Abstract
The gas-liquid interfacial area in a dispersed gas injection system was estimated by a chemical method and measured directly by an electroresistivity probe method. In the chemical method, the gas-liquid interfacial area was obtained by plotting CO2 absorption rate in 0.1 mol/L KOH solution based on the gas absorption theory. In the electroresistivity probe method, local gas holdup, bubble rising velocity, and local bubble diameter were measured in the same solution into which air was injected upwardly. Overall mean values of gas holdup and bubble diameter in the vessel were obtained by means of statistical treatments. The specific interfacial area was calculated from these data. Measurements were done in a cylindrical water vessel under different conditions of gas flow rate and nozzle diameter. The measured values of the specific interfacial area by the electroresistivity probe method were compared with those by the chemical method and showed good agreement.
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