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Fluidized-Bed Reactor for the Intensification of Gas-Phase Photocatalytic Oxidative Dehydrogenation of Cyclohexane / Vincenzo Palma in Industrial & engineering chemistry research, Vol. 49 N° 21 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10279-10286 Titre : Fluidized-Bed Reactor for the Intensification of Gas-Phase Photocatalytic Oxidative Dehydrogenation of Cyclohexane Type de document : texte imprimé Auteurs : Vincenzo Palma, Auteur ; Diana Sannino, Auteur ; Vincenzo Vaiano, Auteur Année de publication : 2011 Article en page(s) : pp. 10279-10286 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Dehydrogenation  Oxidation  Photocatalysis  Fluidized  bed  reactor Résumé : The behavior of a two-dimensional laboratory-scale fluidized-bed catalytic reactor for the photocatalytic oxidative dehydrogenation of cyclohexane to benzene has been studied, employing a molybdenum-based catalyst and a titania-alumina mixed oxide as a support. A preliminary mathematical model is proposed for the evaluation of the effect of the main factors that affect the overall reactor performances. Experimental data evinced that the reaction rate is not dependent on the oxygen concentration; instead, it depends on cyclohexane concentration, according to Langmuir―Hinshelwood (LH)-type kinetics. Taking into account that the interaction between photoexcited molybdate and adsorbed cyclohexane is the rate-limiting step, the functionality in light intensity was found. The mathematical model describes the performance of the photocatalytic fluidized-bed reactor well for all operating conditions examined. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23447918 [article] Fluidized-Bed Reactor for the Intensification of Gas-Phase Photocatalytic Oxidative Dehydrogenation of Cyclohexane [texte imprimé] / Vincenzo Palma, Auteur ; Diana Sannino, Auteur ; Vincenzo Vaiano, Auteur . - 2011 . - pp. 10279-10286. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10279-10286 Mots-clés : Dehydrogenation  Oxidation  Photocatalysis  Fluidized  bed  reactor Résumé : The behavior of a two-dimensional laboratory-scale fluidized-bed catalytic reactor for the photocatalytic oxidative dehydrogenation of cyclohexane to benzene has been studied, employing a molybdenum-based catalyst and a titania-alumina mixed oxide as a support. A preliminary mathematical model is proposed for the evaluation of the effect of the main factors that affect the overall reactor performances. Experimental data evinced that the reaction rate is not dependent on the oxygen concentration; instead, it depends on cyclohexane concentration, according to Langmuir―Hinshelwood (LH)-type kinetics. Taking into account that the interaction between photoexcited molybdate and adsorbed cyclohexane is the rate-limiting step, the functionality in light intensity was found. The mathematical model describes the performance of the photocatalytic fluidized-bed reactor well for all operating conditions examined. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23447918