CFD-Mass transfer Simulation of an RDC Column

A combined computational fluid dynamics (CFD), population balance modeling (PBM) and mass transfer code is used to simulate a rotating disc contactor pilot plant column. Droplet breakage and coalescence is accounted by a one group model and literature models for the breakage frequency, coalescence propability and efficiency. Mass transfer is described based on the two-film theory. The simulation results as droplet size, hold-up and concentration profile along the column height are compared to experimental data. The simulated droplet size shows a slight increase underneath the first compartment whereas it is in good agreement to experimental data in the active height of the column. Also the solute concentrations profiles could be good represented by the simulations.