WSEAS Transactions on Systems and Control
Print ISSN: 1991-8763, E-ISSN: 2224-2856
Volume 10, 2015
Dynamic Modeling and Improvements in the Tuning of PI Controllers for Fluidized Catalytic Cracking Unit
Authors: , ,
Abstract: The Fluidized Catalytic Cracking Unit is one of the most important dynamic and complex process in a refinery that cracks down longer chain hydrocarbons to yield Gasoline. The process is highly nonlinear and multi variable with severe interactions. The input to the Cracking reactor is a mixture of hydrocarbons that makes the reaction kinetics very complicated due to the involved reactions. The purpose of this study is to develop a detailed dynamic model of a typical FCC unit that consists of the reactor, regenerator, blower and catalyst transfer lines and to properly select the controller tuning rule so that the preferred performance criteria is achieved. Enough detail is provided in the simulated model to capture the major dynamics including nonlinearities, interactions and constraints. A four lump yield model is plugged to the simulated FCCU model to capture the reaction kinetics. With an objective to satisfy minimum overshoot as the performance criteria, PI controllers implemented for reactor and regenerator temperature control of FCCU were tuned with two different tuning rules for satisfying minimum overshoot as the required performance criteria.
Search Articles
Keywords: Fluidized Catalytic Cracking Unit, Four Lump Yield Model, Gasoline yield, Reactor and Regenerator temperature control, PI Controller Tuning, minimum overshoot
Pages: 297-306
WSEAS Transactions on Systems and Control, ISSN / E-ISSN: 1991-8763 / 2224-2856, Volume 10, 2015, Art. #32