Optimisation of a batch extractive distillation process with off-cut recycle

Laszlo Hegely, P. Láng

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

The recovery of methanol from an industrial waste solvent mixture (acetone (A) - methanol (B) - THF (C)-water (D) - toluene (E)) by a batch (BD) and batch extractive distillation (BED) process was simulated and optimised. For both processes a production cycle consists of six consecutive batches. The first forecut is incinerated; the second fore-cut, the after-cut and the hold-up are recycled to the next batch in order to decrease the loss of methanol. The optimization of both processes was performed by a genetic algorithm (GA) coupled with a professional flow-sheet simulator performing the dynamic simulation. The optimization of the batches was performed consecutively, with the objective function being the profit of the actual batch. The optimization variables were the reflux ratios of the steps (fore-cuts, main cut), duration of fore-cut withdrawals and for the BED the flow rate and duration of entrainer (water) feeding. The effects of the recycling of the off-cuts on the charge composition and on the optimal values of the parameters were studied, and the optimised BD and BED processes were compared.

Original languageEnglish
Title of host publicationChemical Engineering Transactions
PublisherItalian Association of Chemical Engineering - AIDIC
Pages1117-1122
Number of pages6
Volume45
ISBN (Print)9788895608365
DOIs
Publication statusPublished - Oct 1 2015

Publication series

NameChemical Engineering Transactions
Volume45
ISSN (Electronic)22839216

Fingerprint

Distillation
Methanol
Industrial Waste
Water
Industrial wastes
Toluene
Acetone
Recycling
Profitability
Simulators
Genetic algorithms
Flow rate
Recovery
Computer simulation
Chemical analysis

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Hegely, L., & Láng, P. (2015). Optimisation of a batch extractive distillation process with off-cut recycle. In Chemical Engineering Transactions (Vol. 45, pp. 1117-1122). (Chemical Engineering Transactions; Vol. 45). Italian Association of Chemical Engineering - AIDIC. https://doi.org/10.3303/CET1545187

Optimisation of a batch extractive distillation process with off-cut recycle. / Hegely, Laszlo; Láng, P.

Chemical Engineering Transactions. Vol. 45 Italian Association of Chemical Engineering - AIDIC, 2015. p. 1117-1122 (Chemical Engineering Transactions; Vol. 45).

Research output: Chapter in Book/Report/Conference proceedingChapter

Hegely, L & Láng, P 2015, Optimisation of a batch extractive distillation process with off-cut recycle. in Chemical Engineering Transactions. vol. 45, Chemical Engineering Transactions, vol. 45, Italian Association of Chemical Engineering - AIDIC, pp. 1117-1122. https://doi.org/10.3303/CET1545187
Hegely L, Láng P. Optimisation of a batch extractive distillation process with off-cut recycle. In Chemical Engineering Transactions. Vol. 45. Italian Association of Chemical Engineering - AIDIC. 2015. p. 1117-1122. (Chemical Engineering Transactions). https://doi.org/10.3303/CET1545187
Hegely, Laszlo ; Láng, P. / Optimisation of a batch extractive distillation process with off-cut recycle. Chemical Engineering Transactions. Vol. 45 Italian Association of Chemical Engineering - AIDIC, 2015. pp. 1117-1122 (Chemical Engineering Transactions).
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