Application of multivariable generalized predictive control to a packed distillation column

The present work deals with the application of Multivariable Generalized Pr edictive Control (MGPC) systems to a packed distillation column. The steady -state and dynamic behaviour of the system have been simulated using two fi lm plug flow model. The model solutions have been obtained employing orthog onal collocation on finite element. The Jacobi polynomials within the finit e element procedure was tested to determine the phase how rates, the liquid and vapour composition profiles and the temperature profiles. All the theo retical results were compared with experimental data obtained from a pilot- plant packed distillation column distilling methanol-water mixture. Decoupl ing and MGPC control of overhead and/or bottom compositions were examined. Perturbation in feed composition and, reflux ratio and the reboiler heat du ty were utilized as the disturbance and the manipulated variables respectiv ely. Performance of these systems was tested by using an integral square of error (ISE and IAE) criterion.