The degree of CO2 absorption by monoethanolamine (MEA) using metal structured packing material, ININ18, was studied. The aqueous solution contained 30?wt-% MEA in countercurrent with CO2 flue gas. The capture process was carried out in an absorption column with dimensions 4.0?m in height and 0.3?m in diameter. The mass transfer coefficient and height of mass transfer were evaluated. Results show a volumetric mass transfer coefficient of 3.76?s1, a height of mass transfer equivalent unit of 0.317?m, and an absorption efficiency of 90?% from flue gas.