| Titre : | Selective hydrogenation of cinnamaldehyde over Pt and Pd supported on multiwalled carbon nanotubes in a CO2 - expanded alcoholic medium (2012) |
| Auteurs : | Bao-Hui Zhao, Auteur ; Jian-Gang Chen, Auteur ; Xuan Liu, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 34, Août 2012) |
| Article en page(s) : | pp. 11112-11121 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Carbon dioxide Hydrogenation |
| Résumé : | Pt/MWCNT and Pd/MWCNT nanocatalysts were prepared via a liquid reduction method. The selective hydrogenation of cinnamaldehyde (CAL) was investigated over 5.0 wt.% Pt/MWCNT and 5.0 wt% Pd/MWCNT catalysts in a CO2-enpanded alcoholic medium at different reaction conditions. The hydrogenation selectivities over these two catalyst types were shown to be entirely different. It was found that the Pt/MWCNT catalysts are highly selective for C=O bonds, giving the unsaturated alcohol a selectivity for cinnamyl alcohol (COL) of 97.3% and a conversion rate for cinnamaldehyde of 99.3%. Conversely, the Pd/MWCNT catalyst is highly selective for C=C bonds, producing a saturated aldehyde with a selectivity for hydrocinnamaldehyde (HCAL) of 91.3% and a conversion rate for cinnamaldehyde of 98.6%. The small diameter of the Pt or Pd granules over the multiwalled carbon nanotubes (MWCNTs) leads to a high catalyst activity, and an increase of CO2 pressure results in a better hydrogenation performance for C=O bonds than that for C=C bonds. |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26299436 |
