Article Dans Une Revue ChemCatChem Année : 2023

Catalytic Hydrogenation of Hemicellulosic Sugars: Reaction Kinetics and Influence of Sugar Structure on Reaction Rate

Résumé

Hemicelluloses are a major component of lignocellulosic biomass. Different sugars can be obtained from hemicelluloses: xylose, arabinose, galactose, mannose, glucose. Their catalytic hydrogenation produces polyols: xylitol, arabinitol, dulcitol, mannitol, sorbitol, which are valuable chemicals and platform molecules. In this paper, the hydrogenation of sugars was investigated with a Ru/TiO 2 catalyst. The influence of temperature, pressure, xylose concentration and catalyst amount was studied for xylose hydrogenation and a Langmuir‐Hinshelwood kinetic model was designed. The comparative study of five hemicellulose sugars showed a strong impact of sugar structure on hydrogenation rate: hexoses (glucose, mannose, galactose) react slower than pentoses (xylose, arabinose).

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hal-04307642 , version 1 (26-11-2023)

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Victoria D S Freitas, Ana Paez, Pascal Fongarland, Régis Philippe, Léa Vilcocq. Catalytic Hydrogenation of Hemicellulosic Sugars: Reaction Kinetics and Influence of Sugar Structure on Reaction Rate. ChemCatChem, 2023, 15 (13), pp.e202300263. ⟨10.1002/cctc.202300263⟩. ⟨hal-04307642⟩
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