Membrane-based technologies are an attraction for the adsorption of CO2 (Table ). They offer a cost-effective solution with a high ability for CO2 adsorption. They circumvent some of the challenges of other technologies, such as multiple stages procedures that include pressurizing, depressurizing, and purging. They provide high efficiencies compared to other methods such as conventional pressure swing adsorption systems or cryogenic separation methods. The membranes should exhibit pore continuity (interconnectivity) with defect-free structure and high adherence to the substrate surface for high-adsorption performance.