Reduction of CO₂ emissions is a major challenge in the transition towards more sustainable energy systems. The conventional methods of acidizing involve the use of powerful mineral acids, which could lead to environmental problems and operational challenges. This study aims to develop an alternative approach and solution to these problems by creating a hyperbranched amino-cellulose composite that can act as an absorbent in capturing CO₂ for future uses. This composite material was created by performing amine functionalization and cross-linking of cellulose in order to have effective CO₂ absorption . The composite material was analyzed using FTIR, XRD, and FESEM. The effect of CO₂ pressure, absorbent time, and concentration on the absorption capacity was studied. The composite synthesized at 70 °C exhibited the highest absorption performance among the samples under consideration. An increase in CO₂ pressure led to an improvement in adsorption, but adsorption equilibrium was achieved after 45 min. an optimum adsorbent dosage of 2 g/L was obtained, whereas higher dosage did not result in a significant improvement in absorption performance. The enhanced absorption performance can be attributed to the introduction of hyperbranched amino functional groups which provide additional active site for CO2 capture. In general, the obtained Hyperbranched Amino-Cellulose Composite showed good performance in CO₂ capture and could be considered as a sustainable material for use in integrated carbon capture.