Abstract
The separation of azeotropic mixtures via heterogeneous distillation poses one of the most challenging process control problems. With the help of rigorous dynamic simulations, it has been possible to determine a suitable control strategy which enabled heat integration. First, new steady states for both columns were determined so as to allow operation under revamping conditions. Then, the energy recovery scheme was incorporated and tested. As no integration policy is feasible without proper regulation, the changes in the control policy were ascertained. Finally, the economic benefits were assessed by means of a cash flow analysis.
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