The increasing need to limit the effects of climate change and comply with stringent CO₂ emission targets has driven industrial interest in post-combustion carbon capture technologies. Among these, spray towers represent a promising solution due to their simple design, low pressure drop, and direct gas–liquid contact. This thesis develops a Computational Fluid Dynamics (CFD) model of a pilot-scale, multi-nozzle spray tower designed to capture CO₂ from the exhaust gases of a waste-to-energy facility using a 15 wt% aqueous NaOH solution as the absorbent. The objectives are to investigate the influence of the main operating parameters on the absorption process, to integrate an evaporation model and assess its impact on the overall process behaviour, and to identify strategies for improving the overall CO₂ capture efficiency under industrial conditions.