Separation and storage of CO2 from power plant flue gases can prevent the release of large quantities of CO2 into the atmosphere. The primary candidates for carbon capture and storage applications are porous solids. A critical challenge in the development of these advanced materials is to understand and control the phenomenon of CO2 sorption hysteresis, whereby the path to adsorption of CO2 molecules by the solid materials differs from that of desorption. First-principles simulations combined with experiments have been used to fundamentally understand CO2 sorption behavior in a nanoporous solid, cryptomelane-type manganese dioxide OMS-2. Such a porous structure is only stabilized in the presence of cations. The concentration, type and charge of cations have significant effects on CO2 adsorption and diffusion. The diffusion mechanism of CO2 in the OMS-2 will be discussed.

Nanoporous materials by design for carbon capture and storage

245th National Meeting (2013)

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