The hydrolysis of carbonyl sulfide (COS) was studied in a gas-liquid reactor at room temperature and ambient pressure in presence of alkanolamines, such as monoethanolamine (MEA), diethanolamine (DEA), methyldiethanolamine (MDEA) and diisopropylamine (DIPA). The activity and stability of the different amines was investigated at fixed COS inlet concentration and reaction volume. The highest removal efficiency of COS was obtained in presence of DEA aqueous solution (25 %), while the lowest COS conversion was observed with the tertiary amine MDEA (< 10 %). A greater COS removal was obtained in presence of the higher reaction volume (400 cm3) that was equal to 25 % for DEA and 26 % for DIPA, respectively. Finally, the evaluation of the kinetic constant for the COS hydrolysis reaction with DEA was performed.