In this work, batch and dynamic adsorption tests are coupled for an accurate evaluation of CO 2 adsorption performance of three different activated carbons (AC) obtained from olive stones by chemical activation followed by physical activation with CO 2 at varying times (i.e., 20, 40, and 60 h). Kinetic and thermodynamic CO 2 adsorption tests from simulated flue gas at different temperatures and CO 2 pressures are carried out under both batch (a manometric equipment operating with pure CO 2 ) and dynamic (a lab-scale fixed-bed column operating with a CO 2 /N 2 mixture) conditions. The textural characterization of the AC samples shows a direct dependence of both micropore and ultramicropore volume on the activation time; hence, AC60 has the higher contribution. The adsorption tests conducted at 273 and 293 K showed that when CO 2 pressure is lower than 0.3 bar, the lower the activation time, the higher CO 2 adsorption capacity; a ranking of ω eq (AC20) > ω eq (AC40) > ω eq (AC60) can be exactly defined when T = 293 K. This result is likely ascribed to the narrower pore size distribution of the AC20 sample, whose smaller pores are more effective for CO 2 capture at higher temperature and lower CO 2 pressure, the latter representing operating conditions of major interest for decarbonation of flue gas effluent. Moreover, the experimental results obtained from dynamic tests confirm the results derived from the batch tests in terms of CO 2 adsorption capacity. It is important to highlight the fact that the adsorption of N 2 on the synthesized AC samples can be considered to be negligible. Finally, the importance of proper analysis for data characterization and adsorption experimental results is highlighted for the correct assessment of the CO 2 removal performance of activated carbons at different CO 2 pressures and operating temperatures.