Use of interval optimization for finding limiting flows of batch extractive distillation

Erika R. Frits, Mihály Cs Markót, Tibor Csendes, Zoltán Lelkes, Zsolt Fonyó, Endre Rév

Research output: Contribution to journalArticle

1 Citation (Scopus)


The feasibility study on batch extractive distillation is based on analysing profile maps. Existence and loci of singular points and separatrices in these maps depend on the process parameters; and the limiting flows of the process belong to those parameter values at which the map changes shape. These data can be roughly estimated by graphical tools, but cannot be determined with certainty. One cannot be sure whether a singularity exists, if not found. Reliable computation of all the zeroes or all the minima of real functions, on the other hand, is provided by applying interval computation. Therefore, the problems of finding the singular points and the bifurcation points are reformulated as minimization problems and are solved by an interval arithmetic based branch and bound optimizer. All the singular points of the maps have been found in this way at specified process parameters. Limiting flows are determined with the same methodology by finding the bifurcation points and the corresponding parameter values.

Original languageEnglish
Pages (from-to)661-666
Number of pages6
JournalComputer Aided Chemical Engineering
Issue numberC
Publication statusPublished - Dec 1 2005


  • bifurcation
  • extractive distillation
  • feasibility
  • interval arithmetic
  • profile map

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Computer Science Applications

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