Abstract
We modify the model developed by Ocone et al. [AIChE J. 3(8) (1993)] to include gas phase turbulence and then we test its predictive capabilities in the down flow of air and sand particle suspensions. Subsequently the flow of a diverse solid, namely fluid catalytic cracking (FCC) catalyst, is studied; the computational results for FCC show poor agreement with the experiments obtained by Cheng et al. [Chem. Eng. Sci. 54 (1999) 2019] and Ball and Zhu [Powder Technol. 114 (2000) 96]. However, when a counter-diffusive solid concentration term [Trans. IChemE 78 (2000) 860] is considered in the solid stress tensor, very good agreement with experimental data is observed. Furthermore, the effect of gravity, fluid turbulence, pressure drop and drag force is explored. © 2003 Elsevier B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 73-81 |
Number of pages | 9 |
Journal | Powder Technology |
Volume | 138 |
Issue number | 2-3 |
DOIs | |
Publication status | Published - 10 Dec 2003 |
Keywords
- Cohesion
- Downer reactors
- Downflow
- Fluid cracking catalyst