W. Marquardt et M. Amrhein, DEVELOPMENT OF A LINEAR DISTILLATION MODEL FROM DESIGN-DATA FOR PROCESS-CONTROL, Computers & chemical engineering, 18, 1994, pp. 190000349-190000353
A novel approach to approximate modeling for multivariable controller
design of binary distillation columns is suggested. The modeling idea
draws on the wave propagation phenomena characterizing distillation co
lumn dynamics. The development of the model only requires knowledge ab
out steady-state design data, including holdups and stationary concent
ration profiles. No dynamic simulation is required to determine the mo
del parameters. Typically, a fifth-order linear model is obtained. Com
parison of the deduced linear approximate model with the rigorous mode
l shows an excellent average match of the process nonlinearities.