Micro-interface intensified reactor (MIR) can be applied in series/parallel in the absorption of CO

2

in industrial gases by Na

2

CO

3

due to the ability to produce large numbers of stable microbubbles. This work focuses on the variation pattern of mass transfer characteristics parameters of the reaction gas in Na

2

CO

3

solution under the influence of different solution properties and operating parameters in the reaction of CO

2

absorption by Na

2

CO

3

. The mass transfer characteristics parameters include bubble Sauter mean diameter

gas holdup

interfacial area

liquid side mass transfer coefficient

and liquid side volume mass transfer coefficient

k

L

a

. The solution properties and operating parameters include Na

2

CO

3

concentration (0.05–2.0 mol·L

-1

)

superficial gas velocity (0.00221–0.01989 m·s

-1

)

superficial liquid velocity (0.00332–0.02984 m·s

-1

)

and ionic strength (1.42456–1.59588 mol·kg

-1

). And volumetric mass transfer coefficients

k

L

a

and superficial reaction rates

r

of the MIR and the bubble column reactor are compared in

the reaction of sodium carbonate absorption of carbon dioxide

and the former shows a greater improvement under different solution properties and operating parameters. The enhanced role of MIR in mass transfer in non-homogeneous reactions is verified and the feasibility of industrial practical applications of MIR is demonstrated.