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Shortcut method for the design of extraction columns for multi-component mixture separations
Publikationstyp
Conference Paper
Date Issued
2013-06
Sprache
English
TORE-URI
First published in
Number in series
32
Start Page
1039
End Page
1044
Citation
Computer Aided Chemical Engineering 32: 1039-1044 (2013)
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
Elsevier
ISBN
978-0-444-63234-0
Shortcut methods are valuable tools for the fast evaluation of different units and flowsheets in separation process design. In this paper, a systematic method for the estimation of the minimum solvent flow rate required in counter-current extraction columns is presented. A key element is the identification of a mode of operation under saddle-pinch control, characterizing multi-component extractive separations. The criterion defining this mode leads to a new shortcut method, which provides both, a systematic calculation of all pinch points and a criterion for minimum solvent flow rate estimation. It requires low computational effort, it is robust and does not need any specific initialization. Furthermore, the shortcut method is fully algorithmic and thus, at least in principle, applicable to any number of components. Its features are highlighted by means of an example of an extractive separation of a four component mixture.
Subjects
Extraction
Feed angle method
Saddle pinch control
Shortcut
DDC Class
600: Technology