Influence of Counterdiffusion Effects on Mass Transfer Coefficients in Stirred Tank Reactors

Accurate knowledge of volumetric oxygen mass transfer coefficients in multiphase systems is important for successfully designing and efficient operation process plants. As a result, large number papers on the determination kLa have been published literature. The dynamic degassing method probably most common determining coefficient. However, little work known influence countercurrent diffusion effects, arising from further dissolved components, For this reason, effect investigated present by using different stripping gases to determine Furthermore, counterdiffusion both conventional aeration with microbubbles. shows that choice gas has decisive Moreover, it can be shown directly proportional solubility aqueous phase. Simultaneous measurements bubble size distributions allow kL. A model developed describing decrease coefficient as function gas. experimental coefficients, should adapted secondary types occurring within real processes achieving better comparability.