Modeling of a Fluidized Bed Propylene Polymerization Reactor Operated in Condensed Mode

Abstract

Condensed mode operation of fluidized bed propylene polymerization reactors allows increased polymer production capacity by using condensing agents to enhance heat removal. Modelling this process requires accounting for the complex interactions between the vapour-liquid equilibrium, heat and mass transfer, and polymerization kinetics within the fluidized bed. This study presents a comprehensive model for a fluidized bed propylene polymerization reactor operated in condensed mode.

The model incorporates vapour-liquid equilibrium calculations to determine the phase distribution of condensing agents within the reactor, coupled with a population balance model for predicting particle size distribution and reactor performance. The effects of key operating variables on reactor performance, including condensate fraction, temperature, and monomer partial pressure, are investigated. The model predictions are compared with available plant data to demonstrate its validity. The results provide insight into the complex behaviour of condensed mode operation and offer a framework for optimising reactor performance and ensuring stable operation of industrial fluidized bed polypropylene reactors.

@article{utikar2008modeling,
  title         = {Modeling of a Fluidized Bed Propylene Polymerization Reactor Operated in
                  Condensed Mode},
  author        = {Utikar, Ranjeet P and Harshe, Yogesh M and Mehra, Anurag and Ranade, Vivek V},
  year          = 2008,
  journal       = {Journal of Applied Polymer Science},
  publisher     = {Wiley Subscription Services, Inc.},
  volume        = 108,
  number        = 4,
  pages         = {2067--2076}
}