Gas–liquid mass transfer in a falling film microreactor (FFMR) with 29 microchannels (0.6mm width
each) was investigated. CO2 was absorbed from a CO2/N2 gaseous mixture into a NaOH aqueous solution
and the liquid-side mass transfer coefficient and the gas-side mass transfer coefficient were measured.
The influence of gas concentration on the value of gas-side mass transfer coefficient has been discussed.