Contribution to the evaluation of density of methane adsorbed on activated carbon

Article Abstract:

The adsorption isotherms of N(sub 2) at -196 degree C, CO(sub 2) at 0 degree C, and CH(sub 4) at 25 degree C on 35 activated carbons with a wide range of micropore volumes and pore size distributions were compared to evaluate the density of adsorbed methane. The result indicate that methane is adsorbed in the micropores of the activated carbon with a density that is a function of the carbon porosity because methane is packed more compactly in narrow than in wide micropores.

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Competitive adsorption of NO, NO2 and CO2 and H2O on BaO(100): A quantum chemical study

Article Abstract:

Density functional theory (DFT) quantum chemical calculations are used to determine adsorption energies and geometries of NO, NO2, CO2 and H2O on a barium oxide (100) surface. The results indicate that carbon dioxide plays an essential role in the surface processes during N[O.sub.x] storage on BaO, where it could block a large part of available surface sites.

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Water adsorption on activated carbons: study of water adsorption in micro- and mesopores

Article Abstract:

A study is conducted to analyze the role of surface groups by subjecting the activated carbons (ACs) to controlled oxidation treatments. The adsorption process was analyzed by interpreting the nitrogen isotherms systematically measured on samples of different pore structure with progressively increasing amounts of preadsorbed water up to saturation.

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