Optimal Grade Transition of a Gas Phase Ethylene Polymerization Reactor

سال انتشار: 1386
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,263

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شناسه ملی سند علمی:

ICHEC05_249

تاریخ نمایه سازی: 7 بهمن 1386

چکیده مقاله:

Decreasing the amount of off-spec product during the grade transition in polymerization processes is the main objective. In this study, optimization of grade transition operation for a gas phase ethylene polymerization reactor is considered. Using the copolymerization kinetics and conservation laws, the dynamic behavior of the reactor has been modeled. Optimal trajectories of variables are determined by applying control vector parameterization method and using the system dynamic model. By applying the optimal trajectories, the amount of off-spec product is decreased noticeably. The GPC (Generalized predictive controller) and PI (proportional Integral) controllers are used to track the determined optimal trajectories. Simulation results indicate that GPC has a better performance.

نویسندگان

Leily Mohammadi

Chemical and Petroleum Engineering Department, Sharif University of Technology,Tehran, Iran

Mohammad Shahrokhi

Chemical and Petroleum Engineering Department, Sharif University of Technology,Tehran, Iran