Design of Dividing-Wall Columns by Mixed-Integer Nonlinear Programming Optimization

Meik B. Franke*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)


Dividing-wall columns (DWCs) offer an interesting alternative to conventional distillation towers. Savings of up to 30 % in both energy and capital cost are reported. While these high savings are realistic in some applications, DWCs offer less or no advantage at all in other applications. In any case, it is important to make a fair comparison between the conventional system and the DWC based on an optimized process design. Mixed-integer nonlinear programming (MINLP), especially the presented modified Generalized Benders Decomposition approach, could be the tool to make this comparison, as shown here.

Original languageEnglish
Pages (from-to)582-597
Number of pages16
Issue number5
Publication statusPublished - May 2017
Externally publishedYes


  • Dividing-wall column
  • Ethanol dehydration
  • Extractive distillation
  • Heterogeneous azeotropic distillation


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