Abstarct: Abstract In recent decades, the increase in greenhouse gas concentrations, particularly carbon dioxide (CO₂), has emerged as one of the most critical environmental challenges, significantly contributing to global warming and climate change. Reducing CO₂ emissions and efficiently capturing this gas from industrial pollution sources are key strategies to mitigate its detrimental environmental impacts. Conventional CO₂ capture methods, such as those using amines, are associated with high costs, excessive energy consumption, and environmental issues, including the generation of chemical waste. Therefore, developing more sustainable and efficient alternatives is imperative. In this context, deep eutectic solvents (DESs) have been introduced as innovative and environmentally friendly substitutes. This study investigates CO₂ capture using a ternary deep eutectic solvent composed of choline chloride (ChCl), glycerol (Gly), and imidazole (Im). The experimental design was carried out using Design-Expert software, baxsed on a full factorial method. Three main factors were analyzed: temperature (30, 45, and 60 °C), the molar ratio of ChCl:Gly (1:1, 1:2, and 1:3), and the concentration of imidazole (1, 2, and 3 mol/L). CO₂ absorption performance was assessed by measuring pressure and temperature changes in a laboratory-scale system; the results were analyzed using the Peng–Robinson equation. The results indicated that temperature and solvent composition significantly influence CO₂ absorption capacity. Optimal absorption was observed at lower temperatures and specific ChCl:Gly ratios. Adding imidazole as the third solvent component substantially enhanced the gas absorption capacity due to stronger interactions with CO₂. This study demonstrates that ternary deep eutectic solvents exhibit high potential for CO₂ capture under in dustrial conditions and can serve as cost-effective and environmentally friendly alternatives to conventional solvents. Finally, this research identifies optimal conditions for practical operations and provides reliable data for further development of deep eutectic solvents for industrial applications. It lays the groundwork for future studies on designing innovative gas capture solvents.