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Dynamic modeling of the reactive twin - screw corotating extrusion process / T. Goma-Bilongo in Industrial & engineering chemistry research, Vol. 51 N° 35 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11381-11388 Titre : Dynamic modeling of the reactive twin - screw corotating extrusion process : Experimental validation by using inlet glass fibers injection response and application to polymers degassing Type de document : texte imprimé Auteurs : T. Goma-Bilongo, Auteur ; F. Couenne, Auteur ; C. Jallut, Auteur Année de publication : 2012 Article en page(s) : pp. 11381-11388 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Degassing  Glass  fiber  Extrusion  Modeling  Dynamic  model Résumé : In this Article is described an original dynamic model of a reactive corotating twin-screw extrusion (TSE) process operated by the Rhodia Co. for the Nylon-66 degassing finishing step. To validate the model, dynamic experiments have been performed on a small-scale pilot plant. These experiments consist of a temporary injection of glass fibers at the inlet of the extruder after it has reached a given operating point. The outlet glass fibers mass fraction time variation is then measured. This experiment does not lead to the RTD measurement. As a matter of fact, due to the high quantity of glass fibers that is introduced, the behavior of the flow through the extruder is perturbed so that the glass fibers cannot be considered as an inert tracer. The dynamic model that we have published elsewhere (Choulak et al. Ind. Eng. Chem. Res. 2004, 43, 7373-7382) is adapted to take into account this nonlinear behavior of the extruder with respect to the glass fibers injection and is favorably compared to experimental results. The description of the degassing operation is also included in the model. The model allows simulations of the complete dynamic behavior of the process. When the steady state is reached, the good position of the degassing vent with respect to the partially and fully filled zones positions can also be checked, thus illustrating the way the model can be used for design purposes. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324787 [article] Dynamic modeling of the reactive twin - screw corotating extrusion process : Experimental validation by using inlet glass fibers injection response and application to polymers degassing [texte imprimé] / T. Goma-Bilongo, Auteur ; F. Couenne, Auteur ; C. Jallut, Auteur . - 2012 . - pp. 11381-11388. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11381-11388 Mots-clés : Degassing  Glass  fiber  Extrusion  Modeling  Dynamic  model Résumé : In this Article is described an original dynamic model of a reactive corotating twin-screw extrusion (TSE) process operated by the Rhodia Co. for the Nylon-66 degassing finishing step. To validate the model, dynamic experiments have been performed on a small-scale pilot plant. These experiments consist of a temporary injection of glass fibers at the inlet of the extruder after it has reached a given operating point. The outlet glass fibers mass fraction time variation is then measured. This experiment does not lead to the RTD measurement. As a matter of fact, due to the high quantity of glass fibers that is introduced, the behavior of the flow through the extruder is perturbed so that the glass fibers cannot be considered as an inert tracer. The dynamic model that we have published elsewhere (Choulak et al. Ind. Eng. Chem. Res. 2004, 43, 7373-7382) is adapted to take into account this nonlinear behavior of the extruder with respect to the glass fibers injection and is favorably compared to experimental results. The description of the degassing operation is also included in the model. The model allows simulations of the complete dynamic behavior of the process. When the steady state is reached, the good position of the degassing vent with respect to the partially and fully filled zones positions can also be checked, thus illustrating the way the model can be used for design purposes. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324787