Collect. Czech. Chem. Commun. 1979, 44, 50-55

Model of fluidized bed expansion

Benitto Mayrhofer, Lubomír Neužil and František Procháska

Department of Chemical Engineering, Prague Institute of Chemical Technology, 166 28 Prague 6


Theoretical relations have been derived for the superficial velocity of fluidization under the creeping flow regime for cubic, monoclinic and tetrahedron configurations of spherical particles. The models proposed have been compared with theoretical models published up to the present and with the power-law correlations recommended. The configuration fitting the best was found to be the tetrahedron one. All configurations examined in this work gave correct trend of the velocity of fluidization versus porosity dependence. Experimental data indicate that for the bed porosity ranging between 0.45 and 0.68 our models are better than other so far published. However theoretical models of other authors based on the analysis of the behavior of a fixed bed give better results.