Control of integrated process networks-A multi-time scale perspective

Michael Baldea, Prodromos Daoutidis

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


In this work, we consider a generic class of process networks that feature large material recycle streams and in which impurities are present, and are removed by a small purge stream. We show that such networks exhibit a dynamic behavior featuring three time scales. Employing a nested application of singular perturbation arguments, we propose a method for deriving non-linear, non-stiff, reduced order models for the dynamics in each time scale. Subsequently, we propose a hierarchical controller design framework that takes advantage of the identified time scale multiplicity. The developed concepts are exemplified through a case study on the dynamics and control of a reactor-single-stage separator network core, and illustrative numerical simulation results are provided.

Original languageEnglish (US)
Pages (from-to)426-444
Number of pages19
JournalComputers and Chemical Engineering
Issue number5-6
StatePublished - May 2007

Bibliographical note

Funding Information:
Financial support for this work by the National Science Foundation, grant CTS-0234440, is gratefully acknowledged.


  • Model reduction
  • Plant-wide control
  • Singular perturbations


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