Effect of L/D Ratio on Phase Holdup and Bubble Dynamics in Slurry Bubble Column using Optical Fiber Probe Measurements


In this investigation, time average local gas holdup and bubble dynamic data were achieved for three L/D ratios of slurry bubble column. The examined ratios were 3, 4 and 5 in 18" diameter slurry bubble column. Air-water-glass bead system was used with superficial gas velocity up to 0.24 m/s. The gas holdup was measured using four tips optical fiber probe technique. The results showed that the gas holdup increases almost linearly with the superficial gas velocity in 0.08 m/s and levels off with a further increase of velocity. A comparison of the present data with those reported for other slurry bubble column having diameters greater than 18" and L/D higher than 5 was made. The results indicated a little effect of diameter on the gas holdup. A local, section-averaged gas holdup increases with increasing superficial gas velocity, while the effect of solid loading are less significant than that of the superficial gas velocity. Chaos analysis was used to analyze the slurry system.


Chemical and Biochemical Engineering

Keywords and Phrases

Air; Gases; Optical Fibers; Probes; Velocity; Bubble Dynamics; Chaos Analysis; Gas Hold Up; Optical Fiber Probe; Slurry Bubble Column; Slurry System; Solid Loading; Superficial Gas Velocities; Bubble Columns; Gas Holdups; Optical Fiber Probe

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Article - Journal

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© 2016 De Gruyter, All rights reserved.

Publication Date

01 Apr 2016