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Multiobjective optimization of an industrial nylon‐6 semibatch reactor system using genetic algorithm
Author(s) -
Raj Gupta Ravi,
Gupta Santosh K.
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19990801)73:5<729::aid-app13>3.0.co;2-3
Subject(s) - sorting , genetic algorithm , product (mathematics) , monomer , multi objective optimization , materials science , mathematics , control theory (sociology) , algorithm , chemical engineering , process engineering , computer science , mathematical optimization , control (management) , engineering , polymer , composite material , geometry , artificial intelligence
Multiobjective Pareto optimal solutions for three different grades of nylon‐6 produced in an industrial semibatch reactor are obtained by using the adapted Nondominated Sorting Genetic Algorithm (adapted NSGA). The two objective functions minimized are the total reaction time and the concentration of undesirable cyclic dimer in the product, while simultaneously attaining desired values of the monomer conversion and the number average chain length. The control variables used are the fractional valve opening f ( t ) and the jacket fluid temperature T J . The study shows a marked improvement over current industrial operation. It is found that the optimal values of the cyclic dimer concentration in the product are worse (higher) when the reactor‐control valve system is studied than when the reactor is considered alone . This is because the control valve leads to additional constraints. The technique used is quite general and can be used to study other reactor systems as well. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 729–739, 1999