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Evaluation of hydrodynamic behavior of the perforated gas distributor of industrial gas phase polymerization reactor using CFD-PBM coupled model

Akbari, Vahid and Borhani, Tohid Nejad Ghaffar and Aramesh, Roya and Abd. Hamid, Mohd. Kamaruddin and Shamiri, Ahmad and Hussain, Mohamed Azlan (2015) Evaluation of hydrodynamic behavior of the perforated gas distributor of industrial gas phase polymerization reactor using CFD-PBM coupled model. Computers and Chemical Engineering, 82 . pp. 344-361. ISSN 0098-1354

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Official URL: http://dx.doi.org/10.1016/j.compchemeng.2015.07.00...

Abstract

A 2D computational fluid dynamics (Eulerian-Eulerian) multiphase flow model coupled with a population balance model (CFD-PBM) was implemented to investigate the fluidization structure in terms of entrance region in an industrial-scale gas phase fluidized bed reactor. The simulation results were compared with the industrial data, and good agreement was observed. Two cases including perforated distributor and complete sparger were applied to examine the flow structure through the bed. The parametric sensitivity analysis of time step, number of node, drag coefficient, and specularity coefficient was carried out. It was found that the results were more sensitive to the drag model. The results showed that the entrance configuration has significant effect on the flow structure. While the dead zones are created in both corners of the distributors, the perforated distributor generates more startup bubbles, heterogeneous flow field, and better gas-solid interaction above the entrance region due to jet formation.

Item Type:Article
Uncontrolled Keywords:direct quadrature method of moments, gas phase fluidized bed polymerization reactor
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:55095
Deposited By: Fazli Masari
Deposited On:10 Aug 2016 01:39
Last Modified:15 Feb 2017 07:35

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