EFFECT OF PARTICLE DENSITY ON HEAT AND MASS-TRANSFER DURING FLUIDIZED-BED SUBLIMATION

The transfer of heat and mass between a large sublimable object and a sand fluidized bed is studied in terms of both particle size and objec t diameter. Convective and conductive components are identified and di mensional correlations are proposed to predict them. New data are then compared with the results previously obtained with beds of lighter pa rticles such as non-adsorbent molecular sieves. The significant differ ences are discussed and correlations are proposed that underline the e ffect of particle density.