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- Title
Single- and multi-objective optimisation of hybrid distillation-pervaporation and dividing wall column structures.
- Authors
Chia, Dian Ning; Duanmu, Fanyi; Sorensen, Eva
- Abstract
The separation of azeotropic mixtures is often energy intensive, thus process intensification (PI) becomes an attractive route to enhance energy efficiency. Two of the most commonly used separation intensifications are dividing wall columns and hybrid distillation-membrane processes. In this work, three typical hybrid distillation structures, distillation followed by pervaporation (D-P), pervaporation followed by distillation (P-D), and distillation followed by pervaporation then by distillation (D-P-D), are considered and compared with a hybrid dividing wall column (H-DWC) structure, which is a highly integrated process combining a dividing wall column and a pervaporation membrane network. The four structures are compared by both single-objective and multi-objective optimisation. It is shown that the D-P-D and H-DWC structures require significantly lower total annualized costs than the other two designs due to requiring smaller membrane area, as these two structures use the membrane only to help the mixture composition cross the azeotropic point. [Display omitted] • Method for optimisation of hybrid distillation-pervaporation processes. • Design and optimisation of hybrid dividing wall column (H-DWC). • Assessment of performance based on single- and multi-objective optimisation.
- Subjects
PERVAPORATION; COLUMNS; SEPARATION (Technology); AUTHENTIC assessment; DISTILLATION; ENERGY consumption
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2023, Vol 194, p280
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2023.04.041