Abstract
The paper presents an original catalytic cracking optimal control system developed by the authors for a catalytic cracking plant. The efficiency improvement for a Romanian catalytic cracking plant using the proposed optimal control system is provided as a case study. The paper is structured in three parts. The first part describes the hierarchical control structure for the fluid catalytic cracking unit. The suggested control structure is the result of extensive analysis of the control structure design strategies used for the chemical process. The second part is dedicated to the study of the objective function of the optimal control system and development of the optimal control system. The last part contains a case study of the Romanian catalytic cracking process. The authors have elaborated a specific process model and an optimal controller. Using the adequate simulation program, the authors have demonstrated the optimal control system efficiency.
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