关键词: airlift loop reactor;static mixer;stirrer;hydrodynamics;mass transfer

Abstract: The mechanically stirred internal loop airlift reactors equipped with or without static
mixers are devised for intensification of gas-liquid mass transfer rate. The influences of
superficial gas velocity, agitation or static mixers on gas hold-up, mixing time, liquid
circulating velocity and volumetric mass transfer coefficient have been investigated with
tap water and carboxymethyl cellulose (CMC) aqueous solution. The experimental results
indicate that mechanical agitation is more efficacious than static mixer in highly viscous
media for improving mass transfer in airlift reactors. The empirical correlation of
volumetric mass transfer coefficient with apparent viscosity, and energy consumption for
mechanical agitation and aeration is developed.

Key words: airlift loop reactor, static mixer, stirrer, hydrodynamics, mass transfer