Determination of effective diffusion coefficient of methane adsorption on activated carbon

Author(s): Alireza Azimi, Masoomeh Mirzaei

Experimental data of adsorption of methane on two types of microporous activated carbon with different pore volume carried out at pressure up to 35 bar and ambient temperature.Adsorption equilibriumand kinetics data at high pressure were measured using volumetric method. Parameters of Longmuir equilibrium relation and effective diffusion coefficient were calculated fromexperimental data. The theoreticalmodelwas solved using themeasured equilibriumdata and diffusion coefficient as input parameters. A good agreement was observed between experimental data and modeling results. Storage capacity of activated carbons with high micropore volume was higher but diffusion coefficient and adsorption rate was lower than carbons with lowmicropore volume.

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