Nonlinear behavior of reactor-separator-recycle systems

Costin S. Bildea, Alexandre C. Dimian, Piet D. Iedema

Research output: Contribution to journalConference articlepeer-review

45 Citations (Scopus)


The nonlinear behavior of reactor-separator-recycle systems is studied. The dimensionless mole-balance equations are parameterized by the plant Damkohler number (Da) and the separation specifications. Reactant accumulation does not occur if Da > Da(cr). Da(cr) corresponds to a bifurcation point of the mole-balance equations and depends on separation performance. For one reactant recycle and high purity separation, Da(cr)=1. When two reactants are recycled, multiple steady states are possible. In this case, Da(cr) depends also on the control structure. Close to Da(cr), control structures must change the reaction volume or temperature in order to reject effectively the disturbances. (C) 2000 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)209-215
Number of pages7
JournalComputers and Chemical Engineering
Issue number2-7
Publication statusPublished - Jul 15 2000
Event7th International Symposium on Process Systems Engineering - Keystone, CO, USA
Duration: Jul 16 2000Jul 21 2000


  • Control
  • Design
  • Nonlinear analysis
  • Reactor-separator-recycle

ASJC Scopus subject areas

  • General Chemical Engineering
  • Computer Science Applications


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