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

✍ Scribed by V Sivasubramanian; M Velan

• Publisher: Wiley (John Wiley & Sons)
• Year: 2006
• Tongue: English
• Weight: 154 KB
• Volume: 81
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.1527

✦ Synopsis

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. Copyright © 2006 Society of Chemical Industry