New double column system for heteroazeotropic batch distillation

F. Denes, P. Lang, G. Modla, X. Joulia

Research output: Contribution to journalArticle

18 Citations (Scopus)


A new double column system (DCS) operated in closed mode is suggested for heterogeneous batch distillation. This configuration is investigated by feasibility studies based on the assumption of maximal separation and is compared with the traditional batch rectifier (BR). We study the configurations also by dynamic simulation based on a detailed model using a professional simulator. For the new configuration the minimal duration of the process is determined. The influence of the most important operational parameters is studied. The calculations and the simulations are performed for a binary (n-butanol-water) and for a ternary heteroazeotropic mixture (isopropanol-water + benzene as entrainer). One of the advantages of the DCS is that distillation of binary and ternary systems is performed in only one step. Furthermore the recovery of components is usually higher and the amount of byproducts is lower.

Original languageEnglish
Pages (from-to)1631-1643
Number of pages13
JournalComputers and Chemical Engineering
Issue number10
Publication statusPublished - Oct 14 2009


  • Batch distillation
  • Double column
  • Dynamic simulation
  • Feasibility study
  • Heteroazeotrope

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Computer Science Applications

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