Kunii-Levenspiel Model for Fluidized Beds

FIGURE 5.34 Schematic structure of a fluidized bed according to the Kunii-Levenspiel model. (Data from Levenspiel, O., Chemical Reaction Engineering, 3rd Edition, Wiley, New York, 1999.) 

In Equation 5.231, the indexes b, c, and e refer to the bubble, cloud, and emulsion phases, respectively. The mass balance for component i is valid in the bubble phase 

The following balance equation is valid for the cloud and wake phases  

After elimination of the terms Kcei (Cd — Cd) in Equation 5.235 with the help of Equation 5.237 and, consequently, after insertion of the expression for Tbc (tb — Cd) thus obtained in Equation 5.233, we obtain 

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