Dynamic Multi-Phase, Multi-Zone Modeling of Flash Separators for Highly Viscous Polymerization Processes

Summary A multi‐phase, multi‐zone mathematical model is developed to describe the dynamic operation of an industrial high‐pressure flash separator for a ternary (Ethylene–Vinyl acetate–EVA) system. The proposed description of the high‐pressure separator can take into account the complex gas carry‐un...

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Bibliographic Details
Published in:Macromolecular reaction engineering 2014-04, Vol.8 (4), p.392-405
Main Authors: Pladis, Prokopis, Baltsas, Apostolos, Kanellopoulos, Vasileios, Kiparissides, Costas
Format: Article
Language:English
Subjects:
ethylene vinyl acetate
high pressure production technology
high pressure separators
LDPE
Mathematical models
polyolefin
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Summary:Summary A multi‐phase, multi‐zone mathematical model is developed to describe the dynamic operation of an industrial high‐pressure flash separator for a ternary (Ethylene–Vinyl acetate–EVA) system. The proposed description of the high‐pressure separator can take into account the complex gas carry‐under and liquid droplets carry‐over phenomena occurring during the non‐equilibrium operation of the separator. Numerical simulations have been carried out to determine the effect of operating conditions on the dynamic operation and separation efficiency of a HPS unit operating in series with an industrial scale high‐pressure EVA autoclave. The proposed model is capable of simulating the dynamic operation of an industrial‐scale HPS over a wide range of operating conditions and EVA copolymer grades. A multi‐phase, multi‐zone mathematical model has been developed to describe the dynamic operation of an industrial high‐pressure flash separator for a ternary (ethylene–vinyl acetate–EVA) system. The model takes into account the complex gas carry‐under and liquid droplets carry‐over phenomena occurring in the separator.
ISSN:1862-832X
1862-8338
DOI:10.1002/mren.201300169