Two-Phase Modeling of Ethylene Polymerization in an Industrial Fluidized Bed Reactor Under Condense Mode Operation
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1Department of chemical engineering, Amirkabir University of Technology (Tehran Polytechnic), Mahshahr campus, Mahshahr, Iran.
2Amirkabir University of Technology
3Department of polymer engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
4Department of Chemical and Materials Engineering, University of Alberta, Edmonton, T6G 1H9 AB, Canada.
5Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran
Model development for ethylene polymerization in fluidized bed reactor (FBR) under condensed-mode operation is of great importance in both industrial and academic circles due to complex transport phenomena and involving various parameters in the quality of the product. In this study a modified two phase model is developed to predict temperature profile as well as microstructure parameters of polyethylene produced in a FBR under condensed-mode operation. To validate the model, plant data including reactor temperature along the bed as well as melt flow index data as a function of hydrogen to ethylene concentration for three industrial polyethylene grades were compared with the model results. The results confirmed reasonable performance of the model. After checking the validity of the model, effects of changing hydrogen to ethylene concentration on the microstructure parameters were examined and discussed. All the results confirmed the usefully of such technique for industrial applications as well as design purposes for academic and industrial aspects.