Simulation model considering of liquid phase mass transfer resistance in heterogeneous distillation

A simulation model for heterogeneous distillation proposed by Saito dal. (1 998)is modified by taking account of mass transfer resistance in the aqueou s and organic liquid phases. In the present model, the heat and mass transf er rates between the vapor and each liquid are calculated separately, The s imulation results are compared with the experimental data obtained previous ly by a wetted-wall column for an ethanol-benzene-water system. The predict ed reflux flow rate is improved compared with the previous simulation model where mass transfer resistance in the liquid phase is ignored, and the pre diction accuracy is less than 10% of the observed values.