Effect of Vertical Internals on the Pressure Drop in a Gas-Solid Fluidized Bed


The pressure drop at the wall and the radial profiles of pressure drop along the bed height were measured using a differential pressure transducer and pressure probe-differential pressure transducer in a gas-solid fluidized bed with a 0.14 m inside diameter. Two types of circular arrangements of intense vertical internals (0.0254 and 0.0127 m diameter), two kinds of solid particles of Geldart B type (glass beads and aluminum oxide), and four selected superficial gas velocities in terms of u/umf were employed to evaluate the impact of these different designs, as well as the physical and operating variables on the pressure drop measured at the wall of the bed and the radial pressure drop inside the fluidized bed. Experimental results demonstrated that the 0.0254 m internals reduced the pressure drop at the wall and the radial pressure drop inside the bed by about 10% compared to without internals. This result holds true for both kinds of solids utilized. However, the implementation of 0.0127 m internals inside the gas-solid fluidized bed led to a decrease in the pressure drop and radial pressure drop for glass bead solid particles and an increase in the pressure drop in aluminum oxide solid particles. The experimental results in the form of relevant dimensionless groups were correlated using the statistical analysis software of JMP 12, due to the big difference between the experimental results of this work and the predicted values from the available correlations. The new correlation has been developed with a mean relative deviation value of 1.08% between the experimental and predicted values.


Chemical and Biochemical Engineering

Keywords and Phrases

Gas-solid Fluidized Bed; Pressure Drop; Pressure Transducer; Vertical Internals

International Standard Serial Number (ISSN)

0008-4034; 1939-019X

Document Type

Article - Journal

Document Version


File Type





© 2018 Wiley-Liss Inc., All rights reserved.

Publication Date

01 Oct 2018