title: Cellulose conversion with tungstated-alumina-based catalysts: influence of the presence of platinum and mechanistic studies.
abstract: The performances of platinum supported on tungstated alumina (Pt/AlW) in the hydrothermal conversion of cellulose at 190 °C under H2 pressure were evaluated and compared to that of Pt-free tungstated alumina (AlW). We show that the presence of Pt significantly increased the extent of conversion and led to a different product distribution with the formation of acetol and propylene glycol as the main products and a global yield of up to 40 %. Based on previous reports, we propose the formation of pyruvaldehyde on the Lewis acid sites of the tungstated alumina as a key intermediate. Pyruvaldehyde can then be transformed to acetol and propylene glycol or lactic acid depending on the presence or absence of supported Pt.
authors: Institut de Recherche sur la Catalyse et l'Environnement de Lyon, IRCELYON, Université Lyon 1, CNRS, UMR5256, 2 avenue Albert Einstein, 69626 Villeurbanne, France.
authors: Flora
authors: F
authors: Chambon
authors: Franck
authors: F
authors: Rataboul
authors: Catherine
authors: C
authors: Pinel
authors: Amandine
authors: A
authors: Cabiac
authors: Emmanuelle
authors: E
authors: Guillon
authors: Nadine
authors: N
authors: Essayem
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D002384:Catalysis; D002482:Cellulose / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry; D058116:Lewis Acids / Q000737:chemistry; D010984:Platinum / Q000737:chemistry*; D013379:Substrate Specificity; D017973:Tungsten Compounds / Q000737:chemistry*
chemical_list: D058116:Lewis Acids; D017973:Tungsten Compounds; D010984:Platinum; D006859:Hydrogen; D002482:Cellulose; D000537:Aluminum Oxide; C045951:tungstate