Modified gas‐perturbed liquid model (GPLM) for minimum fluidization velocity in a two‐phase inverse fluidized bed reactor with Newtonian and non‐Newtonian systems

Abstract

In the present investigation minimum fluidization velocity, U mf , in a two-phase inverse fluidized bed reactor is determined using low-density polyethylene and polypropylene particles of different diameters (4,6 and 8 mm) by measuring pressure drop. In a glycerol system U mf decreased gradually with increase in viscosity up to a value of 6.11 mPa s (60%) and on further increase there was a slight increase in U mf . In the case of the glycerol system the U mf was found to be higher when compared to water. In the non-Newtonian system (carboxymethylcellulose), U mf decreased with increase in concentration in the range of the present study. The U mf was found to be lower when compared to water as liquid phase. The modified gas-perturbed liquid model was used to predict the minimum fluidization liquid velocity (U lmf ) for Newtonian and non-Newtonian systems.

Gas–liquid mass transfer in three‐phase inverse fluidized bed reactor with Newtonian and non‐Newtonian fluids

“…Inverse three-phase fluidized beds are not affected by this problem and have been successfully applied to wastewater treatment [8] and biochemical reactors. [9] Sivasubramanian and Velan [10] studied the hydrodynamics of two-phase and three-phase [11] inverse fluidized bed reactors and applied the modified gas pertubed liquid model (GPLM) to predict minimum fluidization velocity with Newtonian and non-Newtonian fluids.…”