The Simulation Testing of Analytically-Derived, Steady-State and Transfer-Function Models for CSTC Binary Distillation Columns

Parametric steady-state and transfer-functions models, analytically-derived for separation occurring within a packed CSTC distillation column reported in ACSE RR573, 1995 are here validated by comprehensive time domain simulation. Both large-signal steady-state and small signal dynamic responses are found to be in complete accord with the analytical predictions under both open and linear, closed-loop control conditions. Differences in large signal behaviour are demonstrated and are explained in terms of the non-linear reversing gain characteristic of the process here derived. The work is undertaken and reported as essential preliminaries to using the models for future behavioural prediction, in particular, under the On Line Riccati Control strategy of Banks {2}.