Abstract

Prediction of Onset Semi-Fluidization Velocity of Three-Phase Semi- Fluidized Beds

Author(s): Pooja V. Shrivastava, A. B. Soni and H. Kumar

A semi-fluidized bed is characterized by a combination of packed bed or fixed bed at the top and fluidized bed at the bottom within a single contacting vessel. Such a bed has advantages of both packed and fluidized beds. Various authors have studied the hydrodynamics, mass transfer, reaction kinetics of semi-fluidized beds of two phases and few studies in three phases. In the present study hydrodynamic characteristics viz. onset (minimum) semi-fluidization velocity of a co-current gas-liquid-solid semifluidized bed have been studied using liquid as continuous phase and gas as discrete phase. Experiments have been conducted in a 100 mm ID, 1.8 m height vertical Perspex column using air, water and glass beads in order to develop a good understanding of each flow regime in gas-liquid-solid semi-fluidization. It is found that minimum liquid semi-fluidization velocity increases with bed expansion ratio and decreases with superficial gas velocity.


Share this       
izmir escort izmir escort bursa escort antalya escort izmir escort porno porno izle türk porno eskişehir escort bartın escort burdur escort izmir escort bursa escort porno indir izle escort izmir