CO₂ Separation Using Zeolite-Based Adsorbents and Mixed Matrix Membranes

Reducing CO₂ emissions from human activities is a major environmental challenge. Zeolites are widely studied for this purpose because their pore structures and surface properties can be tailored for gas separation [1–3]. Techniques such as amine grafting, silane treatment, and ion exchange have improved their performance for CO₂ capture [4–6]. Work on creating zeolite nanoparticles, fibers, and foams has helped address mass transfer limitations and made it easier to incorporate zeolites into mixed matrix membranes (MMMs) [7–9]. This review summarizes these developments and discusses remaining challenges for scalable, sustainable CO₂ separation.