Model Discrimination for Multicomponent Distillation – A Geometrical Approach for Total Reflux. Issue 7 (9th June 2020)

• Record Type: Journal Article
• Authors: Waltermann, Thomas; Schlueter, Stefan; Benfer, Regina; Knoesche, Carsten; Górak, Andrzej; Skiborowski, Mirko
• Other Names: Zeck Sebastian guestEditor.; Bart Hans‐Jörg guestEditor.
• Is Part Of: Chemie Ingenieur Technik. Volume 92:Issue 7(2020)
• Page Start: 890
• Page End: 906
• Publication Date: 2020-06-09
• Subjects: Distillation -- Equilibrium stage model -- Model discrimination -- Rate‐based model; Chemical engineering -- Patents -- Periodicals; Chemical engineering -- Periodicals; Chemical industry -- Periodicals; Chemistry, Technical -- Periodicals; 660.05
• DOI: 10.1002/cite.202000026
• Languages: English
• ISSNs: 0009-286X

Abstract

Abstract: While rate‐based models are available in commercial flowsheet simulation tools, packed distillation columns are still mostly designed based on the equilibrium stage model in combination with HETP values. In order to discriminate between both types of models in a simple way, this article proposes an algorithmic test, based on a geometric criterion for total reflux operation. Substantial differences are illustrated especially for wide‐boiling mixtures, while component‐specific mass transfer rates either increase or reduce the deviation. The derived results are validated by dedicated experiments. Abstract : The standard design approach for packed distillation columns is based on the equilibrium stage model combined with specific HETP values. In some cases, the application of the physically more profound rate‐based model may be required. Since no reliable decision methods for choosing the appropriate model are available, an efficient approach for model discrimination at total reflux based on the model's composition trajectories is proposed.