<p>The CO₂ gas which causes global warming effect, is important to note that capture of CO₂ gas is necessary to control the global warming effect. The main objective of this research paper is to evaluate the absorption performance of nanofluids for absorption of CO₂. The nanofluids used are DI water based Al₂O₃ and ZnO. Direct contact method of absorption has been experimented in this research work and specially made absorption cell of stainless steel 316L material. The experiments were conducted for nanofluid concentration of 0.03, 0.06, 0.09 and 0.12 wt.%, and 5, 7.5 and 10 bar initial pressure inside the absorption cell. In this research work, the effect of type of nanoparticles, nanofluid concentration and initial pressure on CO₂ absorption is evaluated. The absorption takes place at absorbents upper interface when the CO₂ gas is present inside the absorption cell. It was found that addition of nanoparticles increases the CO₂ absorption as compared to basefluid. Further, it was found that there is an increase of 8%, 14.2% and 17.2 % at 5, 7.5 and 10 bar initial pressure respectively for Al₂O₃ nanofluid and increase of 17.9%, 20.98% and 25.4% at 5, 7.5 and 10 bar initial pressure respectively for ZnO nanofluid. The prepared nanofluids were characterized by Zeta Potential analysis and UV–Vis Spectrophotometer, techniques for analyzing the stability of nanofluids. From the results, it was found that ZnO 0.06 wt.% is highly stable as compared to other concentrations of ZnO. 0.12 wt.% of Al₂O₃ is highly stable as compared to other concentrations of Al₂O₃.</p>