Abstract
The influence of the various relevant process and design variables on the interfacial area in agitated gas-liquid contactors is discussed. An optimum agitator to vessel diameter ratio ( D/ T) opt exists where the total interfacial area is a maximum for a chosen power input into the liquid. The determination of ( D/ T) opt and corresponding values of power input, agitation rate and shaft rotation speed is demonstrated. As a general rule it can be said that high speed, small diameter impellers have to be used for an efficient use of power. Furthermore it is shown that agitator power input or agitator Reynolds number are not adequate variables for correlating interfacial areas. Recommendations are given for the design of agitated gas-liquid contactors.
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