Modelling of extractive heterogeneous-azeotropic distillation in dividing wall column

Andras Jozsef Toth, Daniel Fozer, T. Nagy, E. Haaz, J. Nagy, P. Mizsey

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The distillation based separation can be extremely complex if highly non-ideal mixtures are to be separated. In spite of different successfully applied unit operations there is always a possible way to improve the distillation technique and widen its toolbar. A novel improvement in this area is the development of the extractive heterogeneous-azeotropic distillation (EHAD). For the sake of the demonstration of the efficient use of EHAD in Dividing wall columns (DWC), two quaternary mixtures are selected for separation: Water – Ethanol – Ethyl acetate – Acetone and Water – Ethanol – Ethyl acetate – Ethylene glycol. There are real waste mixtures from pharmaceutical industry. It must be mentioned, extractive heterogeneous-azeotropic distillation method has never been investigated in dividing wall columns. Conventional distillation column sequences and dividing wall columns are selected for comparison. Rigorous steady-state simulations are carried out using ChemCAD flowsheet simulation software. Number of trays, heat duties and Total Annual Cost (TAC) of the systems are optimized. It can be concluded, the application of the EHAD in DWCs allows also the simplification of the separation schemes and the separation reduces the energy requirements of the distillation and opens new horizons for the separation of non-ideal mixtures saving energy, money and natural resources. Using DWCs the reboiler duties can be reduced with 20% and the appropriate separation can be reached with one less column.

Original languageEnglish
Title of host publicationComputer Aided Chemical Engineering
PublisherElsevier B.V.
Pages235-240
Number of pages6
DOIs
Publication statusPublished - Jan 1 2019

Publication series

NameComputer Aided Chemical Engineering
Volume46
ISSN (Print)1570-7946

Fingerprint

Distillation columns
Distillation
Ethanol
Reboilers
Flowcharting
Ethylene Glycol
Water
Natural resources
Acetone
Ethylene glycol
Drug products
Energy conservation
Demonstrations
Pharmaceutical Preparations
Costs
Industry

Keywords

  • dividing wall column
  • extractive heterogeneous-azeotropic distillation
  • flowsheet simulator
  • non-ideal mixtures

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Computer Science Applications

Cite this

Toth, A. J., Fozer, D., Nagy, T., Haaz, E., Nagy, J., & Mizsey, P. (2019). Modelling of extractive heterogeneous-azeotropic distillation in dividing wall column. In Computer Aided Chemical Engineering (pp. 235-240). (Computer Aided Chemical Engineering; Vol. 46). Elsevier B.V.. https://doi.org/10.1016/B978-0-12-818634-3.50040-0

Modelling of extractive heterogeneous-azeotropic distillation in dividing wall column. / Toth, Andras Jozsef; Fozer, Daniel; Nagy, T.; Haaz, E.; Nagy, J.; Mizsey, P.

Computer Aided Chemical Engineering. Elsevier B.V., 2019. p. 235-240 (Computer Aided Chemical Engineering; Vol. 46).

Research output: Chapter in Book/Report/Conference proceedingChapter

Toth, AJ, Fozer, D, Nagy, T, Haaz, E, Nagy, J & Mizsey, P 2019, Modelling of extractive heterogeneous-azeotropic distillation in dividing wall column. in Computer Aided Chemical Engineering. Computer Aided Chemical Engineering, vol. 46, Elsevier B.V., pp. 235-240. https://doi.org/10.1016/B978-0-12-818634-3.50040-0
Toth AJ, Fozer D, Nagy T, Haaz E, Nagy J, Mizsey P. Modelling of extractive heterogeneous-azeotropic distillation in dividing wall column. In Computer Aided Chemical Engineering. Elsevier B.V. 2019. p. 235-240. (Computer Aided Chemical Engineering). https://doi.org/10.1016/B978-0-12-818634-3.50040-0
Toth, Andras Jozsef ; Fozer, Daniel ; Nagy, T. ; Haaz, E. ; Nagy, J. ; Mizsey, P. / Modelling of extractive heterogeneous-azeotropic distillation in dividing wall column. Computer Aided Chemical Engineering. Elsevier B.V., 2019. pp. 235-240 (Computer Aided Chemical Engineering).
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