A Frequency Domain Based Dynamic Simulation Package for Continuous Distillation Units

A digital simulation package for dynamic simulation of continuous distillation units. in the frequency domain, is presented. The package is based on a rigorous dynamic model that can account for all dynamic phenomena known to be important for control studies. Two industrial scale problems are taken up to demonstrate the developed software: a fictitious but representative 64 tray deisobutanizer and an actual 91 tray ethane-ethylene splitter. Simulation results reveal the power of the package in computing a wide variety of frequency responses with sufficient accuracy.