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Abstract
Noble gases (helium [He], neon [Ne], argon [Ar], krypton [Kr], xenon [Xe], and radon [Ra]), which occupy only about 0.94% of the air with low chemistry reactivity, are now widely used in many fields such as in tracer application, lighting, and imaging. Because of low concentration in the air and their inertia, chemical properties make them difficult to separate from air or from each other. The conventional means of storage and separation is liquefaction, which is expensive due to the low boiling points and low concentrations of noble gases. An alternative method is adsorption, that is, capturing and separating noble gases using porous adsorbents. In this chapter, we discuss the recent advances of carbon and noncarbon-based nanoporous adsorbents such as activated carbon, graphene, metal–organic frameworks, zeolites, and metal formates as adsorbents for noble gas adsorption and separation. The role of computer simulation in finding optimal materials for Xe and Kr adsorption will also be discussed.
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