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Hierarchical control of a train of continuous polymerization reactors
Author(s) -
Kiparissides C.,
Ponnuswamy S. R.
Publication year - 1981
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450590616
Subject(s) - monomer , polymerization , work (physics) , control theory (sociology) , chemical reactor , continuous stirred tank reactor , controller (irrigation) , materials science , coolant , nuclear engineering , chemical engineering , control (management) , computer science , thermodynamics , engineering , physics , polymer , agronomy , artificial intelligence , biology , composite material
A multilayer control scheme is synthesized for a series of polymerization stirred tank reactors to control the monomer conversion over the reactor line. In this work two layers of control are implemented. In the' first level digital PI or self‐tuning regulators (STR) are used to control the reaction temperature of each reactor in the series by manipulating the flowrates of the coolant streams. In the second layer, a locally linear state space model, that can predict the monomer concentration in each reactor, is derived based on steady‐state energy balances. A quadratic performance index is then minimized to obtain the optimal reaction profile that will bring the monomer distribution over the reactor line to its desired target value.