BOURBIAUX, Dolorès; XU, Yu; BUREL, L.; GOC, Firat; FONGARLAND, P.; PHILIPPE, Régis; AUBERT, Guillaume; AYMONIER, Cyril; RATABOUL, F.; DJAKOVITCH, Laurent

doi:10.3390/catal11111311

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BOURBIAUX, Dolorès
Institut de recherches sur la catalyse et l'environnement de Lyon [IRCELYON]

XU, Yu
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

BUREL, L.
Institut de recherches sur la catalyse et l'environnement de Lyon [IRCELYON]
IRCELYON-Microscopie [MICROSCOPIE]

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Article de revue

Ce document a été publié dans

Catalysts. 2021, vol. 11, n° 11, p. 1311

MDPI

Résumé en anglais

Lignin is one of the main components of lignocellulosic biomass and corresponds to the first renewable source of aromatic compounds. It is obtained as a by-product in 100 million tons per year, mainly from the paper industry, from which only 2–3% is upgraded for chemistry purposes, with the rest being used as an energy source. The richness of the functional groups in lignin makes it an attractive precursor for a wide variety of aromatic compounds. With this aim, we investigated the Pd-catalyzed depolymerization of lignin under mild oxidizing conditions (air, 150 °C, and aqueous NaOH) producing oxygenated aromatic compounds, such as vanillin, vanillic acid, and acetovanillone. Palladium catalysts were implemented following different strategies, involving nanoparticles stabilized in water, and nanoparticles were supported on TiO2. Significant conversion of lignin was observed in all cases; however, depending on the catalyst nature and the synthetic methods, differences were observed in terms of selectivity in aromatic monomers, mainly vanillin. All these aspects are discussed in detail in this report, which also provides new insights into the role that Pd-catalysts can play for the lignin depolymerization mechanism.< Réduire

Mots clés en anglais

lignin

oxidative depolymerization

heterogeneous catalysis

metallic nanoparticles

palladium

DOI

http://dx.doi.org/10.3390/catal11111311

Project ANR

Nouveau concept intégré pour la conversion de la lignine en produits chimiques utilisant des nanoparticules de palladium confinées

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026