Dynamic modeling of gas phase propylene homopolymerization in fluidized bed reactors

Ahmad Shamiri, Mohamed Azlan Hussain, Farouq Sabri Mjalli, Navid Mostoufi, Mohammad Saleh Shafeeyan

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

A new model with comprehensive kinetics for propylene homopolymerization in fluidized bed reactors was developed to investigate the effect of mixing, operating conditions, kinetic and hydrodynamic parameters on the reactor performance as well as polymer properties. Presence of the particles in the bubbles and the excess gas in the emulsion phase was considered to improve the two-phase model, thus, considering the polymerization reaction to take place in both the bubble and emulsion phases. It was shown that in the practical range of superficial gas velocity and catalyst feed rate, the ratio of produced polymer in the bubble phase to the total production rate is roughly between 10% and 13%, which is a substantial amount and cannot be ignored. Simulation studies were carried out to compare the results of the improved two-phase, conventional well-mixed and constant bubble size models. The improved two-phase and well mixed models predicted a narrower and safer window at the same running conditions compared with the constant bubble size model. The improved two-phase model showed close dynamic behavior to the conventional models at the beginning of polymerization, but starts to diverge with the evolution of time.

Original languageEnglish
Pages (from-to)1189-1199
Number of pages11
JournalChemical Engineering Science
Volume66
Issue number6
DOIs
Publication statusPublished - Mar 15 2011

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Keywords

  • Bubble
  • Catalyst
  • Emulsion
  • Fluidization
  • Mathematical modeling
  • Propylene polymerization

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Applied Mathematics
  • Industrial and Manufacturing Engineering

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