The intensification and mechanism of gas-liquid mass transfer in a water-sparged aerocyclone by microparticles were conducted in this paper. The effects of solid concentration cs

gas inlet velocity ug and liquid jet velocity uL on specific mass transfer area a

mass transfer coefficient of liquid side kL

volumetric mass transfer coefficient kLa and mass transfer intensification factor E were investigated by using a chemical method (CO2-air-NaOH absorption system) and a physical method (CO2-air-H2O absorption system). The results indicated that the kL

a

kLa and E increased and then decreased with the increase of solid concentration cs

cs has a maximum value. Solid particles could intensify mass transfer

increasing kL

a and kLa under different ug and uL

whereas E decreased with the increase of ug and uL. The mechanism of solid particles intensifying gas-liquid mass transfer was realized through the three paths from increasing a

kL and S

but the increase of the surface renew frequency S was the major mechanism.