In a distillation operation, what is the effect of the temperature of the reflux stream (given below) on the condenser and reboiler loads? Reflux conditions: (i) Reflux stream is completely liquid and is at its bubble point. (ii) Reflux stream is below its bubble point ?

Question

Accepted Answer

Both condenser and reboiler loads are higher in case (ii) as compared to case (i). When the reflux stream is below its bubble point (case ii), more energy is needed to vaporize it in the reboiler and condense it in the condenser compared to when it's at its bubble point (case i).