Title :
Different hydrodynamic model for gas-phase propylene polymerization in a catalytic fluidized bed reactor
Author :
Shamiri, Ahmad ; Mohamed Azlan, H. ; Farouq, S.M. ; Mostoufi, Navid
Author_Institution :
Dept. of Chem. Eng., Univ. of Malaya, Kuala Lumpur, Malaysia
Abstract :
A comparative simulation study was carried out using the improved well-mixed, constant bubble size and well mixed models. These fluidized bed reactor models, combined with comprehensive kinetics for propylene homopolymerization in the presence of a multiple active site Ziegler-Natta catalyst. In the improved model, the effect of the presence of particles in the bubbles and the excess gas in the emulsion phase was taken into account to improve the quantitative understanding of the actual fluidized bed process. The superficial gas velocity and catalyst feed rate have a strong effect on the hydrodynamics and reaction rate, which results in a greater variation in the polymer production rate and reactor temperature. At typical operating conditions the improved well mixed and well mixed models were in good agreement. While the constant bubble size model was found to over-predict the emulsion phase temperature and under-predict propylene concentration.
Keywords :
bubbles; catalysis; catalysts; chemical reactors; fluidised beds; hydrodynamics; polymerisation; catalyst feed rate; catalytic fluidized bed reactor; emulsion phase; gas-phase propylene polymerization; hydrodynamic model; multiple active site Ziegler-Natta catalyst; polymer production rate; superficial gas velocity; Heating; Inductors; Polymers; Production; Ziegler-Natta catalyst; component; fluidized bed reactor; hydrodynamics; propylene polymerization;
Conference_Titel :
Chemical, Biological and Environmental Engineering (ICBEE), 2010 2nd International Conference on
Conference_Location :
Cairo
Print_ISBN :
978-1-4244-8748-6
Electronic_ISBN :
978-1-4244-8749-3
DOI :
10.1109/ICBEE.2010.5650450