New insights into the mechanism of sorbitol transformation over an original bifunctional catalytic system
Vilcocq, Lea; Cabiac, A; Especel, C; Lacombe, S; Duprez, D
| HERO ID | 4684086 |
|---|---|
| In Press | No |
| Year | 2014 |
| Title | New insights into the mechanism of sorbitol transformation over an original bifunctional catalytic system |
| Authors | Vilcocq, Lea; Cabiac, A; Especel, C; Lacombe, S; Duprez, D |
| Journal | Journal of Catalysis |
| Volume | 320 |
| Page Numbers | 16-25 |
| Abstract | Sorbitol can be selectively transformed into liquid alkanes over a bifunctional catalytic system Pt/ZrO2 + TiO2-WOx. In this paper, we investigated the reaction mechanism by carefully analyzing the numerous products issued from sorbitol and by studying the reactivity of some identified intermediates (1-hexanol 2-hexanol, 2-hexanone, 2,5-dimethyltetrahydrofuran, 1,2-hexanediol and 1,2,6-hexanetriol). This led us to propose that C-C cleavage reactions occur on terminal C-C bonds and mainly consist of dehydrogenation-decarbonylation reactions. The limiting steps of the sorbitol transformation are the isosorbide and mono-oxygenated intermediate transformations, especially the hydrogenation of ketones. It is also assessed that diols or triols with n carbon atoms are mainly converted in compounds with n - 1 carbon atoms. Short compounds (1 to 3 carbon atoms) are obtained via a dehydrogenation-retro-aldol reaction pathway and not from isosorbide conversion. (C) 2014 Elsevier Inc. All rights reserved. |
| Doi | 10.1016/j.jcat.2014.09.012 |
| Wosid | WOS:000347134100003 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Alkanes production; Biofuels; Biomass; Polyol; Pt; TiO2-WOx |