EXPERIMENTAL VALIDATION OF MODEL-BASED CONTROL STRATEGIES FOR MULTICOMPONENT AZEOTROPIC DISTILLATION

Abstract This work presents the results from dynamic modeling and control of an azeotropic distillation system. The model was validated with experimental data from a packed distillation unit. The physically-based process dynamic model, developed in HYSYS, was linked online with the control software used in the process. Model parameters were modified online using a feedback configuration to eliminate the difference between the process and model outputs. The fundamental model was used in the implementation of different control strategies, including a multivariable control strategy using model predictive control (MPC) software Predict Pro, via an inferential control strategy to treat missing process measurements.

[1]  Esteban A. Brignole,et al.  Modelling and control of an industrial azeotropic train , 1997 .

[2]  Wolfgang Marquardt,et al.  Experimental Verification of Multiple Steady States in Heterogeneous Azeotropic Distillation , 1997 .

[3]  Günter Wozny,et al.  A nonequilibrium model for three-phase distillation in a packed column: Modelling and experiments , 2003 .

[4]  N. Bekiaris.  Multiple Steady States in Distillation , 1995 .

[5]  S. Joe Qin,et al.  A survey of industrial model predictive control technology , 2003 .

[6]  M. Morari,et al.  Multiple steady states in heterogeneous azeotropic distillation , 1993 .

[7]  Thomas F. Edgar,et al.  Process Dynamics and Control , 1989 .

[8]  David Shan-Hill Wong,et al.  Experimental investigation of conventional control strategies for a heterogeneous azeotropic distillation column , 2000 .

[9]  M. Morari,et al.  Multiple Steady States in Homogeneous Azeotropic Distillation , 1993, 1993 American Control Conference.

[10]  R. Krishna,et al.  Crossing of boundaries in ternary azeotropic distillation: influence of interphase mass transfer , 2001 .

[11]  Influence of Mass Transfer in Distillation of Mixtures with a Distillation Boundary , 1999 .

[12]  Paul A. Taylor,et al.  Modelling and dynamics of an extractive distillation column , 1984 .

[13]  Michael F. Doherty,et al.  Design and synthesis of homogeneous azeotropic distillations. 3. The sequencing of columns for azeotropic and extractive distillations , 1985 .

[14]  David Shan-Hill Wong,et al.  Critical reflux, parametric sensitivity, and hysteresis in azeotropic distillation of isopropyl alcohol + water + cyclohexane , 1998 .