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A comprehensive experimental study of the hydrodynamics of gas-solid turbulent fluidized beds is reported for fluid cracking catalyst (FCC) particles in columns of diameter 0.26, 0.61 and 1.56 m. The flow dynamics were investigated by means of pressure transducers, optical probes and capacitance probes. The superficial gas velocity, U c , at which the onset of the turbulent fluidization flow...
Turbulent fluidization has only been widely recognized as a distinct flow regime for the past two decades, even though it is commonly utilized in industrial fluidized-bed reactors due to vigorous gas-solids contacting, favourable bed-to-surface heat transfer, high solids hold-ups (typically 25-35% by volume), and limited axial mixing of gas. Despite its practical importance, turbulent fluidization...
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