Time Problem - Close Boiling Mixture

Example 1 Minimum Time Problem - Close Boiling Mixture 

the separation of Heptane is considered from a feed mixture of Heptane-Toluene using Phenol as the solvent. The objective is to recover 75% of the Heptane 

Therefore, the optimisation problem OP2 is considered. The input data are given in Table 10.1. Vapour liquid equilibrium is calculated using NRTL-3 model (Lang et al., 1994). 

The amount of solvent (F, kmol) charged in the reboiler is varied and the amount of feed (Bo, kmol) is adjusted to have the reboiler charged to its maximum 

Note that the path constraint does not appear in the optimisation problem for batch mode solvent feeding. 

---