Simplified local density model for adsorption of pure gases on activated carbon using Sutherland and Kihara potentials

In this study, the ability of the simplified local density (SLD) model to represent adsorption of pure gases on activated carbon as predicted by Sutherland and Kihara potential functions is investigated. Peng–Robinson (PR) equation of state (EoS) is used in the SLD model to provide the fluid properties. In addition to the Lennard–Jones potential, which is usually used in literature, Sutherland and Kihara potentials are also used to represent interactions between gas and solid molecules. The parameters of the models were adjusted to the data from the literature. The results for the adsorption of methane, ethane, carbon dioxide and nitrogen on two types of activated carbon are compared. Accurate predictions are observed by the three potential function models.

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► The ability of the simplified local density (SLD) model to represent adsorption of pure gases on activated carbon as predicted by Sutherland and Kihara potential functions is investigated.
► Peng–Robinson (PR) equation of state (EoS) is used in the SLD model to provide the fluid properties.
► Sutherland and Kihara potentials have produced more accurate results in comparison to Lennard–Jones.