Validation of the gas-lift bubble column, a new laboratory device, has been achieved by studying the chemical absorption of carbon dioxide into carbonate/bicarbonate solutions. This reaction has been conducted over a range of temperatures extending from 293.2 K to 343.2 K, and using the hypochlorite ion as a catalyst, with corresponding NaClO molarities ranging from zero to 0.2 M. The Danckwerts model was used. The surface renewal rate s, the liquid-side mass-transfer coefficient kL and the rate constant k2 wer determined. During the hydrodynamic study, the gas-liquid exchange area was evaluated by a photographic method.