Abstract
Hydrodynamics and heat transfer experiments have been conducted in three-phase fluidized beds (TPFB) of 3 and 5 mm glass spheres. To simulate biological systems, pseudoplastic solutions of xanthan were employed. The gas and liquid flow rates ranged from 0.01 to 0.14 m/s and 0.013 to 0.09 m/s respectively. The impact of these parameters as well as the effect of the effective liquid viscosity (up to 300 mPa s), and the solid size on the gas holdup (ϵ G) as well as the heat transfer coefficient (h) has been investigated and discussed. New correlations were obtained, which describe satisfactorily ε G and h in TPFB with pseudoplastic solutions with 9.8 % and 4.5 % standard deviation respectively.
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