Condensed mode cooling of ethylene polymerization in fluidized bed reactors

TFL McKenna - Macromolecular Reaction Engineering, 2019 - Wiley Online Library
This review gives an overview of the evolution of the technology of condensed mode
cooling, primarily for the case of ethylene polymerization on supported catalysts in fluidized …

Modeling condensed mode operation for ethylene polymerization: part I. Thermodynamics of sorption

A Alizadeh, J Chmelař, F Sharif… - Industrial & …, 2017 - ACS Publications
A process model based on the thermodynamic models of Sanchez–Lacombe and PC-SAFT
EoS is developed to simulate and analyze the impact of vaporized n-hexane as an induced …

Solubility and diffusivity of propylene, ethylene, and propylene–ethylene mixtures in polypropylene

AJ Cancelas, MA Plata, MA Bashir… - Macromolecular …, 2018 - Wiley Online Library
The solubility of propylene, ethylene, and propylene–ethylene mixtures in isotactic
polypropylene (iPP) is measured with a high‐pressure sorption balance at different …

Modeling condensed mode operation for ethylene polymerization: part III. Mass and heat transfer

A Alizadeh, F Sharif, M Ebrahimi… - Industrial & …, 2018 - ACS Publications
The polymer flow model is employed to predict the transient behavior of the concentration
and temperature profiles within the growing particles during gas-phase ethylene …

Systematic Comparison of Slurry and Gas‐Phase Polymerization of Ethylene: Part I Thermodynamic Effects

A Alizadeh, V Touloupidis… - Macromolecular Reaction …, 2021 - Wiley Online Library
Abstract The Sanchez–Lacombe model is used to investigate the multiphase and
multicomponent thermodynamic equilibrium during ethylene polymerization and ethylene/1 …

Computational fluid dynamics simulation of gas–liquid–solid polyethylene fluidized bed reactors incorporating with a dynamic polymerization kinetic model

P Hui, L Yuan‐Xing… - Asia‐Pacific Journal of …, 2019 - Wiley Online Library
A comprehensive polymerization kinetics model that includes site formation, chain initiation,
chain propagation, chain transfer and chain deactivation elementary reactions was …

Multicomponent Solubility of Vapors in Polyethylene: an experimental and theoretical analysis

A Ben Mrad, S Norsic, N Sheibat-Othman… - Industrial & …, 2021 - ACS Publications
A pressure decay method is used to measure the overall and individual solubilities of
multicomponent gas mixtures in different polyethylenes. The new apparatus was validated …

A novel approach for the estimation of the Sanchez-Lacombe interaction parameters for the solubility of ternary polyolefins systems

AB Mrad, N Sheibat-Othman, J Hill, M Bartke… - Chemical Engineering …, 2021 - Elsevier
The total solubility of ethylene in LLDPE in presence of propane, isobutane and 1-butene is
measured using a gravimetric technique at 70° C and pressures up to 5 bars. In order to …

Condensed mode cooling for ethylene polymerization: part IV. The effect of temperature in the presence of induced condensing agents

FN Andrade, TFL McKenna - Macromolecular Chemistry and …, 2017 - Wiley Online Library
An experimental investigation of the impact of changes in temperature on the observed rate
of polymerization of ethylene in the gas phase using a commercial Ziegler–Natta catalyst in …

Influence of process parameters on the gas phase polymerization of ethylene: RSM or ANN statistical methods?

NB Ishola, TFL McKenna - Macromolecular Theory and …, 2021 - Wiley Online Library
The direct and interactive effects of process variables, including the use of iso‐pentane as
an inert condensing agent, on the rate of polymerization and main physical properties of …