Influence of compressed carbon dioxide on hydrogenation reactions in cyclohexane with a Pd/C catalyst / Jianmin Hao in Industrial & engineering chemistry research, Vol. 47 N°17 (Septembre 2008)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6796–6800 Titre : Influence of compressed carbon dioxide on hydrogenation reactions in cyclohexane with a Pd/C catalyst Type de document : texte imprimé Auteurs : Jianmin Hao, Auteur ; Chunyu Xi, Auteur ; Haiyang Cheng, Auteur Année de publication : 2008 Article en page(s) : p. 6796–6800 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : 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 [article] Influence of compressed carbon dioxide on hydrogenation reactions in cyclohexane with a Pd/C catalyst [texte imprimé] / Jianmin Hao, Auteur ; Chunyu Xi, Auteur ; Haiyang Cheng, Auteur . - 2008 . - p. 6796–6800. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6796–6800 Mots-clés : 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

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