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Gas-limited hydrogenation of 1-octene in a fixed bed / F. Reynders in Industrial & engineering chemistry research, Vol. 50 N° 18 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10476–10479 Titre : Gas-limited hydrogenation of 1-octene in a fixed bed : upflow versus downflow Type de document : texte imprimé Auteurs : F. Reynders, Auteur ; W. Nicol, Auteur Année de publication : 2011 Article en page(s) : pp. 10476–10479 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Downward  flow  Upward  flow  Fixed  bed  Hydrogenation Résumé : Two downflow operational modes with different hydrodynamic states were compared to upflow operation. Various gas-limited conditions (γ = 15—60) were employed. The downflow mode with the higher wetting efficiency consistently outperformed the downflow mode with the lower wetting efficiency. Both downflow modes outperformed the upflow mode at high gas mass fluxes and underachieved against upflow at lower gas mass fluxes. The results stand in contradiction to the theory on direct gas-solid mass transfer under trickle-flow conditions. The switching behavior of the upflow mode performance was attributed to hydrodynamic regime shifts, hinting that the perceived "poor" performance of upflow reactors under gas limited conditions might be linked to slugging in laboratory-scale reactors. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523869 [article] Gas-limited hydrogenation of 1-octene in a fixed bed : upflow versus downflow [texte imprimé] / F. Reynders, Auteur ; W. Nicol, Auteur . - 2011 . - pp. 10476–10479. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10476–10479 Mots-clés : Downward  flow  Upward  flow  Fixed  bed  Hydrogenation Résumé : Two downflow operational modes with different hydrodynamic states were compared to upflow operation. Various gas-limited conditions (γ = 15—60) were employed. The downflow mode with the higher wetting efficiency consistently outperformed the downflow mode with the lower wetting efficiency. Both downflow modes outperformed the upflow mode at high gas mass fluxes and underachieved against upflow at lower gas mass fluxes. The results stand in contradiction to the theory on direct gas-solid mass transfer under trickle-flow conditions. The switching behavior of the upflow mode performance was attributed to hydrodynamic regime shifts, hinting that the perceived "poor" performance of upflow reactors under gas limited conditions might be linked to slugging in laboratory-scale reactors. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523869