Determination of Mass Transfer Coefficient in an Inverse Fluidized Bed Reactor using Statistical and Dynamic Method for a Non-Newtonian Fluid

Abstract

Liquid-phase volumetric mass transfer coefficients, kLa were determined in three-phase inverse fluidized bed reactor of Polypropylene (PP) spheres with 8mm diameter, fluidized by a countercurrent flow of air and non-Newtonian liquid [xanthan gum]. The effects of liquid, gas velocity, solid loading and concentration of xanthan gum on the volumetric mass transfer coefficient, k_La were determined. The superficial liquid velocity had a weak effect on the mass transfer whereas the gas flow rate affected the mass transfer positively. k_La decreased with increase in initial bed height (solid loading). k_La decreased as the concentration of xanthan gum increased. The results are determined by using statistical method (Response Surface Methodology) and dynamic method (experimental method).