Different hydrodynamic model for gas-phase propylene polymemation in a catalytic fluidized bed reactor

Shamiri, A. and Hussain, M.A. and Mjalli, F.S. and Mostoufi, N. (2010) Different hydrodynamic model for gas-phase propylene polymemation in a catalytic fluidized bed reactor. In: 2nd International Conference on Chemical, Biological and Environmental Engineering, ICBEE 2010, 2010, Cairo.

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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 homo-polymerization 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 COO!ICU bubble size model was found to over-predict the emulsion phase temperature and underpredict propylene concentration.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Conference code: 83351 Export Date: 5 March 2013 Source: Scopus Art. No.: 5650450 doi: 10.1109/ICBEE.2010.5650450 Language of Original Document: English Correspondence Address: Shamiri, A.; Department of Chemical Engineering, University of Malaya, Kuala Lumpur, Malaysia; email: ahmadshamiri@gmail.com References: McAuley, K.B., Talbot, J.P., Harris, T.J., A comparison of two phase and well-mixed models for fluidized bed polyethylene reactors (1994) Chem. Eng. Sci., 49, pp. 2035-2045; Choi, K.Y., Ray, W.H., The dynamic behavior of fluidized bed reactors for solid catalyzed gas phase olefin polymerization (1985) Chem. Eng. Sci., 40, pp. 2261-2278; Hatzantonis, H., Yiannoulakis, H., Yiagopoulos, A., Kiparissides, C., Recent developments in modeling gas-phase catalyzed olefin polymerization fluidized-bed reactors: The effect of bubble size variation on the reactor's performance (2000) Chem. Eng. Sci., 55 (16), pp. 3237-3259; Alizadeh, M., Mostoufi, N., Pourmahdian, S., Sotudeh-Gharebagh, R., Modeling of fluidized bed reactor of ethylene polymerization (2004) Chemical Engineering Journal, 97 (1), pp. 27-35. , DOI 10.1016/S1385-8947(03)00133-5; Shamiri, A., Hussain, M.A., Mjalli, F.S., Mostoufi, N., Kinetic modeling of propylene homopolymerization in a gas-phase fluidizedbed reactor (2010) Chem. Eng. J., 161, pp. 240-249; Luo, Z.H., Su, P.L., Shi, D.P., Zheng, Z.W., Steady-state and dynamic modeling of commercial bulk polypropylene process of Hypol technology (2009) Chem. Eng. J., 149, pp. 370-382; McAuley, K.B., Macgregor, J.F., Hamilec, A.E., A kinetic model for industrial gas-phase ethylene copolymerization (1990) A.I.Ch.E.J., 36, pp. 837-850; Cui, H.P., Mostoufi, N., Chaouki, J., Characterization of dynamic gassolid distribution in the fluidized beds (2000) Chem. Eng. J., 79, pp. 135-143; Cui, H.P., Mostoufi, N., Chaouki, J., Gas and solids between dynamic bubble and emulsion in gas-fluidized beds (2001) Powder Technol., 120, pp. 12-20; Meier, G.B., Weickert, G., Van Swaaij, W.P.M., Gas-phase polymerization of propylene: Reaction kinetics and molecular weight distribution (2001) J. Polym. Sci. A: Polym. Chem., 39, pp. 500-513 Sponsors: Asia-Pac. Chem., Biol. Environ. Eng. Soc. (APCBEES)
Uncontrolled Keywords: Fluidized bed reactor; Hydrodynamics; Propylene polymerization; Ziegler-Natta catalyst; Active site; Bubble size; Catalyst feed rates; Comparative simulation; Fluidized bed reactors; Gasphase; Hydrodynamic model; Improved models; Mixed models; Operating condition; Phase temperature; Polymer production rate; Reactor temperatures; Superficial gas velocities; Ziegler-Natta catalysts; Astatine; Catalysts; Chemical reactors; Computer simulation; Emulsification; Environmental engineering; Fluid catalytic cracking; Fluid dynamics; Fluidization; Fluidized bed furnaces; Fluidized beds; Polymerization; Polymers; Propylene; Reaction rates; Fluidized bed process.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 10 Jul 2013 02:34
Last Modified: 19 Dec 2014 02:47
URI: http://eprints.um.edu.my/id/eprint/7024

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