Multi-objective optimization of industrial styrene reactor: Adiabatic and pseudo-isothermal operation

Ashish M. Gujarathi, B. V. Babu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


Multi-objective differential evolution (MODE) is used to optimize an industrial styrene reactor considering productivity, selectivity and yield as the main objectives. Two reactor configurations (single bed adiabatic operation and steam injected pseudo-isothermal operation) and four combinations of objectives consisting of 5 and 7 variables respectively are considered. Pareto optimal solutions are obtained for all combinations of objective functions for both the configurations. The results are compared with those reported in the literature and an industrial operating point. For all the cases considered, MODE is able to give a Pareto front better (in terms of wider range and a better spread) than that obtained using NSGA for both the configurations. Steam injected reactor configuration is better than the adiabatic reactor configuration in terms of performance. The Pareto optimal solutions obtained from such studies provide a wide range of optimal operating conditions from which an appropriate operating point can be selected based on the requirements of the decision maker.

Original languageEnglish
Pages (from-to)2009-2026
Number of pages18
JournalChemical Engineering Science
Issue number6
Publication statusPublished - 2010
Externally publishedYes


  • Multi-objective differential evolution
  • Optimization
  • Pareto front
  • Polymer processing
  • Reaction engineering
  • Simulation
  • Styrene

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering


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