| Titre : | Dynamic Modeling of a Moving-Packed-Bed Reactor for the Solid-State Polymerization of Bisphenol-A Polycarbonate (2008) |
| Auteurs : | Yuesheng Ye, Auteur ; Kyu Yong Choi, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 47 N°10, Mai 2008) |
| Article en page(s) : | p. 3687-3699 |
| Langues : | Anglais |
| Tags : | Dynamic Modeling ; Polymerization Polycarbonate |
| Résumé : | A dynamic process model has been developed for a continuous solid-state step-growth polymerization of bisphenol-A polycarbonate in a moving-packed-bed reactor. In this process, the molecular weight of polycarbonate prepolymer particles is increased as they move downward in a vertical reactor. A heated purge gas is supplied to the bottom of the reactor and flows upward at a high flow rate to remove volatile condensates from the polymer particles and provide thermal energy for the solid-state polymerization. A macroscopic reactor model and a polymer particle model are combined and solved together to calculate the reactor temperature profiles and the polymer-molecular-weight properties. The effects of reactor design and operation parameters on the performance of the solid-state polymerization reactor are analyzed through model simulations. It is shown that a large-scale moving-packed-bed reactor can have a significant temperature nonuniformity in the reactor, particularly during the startup operation, affecting the uniformity of the molecular weight of the polymer in the product. |
| En ligne : | https://pubs.acs.org/doi/abs/10.1021/ie071078s |
