Dynamic Analysis of Absorption Column

Abstract

The absorption column is one of the essential separation processes in industrial
operation, so the need arises to control absorption column by process simulation and also to
analyze system by method called frequency response using MATLAB8. This work dealt with
gas-liquid (air-water) absorption packed column which is analyzed by bode plot and frequency
response to determine the stability of the system with or without Proportional Controller (P),
Proportional Integral Controller (PI) or Proportional Integral Derivatives Controller (PID).The
frequency response gives the transient response information, by defining such frequency
response quantities as gain margin and phase margin. This work presents dynamic analysis of
absorption column which is single input/single output (SISO) using feedback control (P, PI and
PID) with the parameters of Cohen-Coon, Ziegler Nichols and Internal Model control and
compares between them