Dynamic analysis of heterogeneous azeotropic distillation

Soemantri Widagdo, Warren D. Seider, Donald H. Sebastian

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


A model and algorithm are presented for the separation of mixtures where the phase distribution on the trays is extremely uncertain, as it occurs when the mixtures have two partially‐miscible binary pairs and a minimum‐boiling ternary azeotrope. Included are an algorithm for the consistent initialization of index‐I differential/algebric equations, a novel algorithm for branch switching when the phase distribution changes at a real bifurcation point, and a reliable algorithm for phase stability analysis. Open‐loop responses are presented for the dehydration of secbutanol with disecbutylether in single‐stage, 12‐tray, and 33‐tray separators. These simulation results for the 33‐tray tower are in qualitative agreement with experimental measurements for the ARCO SBA‐II tower.

Original languageEnglish (US)
Pages (from-to)1229-1242
Number of pages14
JournalAIChE Journal
Issue number8
StatePublished - Aug 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • General Chemical Engineering


Dive into the research topics of 'Dynamic analysis of heterogeneous azeotropic distillation'. Together they form a unique fingerprint.

Cite this