Measurement of gas holdups and sauter mean bubble diameters in bubble column reactors by dynamics gas disengagement method

J. G. Daly, S. A. Patel, D. B. Bukur

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In the present study pressure transducer signals were used to measure the rate of liquid level drop during the bubble disengagement process. This enables one to use the dynamic gas disengagement method in opaque systems (i.e. industrial reactors operating at high pressures, and/or temperature) and has some advantages in comparison to analysis based on visual observations of the expanded height during large bubble disengagement. Methodology for analyzing raw data and obtaining bubble size distribution (i.e. Sauter mean bubble diameter) is described. The theory is illustrated with data obtained in bubble columns 0.05 and 0.21 m in diameter and 3 m tall in a molten wax - nitrogen system at 265°C and atmospheric pressure for superficial gas velocities up to 0.12 m/s. Results obtained from analysis of data from pressure transducers, were found to be in excellent agreement with those obtained previously from visual observations of the dispersion during the disengagement process (Patel ., 1990).

Original languageEnglish
Pages (from-to)3647-3654
Number of pages8
JournalChemical Engineering Science
Issue number13-14
Publication statusPublished - 1992
Externally publishedYes



  • bubble column reactor
  • dynamic disengagement
  • Fischer-Tropsch synthesis
  • gas holdup
  • gas-liquid interfacial area

ASJC Scopus subject areas

  • Chemical Engineering(all)

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