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Measuring Volumetric Phase Fractions in a Gas‐Solid‐Liquid Stirred Tank Reactor Using an Impedance Probe
Author(s) -
Brunazzi Elisabetta,
Festa Umberto Di,
Galletti Chiara,
Merello Cesare,
Paglianti Alessandro,
Pintus Sandro
Publication year - 2002
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.5450800407
Subject(s) - electrical impedance , calibration , capacitance , conductance , materials science , phase (matter) , analytical chemistry (journal) , liquid phase , system of measurement , three phase , mechanics , nuclear engineering , acoustics , thermodynamics , chemistry , chromatography , electrical engineering , electrode , engineering , physics , organic chemistry , quantum mechanics , condensed matter physics , astronomy , voltage
A probe based on the measurement of the electrical impedance has been developed to determine the phase hold‐ups in gas‐solid‐liquid stirred tank reactors. The idea was to take advantage of the complex nature of electrical impedance to derive two independent data (conductance and capacitance) from one measurement. Particular attention has been paid to the calibration of the probe and two semi‐empirical equations have been given to relate measurement to hold‐ups. Subsequently, experiments were performed on three‐phase and two‐phase (gas‐liquid and solid‐liquid) systems and the results have been critically analysed.