In this report, we demonstrate how a simple analytic model can be used to obtain insight into the nature of the gaseous CO 2 density distribution within a carbon nanotube. Typically, these results must be obtained via computer modeling either by MD or Monte Carlo methods. By considering the LJ potential inside the tube, due to the atoms on the curved wall surface, an expression is arrived at that involves the tube radius and the LJ parameters. This resulting layer potential, valid for any region within the cross-section plane, ends up being only a function of the radial coordinate due to the symmetric nature of a cylindrical nanopore.