Mathematical model and advanced control for gas-phase olefin polymerization in fluidized-bed catalytic reactors

Ibrehem, A.S. and Hussain, M.A. and Ghasem, N.M. (2008) Mathematical model and advanced control for gas-phase olefin polymerization in fluidized-bed catalytic reactors. Chinese Journal of Chemical Engineering, 16 (1). pp. 84-89. ISSN 1004-9541

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Abstract

In this study, the developments in modeling gas-phase catalyzed olefin polymerization fluidized-bed reactors (FBR) using Ziegler-Natta catalyst is presented. The modified mathematical model to account for mass and heat transfer between the solid particles and the surrounding gas in the emulsion phase is developed in this work to include site activation reaction. This model developed in the present study is subsequently compared with well-known models, namely, the bubble-growth, well-mixed and die constant bubble size models for porous and non porous catalyst. The results we obtained from the model was very close to the constant bubble size model, well-mixed model and bubble growth model at the beginning of the reaction but its overall behavior changed and is closer to the well-mixed model compared with the bubble growth model and constant bubble size model after half an hour of operation. Neural-network based predictive controller are implemented to control the system and compared with the conventional PID controller, giving acceptable results.

Item Type: Article
Additional Information: 272SG Times Cited:4 Cited References Count:12
Uncontrolled Keywords: control system; dynamic studies; fluidized-bed reactor; mathematical model; olefin polymerization; Chemical activation; Fluidized beds; Heat transfer; Mass transfer; Mathematical models; Polymerization; Fluidized bed reactor; Olefins.
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 03:44
Last Modified: 28 Oct 2014 06:17
URI: http://eprints.um.edu.my/id/eprint/7042

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