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Study of Modeling of Propylene Polymerization Reactor

Author: LiuZhanWei
Tutor: LiJianWei
School: Beijing University of Chemical Technology
Course: Chemical Engineering
Keywords: Polypropylene A continuous stirred tank reactor Loop reactor Model
CLC: TQ325.14
Type: Master's thesis
Year: 2009
Downloads: 65
Quote: 1
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Abstract


The propylene polymerization Model is today one of the hot control . Propylene polymerization reaction mechanism is very complex, so far not fully analyze a variety of polypropylene production process , how accurate representation of the dynamic behavior of the polymerization of propylene , to calculate the thermodynamic property data of the reaction system , and computer simulation and modeling of the polymerization process It is the basis for the optimization of the design and control of the reactor . First, the analysis of the reaction mechanism of the polymerization of propylene and to obtain a simplified polymerization mechanism , to provide a theoretical basis for the model ; calculated thermodynamic physical properties data of the reaction system using experience equation and PC - SAFT state equation , for the accurate calculation of the model to provide a basis . Propylene gas phase polymerization continuous stirred tank reactor ( CSTR ) for the study, according to the material and energy accounting equation , propylene gas phase polymerization reactor model . Simulation of steady-state and dynamic variation of the solids rate , monomer concentration , gas hydrogen concentration , reaction temperature and other important variables, and these variables , laid the foundation for advanced control for the gas-phase propylene polymerization process . From the heat balance of the reactor to start analyzing the operating performance of the reactor , and pointed out the variation of the thermal stability with the operating conditions . The kinetic parameters of the model using data published in the literature , and corrected in the actual calculation . Finally, the liquid phase propylene polymerization loop reactor ( LR ) for the study, the model of the reactor material balance , energy balance and dynamics equations to calculate the distribution of key process variables along the length of the tube , and to analyze the impact of the different cycle than the slurry solids holdup , the reaction temperature and other key indicators , the same operator to start from the reactor heat balance , the thermal stability of the reactor ; polymerization mechanism , the establishment of molten polypropylene a mathematical model of the index , laid the foundation for the polymerization of propylene advanced process control optimization and quality control .

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CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Polymer resin and plastic > Polyolefin plastic > Polypropylene
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