2019
DOI: 10.31349/revmexfis.65.190
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Time dependent self-diffusion coefficient of methane molecules confined into micropores structure of a sandstone

Abstract: In this work, the effect of pore structure of a sandstone on the molecular displacement of confined methane gas is analyzed. It was found that the self-diffusion coefficient of a methane molecule depends on the pore size distribution an their connectivity. In particular, the time dependent self-diffusion coefficient exhibits a maximum which is correlated with the effect of the molecular confinement. It was found that a sandstone with small pores and/or pores bad connected traps the gas more efficiently than ot… Show more

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