Volume 40, Issue 5 pp. 829-837
Research Article

Detection of Microscale Mass-Transport Regimes in Supercritical Fluid Extraction

Arthur A. Salamatin

Corresponding Author

Arthur A. Salamatin

Kazan Federal University, Department of Aerohydromechanics, Kremlyovskaya Str. 18, 420008 Kazan, Russia

Correspondence: Arthur A. Salamatin ([email protected]), Kazan Federal University, Department of Aerohydromechanics, Kremlyovskaya Str. 18, Kazan, 420008, Russia.Search for more papers by this author
First published: 20 January 2017
Citations: 11

Abstract

The problem of detecting supercritical fluid extraction regimes on the particle-scale level is discussed by using a generalized multiparameter model, which includes the shrinking-core (SC) and broken-and-intact-cells (BIC) approaches as its limiting cases. The model accounts for two internal mass-transfer resistances attributed to cell membranes and transport channels. A wide spectrum of particle-scale extraction regimes, described by the model, agree with available up-to-date relatively short laboratory experiments. Simplified concepts (like SC or BIC) could only be used for available experimental data correlation, and do not allow a reliable extension to long process times. The experimental methodology was suggested to detect limiting internal mass-transfer mechanisms.

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