Control of propylene - propane distillation process using Unisim® design

The paper addresses the control problem of a binary distillation processes. There are analyzed the quality specifications of separated products and also the distributed and multivariable character of the process. The robustness of the control system lies in its simplicity versus the investment. The paper presents the studies made for development and numerical testing of three types of control structures for propylene-propane separation process: the feedback control structure, the feedforward control structure and the optimal control structure.