Modeling of industrial reactors and processes for the polymeriszation of propylene

Abstract : In this thesis, rigorous steady and dynamic models have been developed for an industrial propylene polymerization process. They have then been used to develop new processes based on the existing one. For that purpose, this thesis has: ? reviewed the state of the art of the olefin Ziegler-Natta catalysts; ? analyzed classical propylene polymerization processes and their characteristics; ? analyzed the characteristics of industrial slurry and gas phase propylene polymerization reactors using representative slurry propylene polymerization and gas phase polymerization reactors in series; studied the models for calculating the thermodynamic properties of complex propylene polymerization systems and methods for determining their parameters; ? developed a dynamic model for an entire industrial propylene polymerization process composed of a slurry reactor and several gas phase reactors in series. This model is based on rigorous polymerization kinetics involving several Ziegler-Natta active sites ? investigated the operating conditions and dynamic characteristics of the reactors ? simulated grade transition processes and optimum polymerization processes. Some of the results are original, and scientifically and technologically relevant.
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Lian-Fang Feng. Modeling of industrial reactors and processes for the polymeriszation of propylene. Food and Nutrition. Institut National Polytechnique de Lorraine, 2006. Chinese. ⟨NNT : 2006INPL058N⟩. ⟨tel-01752757⟩

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