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Model Discrimination for Multicomponent Distillation – A Geometrical Approach for Total Reflux |
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| Authors: | Thomas Waltermann Stefan Schlueter Regina Benfer Carsten Knoesche Andrzej Górak Mirko Skiborowski |
| Affiliation: | 1. TU Dortmund University, Department of Biochemical and Chemical Engineering, Laboratory of Fluid Separations, Emil-Figge-Straße 70, 44227 Dortmund, Germany;2. BASF SE, GCP/TA – L540, 67056 Ludwigshafen am Rhein, Germany;3. TU Dortmund University, Department of Biochemical and Chemical Engineering, Laboratory of Fluid Separations, Emil-Figge-Straße 70, 44227 Dortmund, Germany
Lodz University of Technology, Faculty of Process and Environmental Engineering, Department of Environmental Engineering, Wólczañska 213,, 90-924 Lódz, Poland |
| 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. |
| Keywords: | Distillation Equilibrium stage model Model discrimination Rate-based model |