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Comparison of gas – liquid–liquid – solid four - phase trickle - bed reactor with upflow reactor under high liquid flow rate / Hiroshi Yamada in Industrial & engineering chemistry research, Vol. 51 N° 26 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 8835–8839 Titre : Comparison of gas – liquid–liquid – solid four - phase trickle - bed reactor with upflow reactor under high liquid flow rate Type de document : texte imprimé Auteurs : Hiroshi Yamada, Auteur ; Yoshiro Ohashi, Auteur ; Tomohiko Tagawa, Auteur Année de publication : 2012 Article en page(s) : pp. 8835–8839 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Gas  liquid Résumé : The hydrogenation of carbobenzoxy phenylalanine was investigated in order to better understand the influence of mass transfer effects in four-phase fixed-bed reactor systems. In this reaction, the carbobenzoxy phenylalanine is dissolved in an organic solvent and is reacted with a gas in the presence of a hydrophilic catalyst (Pd/Al2O3). An aqueous phase is also required to dissolve the reaction product, leading to a four-phase gas–liquid–liquid–solid system. Results indicate that higher liquid flow rates lead to faster rates of reaction due to improved contact efficiency between the organic phase and catalyst. Similar performance was observed through experiment and modeling in two fixed-bed reactor configurations (trickle-bed reactor and gas–liquid cocurrent upflow reactor) at higher liquid flow rates. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201966j [article] Comparison of gas – liquid–liquid – solid four - phase trickle - bed reactor with upflow reactor under high liquid flow rate [texte imprimé] / Hiroshi Yamada, Auteur ; Yoshiro Ohashi, Auteur ; Tomohiko Tagawa, Auteur . - 2012 . - pp. 8835–8839. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 26 (Juillet 2012) . - pp. 8835–8839 Mots-clés : Gas  liquid Résumé : The hydrogenation of carbobenzoxy phenylalanine was investigated in order to better understand the influence of mass transfer effects in four-phase fixed-bed reactor systems. In this reaction, the carbobenzoxy phenylalanine is dissolved in an organic solvent and is reacted with a gas in the presence of a hydrophilic catalyst (Pd/Al2O3). An aqueous phase is also required to dissolve the reaction product, leading to a four-phase gas–liquid–liquid–solid system. Results indicate that higher liquid flow rates lead to faster rates of reaction due to improved contact efficiency between the organic phase and catalyst. Similar performance was observed through experiment and modeling in two fixed-bed reactor configurations (trickle-bed reactor and gas–liquid cocurrent upflow reactor) at higher liquid flow rates. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201966j