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 5 and the Damköhler number, defined by , is 100.

This Demonstration shows the distillate and bottom compositions versus time for components , , , and (in blue, magenta, brown, and green, respectively) when the column is subject to a step in the reflux ratio at min. The distillate and bottom flow rates are equal because the reboil ratio, , and the reflux ratio, , are chosen so that .

You can select the magnitude of the step in the reflux ratio by setting the value of parameter defined by for min and for min.