Modeling Drainage in Periodic Separation

Jens Abildskov*, Sten Bay Jørgensen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Simple models are developed for realistic operation modes of periodic separation. The models comprise instantaneous, simultaneous, and sequential draining. Using our models, the influence of a finite drainage time on separation performance is investigated. Linear case systems are modeled for stationary profiles for both simultaneous and sequential liquid drainage. Performance measures, such as tray efficiencies and mass transfer, are compared for different cases using a consistent modeling framework. We find that draining periods – in general – should be minimized, irrespective of the operating mode. For columns with a few stages, the simultaneous draining is most efficient. With a few stages, the differences are negligible. For higher numbers of stages, the sequential draining becomes superior, partially due to the enabling of mass transfer during draining. Two detailed study cases are provided.
Original languageEnglish
JournalIndustrial and Engineering Chemistry Research
Issue number26
Pages (from-to)9405–9421
Publication statusPublished - 2022


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