This book describes the tremendous progress that has been made in gas membrane separation based both on inorganic and polymeric materials. Materials discussed include polymer inclusion membranes (PIMs), metal organic frameworks (MOFs), carbon molecular sieves, DDR zeolites, mixed matrix membranes (MMMs), and the NOTT201and NOTT220 membranes as well as other novel materials. This broad survey of gas membranes covers material, theory, modeling, preparation, characterization ( for example, by AFM, IR, X-ray diffraction, Electron spin resonance, Positron annihilation spectroscopy), tailoring of membranes, membrane module and system design, and applications, and concludes with some perspectives about the future direction of the field."