Design and control of pressure‐swing distillation for separating ternary systems with three binary minimum azeotropes

Ao Yang, Weifang Shen, Shun an Wei, Lichun Dong, Jie Li, Vincent Gerbaud

Research output: Contribution to journalArticlepeer-review

539 Downloads (Pure)

Abstract

The separation of ternary non-ideal systems with multi-azeotrope is very important since they are often found in the waste of chemical and pharmaceutical industries, which is much more difficult due to the formation of multi- azeotrope and distillation boundary. We propose a systematic procedure for design and control of a triple-column pressure-swing distillation for separating ternary systems with three binary minimum azeotropes. In the procedure involves thermodynamic insights, a two-step optimization method, and effective control strategy. The separation of tetrahydrofuran/ethanol/water is used to illustrate the capability of the proposed procedure. It is found that the pressure limits in columns can be determined through the analysis of residue curve maps, distillation boundary, and isovolatility curves. The optimal triple-column pressure-swing distillation is generated with the minimum total annual cost of 2.181×106 $ in sequence A. The operating conditions are well controlled approaching their desired specifications in an acceptable time when disturbances occur.
Original languageEnglish
JournalAI Ch E Journal
Early online date12 Jan 2019
DOIs
Publication statusPublished - 2019

Keywords

  • triple-column pressure-swing distillation
  • ternary system
  • residue curve maps
  • optimization
  • temperature difference control strategy

Fingerprint

Dive into the research topics of 'Design and control of pressure‐swing distillation for separating ternary systems with three binary minimum azeotropes'. Together they form a unique fingerprint.

Cite this