Liquid-phase tracer responses in a cold-flow counter-current trayed bubble column from conductivity probe measurements

M. H. Al-Dahhan, P. L. Mills, P. Gupta, L. Han, M. P. Dudukovic, T. M. Leib, J. J. Lerou

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4 Scopus citations


Liquid-phase mixing in a cold-flow counter-current-flow bubble column reactor with trays has been evaluated. A developed filtering technique [P. Gupta, M.H. Al-Dahhan, M.P. Dudukovic', P.L. Mills, A novel signal filtering methodology for obtaining liquid-phase tracer responses from conductivity probes, Flow Meas. Instrum. 11 (2) (2000) 123-131.] was used to extract the liquid-phase concentration responses from the conductivity probe data in two phase gas-liquid flow with systematic corruption. Conductivity probe responses to a pulse input of KCl liquid tracer were measured at various point-wise locations in an 8 in. diameter clear acrylic column using air and water as the gas-liquid system. The superficial gas and liquid velocities were selected to span those encountered in a commercial unit using a pipe-type gas sparger with a number of laterals. Results from tracer experiments are presented along with a cross-correlation of signals to estimate the characteristic residence time of the liquid on a tray. The utility of the filtering algorithm for a broader range of gas-liquid flows is also discussed.

Original languageEnglish (US)
Pages (from-to)945-953
Number of pages9
JournalChemical Engineering and Processing: Process Intensification
Issue number11
StatePublished - Nov 2006

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering


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