Summary: Computers and Chemical Engineering 30 (2005) 147157
Development and application of linear process model in
estimation and control of reactive distillation
Moshood J. Olanrewaju, Muhammad A. Al-Arfaj
Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
Received 29 September 2004; received in revised form 14 August 2005; accepted 18 August 2005
Available online 6 October 2005
This paper presents a comprehensive formulation of a linearized state space process model for a generic two-reactant-two-product reactive
distillation system. The development of the model requires the knowledge of the desired steady state design data, including liquid holdups and
composition profiles. The application of the developed linear process model in composition estimation and control of the system is demonstrated.
The effect of controller tuning on the performance of the estimator-based control system is explored. It is shown that effective controller tuning is
necessary for a robust performance of a closed-loop reactive distillation system that relies on a state estimator. A robust linear state estimator can
be developed and implemented in a feedback control system of a reactive distillation when the process can be approximated by a linear model.
© 2005 Elsevier Ltd. All rights reserved.
Keywords: Reactive distillation; Linear state space model; State estimation and control
The growing application of reactive distillation processes has
necessitated a better understanding of its process dynamics and
control. The classical problem of implementing a feedback con-