
<term>Polysaccharides</term>
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<keywords scheme="MESH" qualifier="chemistry" xml:lang="en">
<term>Plants, Genetically Modified</term>
<term>Populus</term>
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<keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr">
<term>Cellulose</term>
<term>Formaldéhyde</term>
<term>Lignine</term>
<term>Polyosides</term>
<term>Populus</term>
<term>Végétaux génétiquement modifiés</term>
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<term>Plants, Genetically Modified</term>
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<term>Catalysis</term>
<term>Chemical Fractionation</term>
<term>Polymerization</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Catalyse</term>
<term>Fractionnement chimique</term>
<term>Polymérisation</term>
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<div type="abstract" xml:lang="en">Practical, high-yield lignin depolymerization methods could greatly increase biorefinery productivity and profitability. However, development of these methods is limited by the presence of interunit carbon-carbon bonds within native lignin, and further by formation of such linkages during lignin extraction. We report that adding formaldehyde during biomass pretreatment produces a soluble lignin fraction that can be converted to guaiacyl and syringyl monomers at near theoretical yields during subsequent hydrogenolysis (47 mole % of Klason lignin for beech and 78 mole % for a high-syringyl transgenic poplar). These yields were three to seven times those obtained without formaldehyde, which prevented lignin condensation by forming 1,3-dioxane structures with lignin side-chain hydroxyl groups. By depolymerizing cellulose, hemicelluloses, and lignin separately, monomer yields were between 76 and 90 mole % for these three major biomass fractions.</div>
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<AbstractText>Practical, high-yield lignin depolymerization methods could greatly increase biorefinery productivity and profitability. However, development of these methods is limited by the presence of interunit carbon-carbon bonds within native lignin, and further by formation of such linkages during lignin extraction. We report that adding formaldehyde during biomass pretreatment produces a soluble lignin fraction that can be converted to guaiacyl and syringyl monomers at near theoretical yields during subsequent hydrogenolysis (47 mole % of Klason lignin for beech and 78 mole % for a high-syringyl transgenic poplar). These yields were three to seven times those obtained without formaldehyde, which prevented lignin condensation by forming 1,3-dioxane structures with lignin side-chain hydroxyl groups. By depolymerizing cellulose, hemicelluloses, and lignin separately, monomer yields were between 76 and 90 mole % for these three major biomass fractions.</AbstractText>
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