Water-sparged aerocyclone(WSA)is a new type of gas-liquid mass transfer equipment with high efficiency

the mass transfer mechanism in WSA was investigated in this paper.The interfacial area(a)was determined by the chemical reaction method with CO2-NaOH solution system

and the liquid mass transfer coefficient(kL)was measured by the physical absorption method with CO2-H2O system.The a

kL and kLa increase with gas inlet velocity(ug)and liquid jet velocity(uL)because of the gas-liquid intense interaction in WSA.The empirical formulae were developed for a

kL and kLa

i.e

a=0.0024Reg1.25WeL0.079

ShL=35.31Reg0.2303WeL0.13

kLa=6.52×10-8Reg1.48WeL0.21

which fit the experimental data well and could be well used to predict the mass transfer characteristics in WSA.The mass transfer models of Whitman' double film theory

Higbie' penetration theory and Danckwerts' surface renewal theory can be well used to interpret the mass transfer mechanism of gas-liquid jet-aerocyclone system in WSA

and the surface renewal theory is the primary mass transfer mechanism.