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Axial Backmixing and Residence Time Distribution in a Miniaturized, Stirred‐Pulsed Extraction Column
Author(s) -
Soboll Sebastian,
Bittorf Lukas,
Kockmann Norbert
Publication year - 2018
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201700152
Subject(s) - residence time distribution , mass transfer , conductivity , chemistry , analytical chemistry (journal) , extraction (chemistry) , electrode , chromatography , flow (mathematics) , continuous phase modulation , residence time (fluid dynamics) , materials science , mechanics , electronic engineering , engineering , physics , geotechnical engineering
Axial backmixing is an important issue in extraction columns since it heavily affects the mass transfer performance. A miniaturized, stirred‐pulsed column was investigated regarding its backmixing characteristics in the continuous phase, using the system water/ n ‐butyl acetate. Residence time distributions were determined through pulse experiments with potassium chloride, which was detected via electrical conductivity. To perform the conductivity measurement without distortion of the two‐phase flow, electrodes with an annular design that precisely line up with the inner column wall were manufactured. This design is a promising alternative for use in small‐scale tubular devices where commercial electrodes do not fit and in applications where interference with the flow must be avoided.