Abstract
The optimum conditions of bubble column would be the ones that enhance mass transfer and this is accomplished by maximizing gas-liquid interfacial area. In the present work the effect of electrolyte concentration (aqueous solution of sodium chloride NaCl 0.005-0.015 gm/cm3) on bubble size, gas-liquid interfacial area and gas holdup at various superficial gas velocities (0.35-0.312 m/s)) in bubble column was studied. A series of experiments were also performed for air – distilled water system at various superficial gas velocities. The results for the two systems were compared and show a significant difference on gas-liquid interfacial area, bubble size and gas holdup. Digital camera for bubble size measurements was used and the fractional gas holdup was estimated using bed expansion. Correlation based on dimensionless groups for the prediction of bubble size, gas- liquid interfacial area and gas holdup is suggested. An agreement with available data was found
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