Simulation of a Multicomponent Batch Distillation Column with Total Reflux through the Distillate Receiver

Abstract

A shortcut procedure applicable to a multicomponent distillation in a batch column with a distillate receiver under total reflux condition was developed. It is based on the assumptions of constant molar overflow, constant vapor boilup rate, and constant relative volatilities. The effect of liquid holdup in each stage and condenser is taken into consideration in modeling the dynamic behavior of the batch column. Estimates of the volume of the distillate receiver, changes in compositions in the receiver and still, concentration profiles of the column, and total distillation time required to complete the separation can be made in the proposed model. Illustrative calculations were performed for the separation of a quaternary system for two cases: an initially empty distillate receiver and an initially filled-up distillate receiver.