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On the Production of Polyolefins with Bimodal Molecular Weight and Copolymer Composition Distributions in Catalytic Gas‐Phase Fluidized‐Bed Reactors
Author(s) -
Chatzidoukas Christos,
Kanellopoulos Vassileios,
Kiparissides Costas
Publication year - 2007
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.200700033
Subject(s) - copolymer , catalysis , fluidized bed , ethylene , chemical engineering , phase (matter) , materials science , gas phase , kinetic energy , thermodynamics , chemistry , organic chemistry , polymer , composite material , physics , engineering , quantum mechanics
A comprehensive mathematical model is developed for the dynamic calculation of the molecular distributed properties (i.e. MWD and CCD) in a gas‐phase, catalytic, ethylene‐1‐butene copolymerization, FBR, taking into account the various kinetic, micro‐ and macroscopic phenomena in the reactor. The effects of the two single‐site catalyst mass fractions and reactor operating conditions on the production of polyolefins with ‘tailor‐made’ bimodal molecular properties are investigated. It is shown that PE grades with either a bimodal MWD or CCD can be produced in a single FBR, using a mixture of two single‐site catalysts under properly selected operating conditions.