Adsorption of Carbon Dioxide on Alkali Metal Exchanged Zeolites
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منابع مشابه
Carbon Dioxide Management in Spacecraft Atmospheres.
O NE OF THE methods currently being investigated for the regenerable removal of carbon dioxide from space vehicle atmospheres involves its adsorption on synthetic zeolites. These materials, known commercially as "molecular sieves" (Linde Company) or "microtraps" (Davison Chemical Company) are crystalline alumino silicates of alkali and alkaline earth metals. Synthetic zeolites being crystalline...
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When adsorbed (at a low temperature) on alkali-metal-exchanged zeolites, CO forms both M(CO) and M(OC) carbonyl species with the extra-framework alkali-metal cation of the zeolite. Both quantum chemical and experimental results show that C-bonded adducts are characterized by a C−O stretching IR band at a frequency higher than that of 2143 cm for free CO, while for O-bonded adducts this IR band ...
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The adsorption of CO(2) in Li-, Na-, and K-FER was investigated by a combination of volumetric adsorption experiments, FTIR spectroscopy, and density functional theory. Experimental isosteric heats of CO(2), Q(st), depend significantly on the cation size, cation concentration, and on the amount of adsorbed CO(2). The differences observed in experimentally determined isosteric heats were interpr...
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Monte Carlo simulations were employed to gain insight on HCN adsorption mechanism on LTA zeolites with different alkali metal cations, Li, Na, and K. Adsorption isotherms were calculated at four different temperatures at and above the normal boiling point of HCN. Results show that adsorption capacity depends on the type of the extraframework cation and Li-LTA showed the highest HCN adsorption c...
متن کاملFirst principles derived, transferable force fields for CO2 adsorption in Na-exchanged cationic zeolites.
The development of accurate force fields is vital for predicting adsorption in porous materials. Previously, we introduced a first principles-based transferable force field for CO2 adsorption in siliceous zeolites (Fang et al., J. Phys. Chem. C, 2012, 116, 10692). In this study, we extend our approach to CO2 adsorption in cationic zeolites which possess more complex structures. Na-exchanged zeo...
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