An effectiveness factor model for slurry phase olefin polymerizations

Shuaifeng Zhang, Qinghua Zhang*, Bo Kong*, Chao Yang*, Rodney O. Fox

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The multigrain model (MGM) is the most widely used single-particle model, giving a detailed description of phenomena during olefin polymerization. However, the detailed modeling of the diffusion–reaction process inside the catalyst particles requires solving a large number of ordinary differential equations, which is unsuitable for coupling with multiphase CFD tools. That is the reason why the current CFD simulation studies of olefin polymerization reactors rarely consider intraparticle transport. To fill this gap, an effectiveness factor model (EFM) is developed from MGM for slurry olefin polymerizations. It maintains the multilevel framework of MGM and is suitable for use in multiphase CFD simulations. The MGM and EFM are first implemented into OpenFOAM. Moreover, the EFM has been validated by comparison with literature data. Detailed comparisons between MGM and EFM show that the EFM can produce similar results as the MGM with a much lower computation cost for olefin slurry polymerization when αi,mp < 2.0.

Original languageEnglish
Article number117429
JournalChemical Engineering Science
Volume251
Early online date13 Jan 2022
DOIs
StatePublished - 6 Apr 2022

Keywords

  • Multigrain model
  • Slurry phase polymerization
  • Catalyzed olefin polymerization
  • Effectiveness factor

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