Cellulose Conversion with Tungstated‐Alumina‐Based Catalysts: Influence of the Presence of Platinum and Mechanistic Studies. Issue 3 (20th February 2013)

• Record Type: Journal Article
• Authors: Chambon, Flora; Rataboul, Franck; Pinel, Catherine; Cabiac, Amandine; Guillon, Emmanuelle; Essayem, Nadine
• Is Part Of: ChemSusChem. Volume 6:Issue 3(2013:Mar.)
• Page Start: 500
• Page End: 507
• Publication Date: 2013-02-20
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201200880
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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.</p> </abstract>