Optimization of Batch Extractive Distillation with Off-cut Recycle and Varying Feed Composition

Laszlo Hegely, P. Láng

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

The recovery of methanol from an industrial waste solvent mixture (acetone (A) – methanol (B) – THF (C) –water (D) – toluene (E)) by batch (BD) and batch extractive distillation (BED) is optimised. A production cycle consists of six consecutive batches. The 1st fore-cut is incinerated; 2nd fore-cut, after-cut and hold-up are recycled to the next batch. Both processes are studied for constant and varying fresh feed compositions. The optimization of the batches was performed consecutively by a genetic algorithm (GA) with a professional flow-sheet simulator for the dynamic simulation. Objective function is the profit of the actual batch. Optimization variables are reflux ratios of all steps, duration of fore-cut withdrawals and for the BED flow rate and duration of entrainer (water) feeding. The effects of the variation of fresh feed composition on the optimal values of parameters are studied. The results of BD and BED processes are compared.

Original languageEnglish
Title of host publication26 European Symposium on Computer Aided Process Engineering, 2016
PublisherElsevier B.V.
Pages1677-1682
Number of pages6
Volume38
ISBN (Print)9780444634283
DOIs
Publication statusPublished - 2016

Publication series

NameComputer Aided Chemical Engineering
Volume38
ISSN (Print)15707946

Keywords

  • batch extractive distillation
  • genetic algorithm
  • off-cut recycle
  • optimization

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Computer Science Applications

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  • Cite this

    Hegely, L., & Láng, P. (2016). Optimization of Batch Extractive Distillation with Off-cut Recycle and Varying Feed Composition. In 26 European Symposium on Computer Aided Process Engineering, 2016 (Vol. 38, pp. 1677-1682). (Computer Aided Chemical Engineering; Vol. 38). Elsevier B.V.. https://doi.org/10.1016/B978-0-444-63428-3.50284-8