Estimation of gas hold-up in aerated vessels

An attempt to produce a simple equation for gas hold-up in stirred tank rea ctors has been made. This new semi-empirical equation, based on the mass ba lance for the gas phase, predicts the observed effects due to the tank and impeller diameters and physical properties reasonably well. It can be used both for ranks working with a single Rushton impeller as well as with multi ple Rushton impeller systems. The equation has been validated using both da ta found in literature and from our experiments.