Steady state control of perforated plate extractive reactors
- O. Ghallab, R. S. Ettouney, and M. A. El-Rifai
Chemical Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt
Abstract
Model based supervisory control of a class of extractive reactors subject to both measurable and un-measurable disturbances is addressed in the light of a previously developed steady state model. The model reflects the interaction between column hydrodynamics and the rates of mass transfer and chemical reaction. The control scheme is intended to keep a specified product composition despite feed flow rate and feed composition disturbances and to ensure that the column remains within its stable hydrodynamic range. A simple logic control function selects either the solvent rate or the feed rate as the manipulated variable. In order to cope with deviations of the system physicochemical parameters from their nominal values, model based solvent or feed flow rate set point computations are corrected through an iterative scheme.
Steady state control of perforated plate extractive reactors