| Titre : | Influence of compressed carbon dioxide on hydrogenation reactions in cyclohexane with a Pd/C catalyst (2008) |
| Auteurs : | Jianmin Hao, Auteur ; Chunyu Xi, Auteur ; Haiyang Cheng, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 47 N°17, Septembre 2008) |
| Article en page(s) : | p. 6796–6800 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | CO2--Hydrogenation Pd/C Catalyst |
| Résumé : | The potential of CO2-expanded liquid media for chemical reactions has been examined in this work, using cyclohexane as a solvent and Pd/C as a heterogeneous catalyst for hydrogenation of styrene, citral, and nitrobenzene with H2. The rate of hydrogenation reactions is increased, and the product selectivity is altered in the CO2-expanded cyclohexane phase.In the hydrogenation of citral, the selectivity to citronellal decreases with CO2 pressure, which changes from ~80% in the neat cyclohexane to ~65% at 16 MPa. The CO2 dissolved in the cyclohexane phase may accelerate the rate of further hydrogenation of citronellal. In the hydrogenation of nitrobenzene, the selectivity to aniline is large >90% in the absence of dense phase CO2 but it increases up to >95% on CO2 pressurization of the liquid reaction phase. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie071453g |
