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Low‐density polyethylene vessel reactors: Part I: Steady state and dynamic modelling
Author(s) -
Marini Luigi,
Georgakis Christos
Publication year - 1984
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690300308
Subject(s) - polymerization , polyethylene , mixing (physics) , thermodynamics , volumetric flow rate , chemistry , materials science , mechanics , polymer chemistry , chemical engineering , polymer , composite material , engineering , physics , quantum mechanics
By the use of a perfectly mixed model and an imperfectly mixed one for lowdensity polyethylene vessel reactors, we show that increases in the initiator consumption with polymerization temperature are due to mixing limitations at the initiator feed. With all its parameters independently estimated, the imperfectly mixed model provides an excellent agreement with experimental data for several initiators, feed flow rates and polymerization pressures. In the temperature region of industrial interest for each type of initiator, the open‐loop reactor dynamics drastically change from open‐loop unstable, at low temperatures, to open‐loop stable at high polymerization temperatures.