The Effects of Superficial Gas Velocity and Liquid Phase Properties on Gas Holdup and Mass Transfer In An Airlift Reactor

摘要

Mass transfer coefficient (K La ) and gas hold up ( . g ) were characterized in 8 liter internal air lift loop reactor (down comer-to-riser cross-sectional area ratio = 0.249) as function of the superficial gas velocity in the riser (V gr ). Data were obtained in air–water, air-50% glycerol solution, air-10%acetic acid solution, air- 10%NaCL solution and air-2% carboxyl methyl cellulose solution (CMC) systems. Extent different gas velocity ranges 0.01-0.1 m/s and air dispersed into the center of riser by using porous gas distributor. The results showed that(ε g ) and (K La ) increased with increasing gas velocity and coalescence inhibition in liquid , in (CMC) solution (K La ) is approximately similar to that in water while the increasing in coalescence and liquid viscosity reduces (ε g ) and (K La )