| Titre : | Kinetics of 4-chlorophenol hydrodechlorination with alumina and activated carbon-supported Pd and Rh catalysts (2009) |
| Auteurs : | Elena Díaz, Auteur ; José A. Casas, Auteur ; Ángel F. Mohedano, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 7, Avril 2009) |
| Article en page(s) : | pp. 3351–3358 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | 4-chlorophenol Hydrodechlorination Y-alumina Stirred basket reactor |
| Résumé : | The hydrodechlorination of 4-chlorophenol promoted by different commercial catalysts based on Pd and Rh on γ-alumina and activated carbon has been investigated in a continuous stirred basket reactor (20−40 °C and 1 bar) in order to analyze the kinetics of the reaction. External and internal mass transfer effects were found to be negligible from the values of the Carberry and Weisz−Prater numbers. The reaction rate showed a first-order dependence with respect to 4-chlorophenol. All catalysts were effective in the removal of 4-chlorophenol, with phenol, cyclohexanone, and cyclohexanol identified as reaction products, although the last one was only detected with the Rh/AC catalyst. The highest apparent kinetic constant values correspond to the hydrogenation of 4-chlorophenol to phenol. These values were in the range 146−478 L/kgcat·h for Pd/Al2O3, 179−713 L/kgcat·h for Pd/AC, and 44−172 L/kgcat·h for Rh/AC. The values of the apparent activation energy for 4-chlorophenol disappearance ranged within 47−58 kJ/mol. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie801462b |
