Three-Dimensional Model on Liquid-Liquid Mass Transfer of the Kenics Static Mixer: Considering Dynamic Droplet Size Distribution

The Kenics static mixer is anticipated to replace conventionalextraction apparatuses because of its outstanding mass transfer performancesand economy. The lack of a practicable mass transfer model limitsits wide application. In this study, a three-dimensional liquid-liquidmass transfer model was developed for the Kenics static mixer whileconsidering the dynamic droplet size distribution due to both interphasemass transfer and droplet breakage and coalescence. It has been provento have good accuracy because of the mean relative errors betweensimulated and experimental results within 7%. Different hydrodynamicand mass transfer behaviors were found at different fluid velocities.The patterns thus presented were supported by other publications asan additional proof of the constructed model's accuracy. Itwas also found from the effect analysis on fluid velocity that thestatic mixer, even with few mixing elements (5) and at a low totalinlet fluid velocity (0.7 m/s), can achieve excellent mass transferperformance.