Dispersion and Mass Transfer Coefficients in Fluidized Beds: Experimental and Computational Fluid Dynamics Studies

?This study covers three Geldart groups, and includes state-of-the-art experimental measurements and first-principles prediction? The authors solved a longstanding problem in fluidization, namely extremely low Sherwood number of fine particles in fluidized beds? The authors showed that the well-known core-annulus profile reverses in slugging fluidization of Geldart D particles due to particle inertia effects? This new finding is a robust and important one since core-annulus behavior is not desired? These contributions to the field of particle technology are of high impact, and expected to be of lasting influence?? -Christine Hrenya, Professor of Chemical and Biological Engineering, University of Colorado at Boulder. ?The authors have shown that we can eliminate the core-annular regime in risers? By directly computing the mass transfer coefficients, the need to include empirical parameters could be eliminated to obtain more accurate conversion rates??-Reza Mostofi, Ph. D., UOP, A Honeywell Company.