Process control modeling and analysis of a binary packed distillation column

• Main Author: Ilagan, Mary Ann Luz C.
• Format: text
• Language: English
• Published: Animo Repository 1997
• Subjects: Chemical process control; Distillation; Algorithms; Packed towers; Binary control systems; Separation (Technology); x4 Column; Packed; Chemical Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_masteral/1874
• Institution: De La Salle University

Process Control Modeling and Analysis of a Binary Packed Distillation Column using structured packings are studied through this thesis. The simulation of the steady state behavior used a new approach of employing mass and heat fluxes in determining the liquid and vapor compositions and flowrates within the column. This simulation has been extended in determining the behavior of these compositions towards disturbances due to changes in feed rate and composition. The simulation is also capable of determining the range of values of reflux ratio or wall heat flux to return the disturbed column into its steady state values.To introduce process control into the system, the steady state simulation of the packed binary distillation column has been modified to a dynamic simulation. The results from the steady state simulation when disturbance has been applied were similar to the results generated from the dynamic simulation.Finally, control has been applied by testing the dynamic simulation to different control modes. Proportional-Integral and Proportional-Integral-Derivative control modes have been found sufficient in maintaining the desired product to its set point because it returns the distillate composition to its set point when disturbance in feed rate and composition have been applied while keeping the system in its stable condition.