The molar hold-up of the condenser and reboiler are set equal to 2000 and 5000 kmol, respectively. The hold-up in the reactive and nonreactive trays is chosen equal to 200 kmol. The reaction rate constant is equal to 5 and the Damköhler number defined by is set to 100.

This Demonstration shows how one can select the distillate composition of component using a simple proportional-integral controller. The distillate and bottom flow rates are equal because the reboil ratio, , and the reflux ratio, , are chosen so that . In addition to the composition profile of the products (bottom and distillate) versus time, the Demonstration provides the reflux rate policy. The reflux rate is chosen so that it is at least equal to 0.2.