✦ LIBER ✦

Solids mixing in an expanded top fluid bed

✍ Scribed by Amos Avidan; Joseph Yerushalmi

Publisher: American Institute of Chemical Engineers
Year: 1985
Tongue: English
Weight: 832 KB
Volume: 31
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690310520

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✦ Synopsis

This study investigated solids mixing.of a group A fine powder in a 0.15 m I D expanded top fluid bed with a ferromagnetic tracer. The superficial gas velocity was raised from 0.075 to 1.1 m/s, causing the bed to go through bubbling, slugging, and turbulent fluidization regimes. A countercurrent flow model described the data well at low gas velocities. The bed assumed a more homogeneous appearance at higher gas velocities; a onedimensional axial dispersion model was used to correlate the data. Axial dispersion coefficients increased with gas velocity. The data agree well with literature data for low gas velocities.

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