Influence of the particle size and superficial gas velocity on the sublimation of pure substances in fluidized beds of different sizes

In the present study the sublimation of large solid carbon dioxide particle s inside fluidized beds of fine particles is' investigated. A model which t akes the surface area of the sublimable particles into account is used to d escribe the sublimation kinetics. Based on this model, the results of diffe rent experiments, namely single particle experiments using a precision scal e, batch experiments in a laboratory-scale fluidized bed and continuous exp eriments in a larger circulating fluidized bed are compared. The main focus of the study is to evaluate the influences of the particle size, of the in ert bed material, of the bed temperature and of the superficial gas velocit y, respectively.