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Appl. Sci. 2019, 9(3), 572; https://doi.org/10.3390/app9030572

Nanopowder Fluidization Using the Combined Assisted Fluidization Techniques of Particle Mixing and Flow Pulsation

1
Dept. of Chemical Engineering, King Faisal University, PO Box 380, Al-Ahsa 31982, Saudi Arabia
2
General Directorate of Research Grants, King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia
3
Dept. of Chemical Engineering, King Saud University, PO Box 800, Riyadh 11421, Saudi Arabia
*
Author to whom correspondence should be addressed.
Received: 21 January 2019 / Revised: 1 February 2019 / Accepted: 6 February 2019 / Published: 9 February 2019
(This article belongs to the Section Nanotechnology and Applied Nanosciences)
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Abstract

In the present study, we report the fluidization behavior of ultrafine nanopowder using the assisted fluidization technique of particle mixing, which was further superimposed with the pulsation of the inlet gas flow to the fluidized bed. The powder selected in the present study was hydrophilic nanosilica, which shows strong agglomeration behavior leading to poor fluidization hydrodynamics. For particle mixing, small proportions of inert particles of Geldart group A classification were used. The inlet gas flow to the fluidized bed was pulsed with a square wave of frequency 0.1 Hz with the help of a solenoid valve controlled using the data acquisition system (DAQ). In addition to the gas flow rate to the fluidized bed, pressure transients were carefully monitored using sensitive pressure transducers connected to the DAQ. Our results indicate a substantial reduction in the effective agglomerate size as a result of the simultaneous implementation of the assisted fluidization techniques of particle mixing and flow pulsation. View Full-Text
Keywords: Assisted fluidization; particle mixing; flow pulsation; agglomeration; hysteresis Assisted fluidization; particle mixing; flow pulsation; agglomeration; hysteresis
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Ali, S.S.; Basu, A.; Alfadul, S.M.; Asif, M. Nanopowder Fluidization Using the Combined Assisted Fluidization Techniques of Particle Mixing and Flow Pulsation. Appl. Sci. 2019, 9, 572.

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