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Cellulose Conversion with Tungstated‐Alumina‐Based Catalysts: Influence of the Presence of Platinum and Mechanistic Studies
Author(s) -
Chambon Flora,
Rataboul Franck,
Pinel Catherine,
Cabiac Amandine,
Guillon Emmanuelle,
Essayem Nadine
Publication year - 2013
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201200880
Subject(s) - cellulose , catalysis , platinum , chemistry , yield (engineering) , hydrothermal circulation , lewis acids and bases , product distribution , inorganic chemistry , organic chemistry , chemical engineering , materials science , metallurgy , engineering
The performances of platinum supported on tungstated alumina (Pt/AlW) in the hydrothermal conversion of cellulose at 190 °C under H 2 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.