two-phase modeling of ethylene polymerization in an industrial fluidized bed reactor under condense mode operation

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#