Carbon dioxide released in the atmosphere is the supposed principal cause of greenhouse effect, leading to global warming. The present work is a thermodynamic study carried out in the framework of the ANR CapCO2 (French National Research Agency) on the treatment of CO2 in post-combustion effluents. Our objective is to obtain reliable thermodynamic data for different amines in order to correlate absorption properties with amine structure. This work is the continuation and the extension of a study on aqueous solutions of alkanolamines [1,2]. The enthalpies of solution of CO2 with aqueous solutions of the selected amines are determined by flow calorimetry at constant temperature and pressure, using a customized flow mixing unit adapted to the SETARAM C-80 calorimeter [1] at 313.15 and 353.15 K for pressures up to 2 MPa. The solution densities [3] are determined at 303.15 K as function of pressure, up to 2 MPa using an Anton Paar vibrating tube densimeter DMA 512P. As the enthalpy of protonation of the amine represents the largest contribution [4-5] to the enthalpy of solution, the protonation constants of our selected amines were particularly examined. Experimental values were obtained at atmospheric pressure and at temperatures up to 343.15 K using an automatic titrator from Mettler-Toledo, equipped with a glass electrode. Influence on thermodynamic properties of the amine structure and its basicity will be discussed simultaneously to the intensive parameters. The amines will be classified regarding their efficiency for CO2 capture, and compared to the MonoEthanolAmine, MEA, considerate as reference in amine-based CO2 capture process.