Experimental investigation of cluster properties in dense gas–solid fluidized beds of different diameters--颗粒学报PARTICUOLOGY

Firuzian, N., Sotudeh-Gharebagh, R., & Mostoufi, N. (2014). Experimental investigation of cluster properties in dense gas–solid fluidized beds of different diameters. Particuology, 16, 69–74. https://doi.org/10.1016/j.partic.2013.10.008

Experimental investigation of cluster properties in dense gas–solid fluidized beds of different diameters

Niloufar Firuzian, Rahmat Sotudeh-Gharebagh^*, Navid Mostoufi

Multiphase Systems Research Laboratory, Oil and Gas Processing Centre of Excellence, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran

10.1016/j.partic.2013.10.008

Volume 16, October 2014, Pages 69-74

Received 13 May 2013, Revised 16 September 2013, Accepted 9 October 2013, Available online 8 January 2014.

E-mail: sotudeh@ut.ac.ir

Highlights

• Cluster properties were investigated in three bubbling fluidized beds of different diameters.

• Velocity of clusters remained constant as the column diameter changed.

• Larger clusters were formed in a larger column.

• Larger column had clusters of greater void fraction.

• Larger particles tended to form larger clusters with greater void fraction.

Abstract

The local solid flow structure of a bubbling fluidized bed of sand particles was investigated in three different columns to characterize the properties of clusters. The experiments were performed using a reflective optical fiber probe. The variations in size, velocity, and void fraction of the clusters due to changes in the superficial gas velocity, particle size, and radial positions were studied. The results indicate that the velocity of the clusters remained unchanged while their size increased as the column diameter increased. In addition, the radial profile of the clusters’ velocity did not depend on the radial position. The results indicate that larger particles form larger clusters, which move slower.

Graphical abstract

Keywords

Cluster; Optical fiber probe; Gas–solid fluidized bed; Column diameter

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