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Evaluation et comparaison des parameters de la dispersion axiale dans les deux phases d'une colonne extraction à plateaux alternatifs
Author(s) -
Bensalem A.,
Steiner L.,
Hartland S.
Publication year - 1982
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450600504
Subject(s) - reciprocating motion , physics , thermodynamics , gas compressor
The impulse response technique for the injection of a tracer has been applied to both liquid phases in a pilot plant sized reciprocating plate extraction column of the type introduced by Karr. The responses obtained have been interpreted using the piston flow model, and employing three analysis techniques to determine the Péclet number, Pe, and the residence time, π, namely the moments method, the least‐squares method in the time and frequency domains and the Vergnes' method. The least‐square method was found to give the most coherent results, even for the dispersed phase, because this method is less sensitive to instrument drift (noise) than the two other methods. The piston flow model successfully described and correlated the longitudinal mixing in the continuous phase, and fairly well for the dispersed phase.