Scale effects in fluidized multiphase reactors

Krishna, R. ; van Baten, J. M. ; Ellenberger, J. (1998) Scale effects in fluidized multiphase reactors Powder Technology, 100 (2-3). pp. 137-146. ISSN 0032-5910

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/S0032-5910(98)00134-X

Abstract

It is shown that the two-phase model for bubbling gas - solid fluidized beds can be extended to bubble column slurry reactors operating in the heterogeneous flow regime by proper definition of the 'dilute' and 'dense' phases. The 'dilute' phase in a bubble column slurry reactor is to be identified with the fast-rising 'large' bubbles. The 'dense' phase consists of the slurry phase in which 'small' bubbles are finely dispersed. With the aid of extensive experimental data obtained in columns of 0.1, 0.19 and 0.38 m diameter it is shown that the rise velocity of the 'dilute' phase for gas - solid fluid beds and slurry reactors show analogous scale dependencies and can be modelled in a similar manner. It is also demonstrated that fluidized multiphase reactors can be modelled in a common manner using Computational Fluid Dynamics (CFD) within the Eulerian framework. It is concluded that CFD is an invaluable tool for scaling up of fluidized multiphase reactors.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Gas-solid Fluidized Bed; Computational Fluid Dynamics; Slurry Reactors; Scale Up; Two-phase Model
ID Code:65469
Deposited On:17 Oct 2011 03:02
Last Modified:17 Oct 2011 03:02

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