1547-5905/asset/AIC_left.gif?v=1&s=43a3d567c64d3d5d712c0af6c2cacb1e1bcc1a2b)
1547-5905/asset/AIC_right.gif?v=1&s=518efadeedca9ceeef271499f690fdebd2ed9164)
Particle Technology and Fluidization
Bubbles in a fluidized bed: A fast X-ray scanner
Article first published online: 29 NOV 2010
DOI: 10.1002/aic.12469
Copyright © 2010 American Institute of Chemical Engineers (AIChE)
Additional Information
How to Cite
Mudde, R. F. (2011), Bubbles in a fluidized bed: A fast X-ray scanner. AIChE J., 57: 2684–2690. doi: 10.1002/aic.12469
Publication History
- Issue published online: 9 SEP 2011
- Article first published online: 29 NOV 2010
- Accepted manuscript online: 15 OCT 2010 01:29PM EST
- Manuscript Revised: 23 SEP 2010
- Manuscript Received: 21 JAN 2010
- Abstract
- Article
- References
- Cited By
Keywords:
- X-ray tomography;
- time resolved;
- spatial resolution;
- SART;
- bubbling fluidized bed
Abstract
We present experiments on a bubble train in a 23-cm-diameter fluidized bed of a Geldart B powder. The bubbles are injected via a single capillary inserted in the bed. We use our double X-ray tomographic scanner to measure the solids distribution in two parallel cross sections of the bed. We report data for four different heights of the measuring planes above the capillary outlet. The velocity of individual bubbles is found from the time of flight from the lower to the upper plane. We have done separate calibration experiments for the velocity. In this article, we present data for the size and velocity of individual bubbles. From the bubble velocity, we could obtain the vertical dimension of the bubbles. This makes it possible to measure the volume of each bubble. The results show that our scanner is capable of measuring properties of bubbles with a size of 2.5 cm and above. © 2010 American Institute of Chemical Engineers AIChE J, 2011