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Radioactive particle tracking in a lab‐scale conical fluidized bed dryer containing pharmaceutical granule
Author(s) -
Khanna Pankaj,
Pugsley Todd,
Tanfara Helen,
Dumont Hubert
Publication year - 2008
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20073
Subject(s) - granule (geology) , conical surface , fluidized bed , magnetosphere particle motion , particle size , mechanics , materials science , fluidization , particle (ecology) , spheres , mineralogy , chemistry , physics , chemical engineering , composite material , geology , thermodynamics , engineering , oceanography , quantum mechanics , magnetic field , astronomy
Radioactive particle tracking (RPT) has been used to study the motion of the particulate phase in a bench‐scale conical fluidized bed containing dried pharmaceutical granule. RPT revealed that there is a distinct circulation pattern of the granule with particles moving upwards at high velocities near the centre of the bed and falling slowly near the walls. There was also a localized region near the centre of the bed where particles moved downward rapidly. The particle size distribution (PSD) of the granule had an appreciable impact on particle motion with a wide PSD leading to larger fluctuations in particle velocity as well as poorer granule mixing.