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

✍ Scribed by J.G. Daly; S.A. Patel; D.B. Bukur

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 575 KB
• Volume: 47
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(92)85081-l

✦ Synopsis

In Lhe present study pressure transducer signals were used to measure the rate of liquid level drop during tbe 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 temperatures) 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 waxnitrogen 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 (Pate1 et al.. 1990).