An expression for the net potential acting on a CO 2 molecule, within the pore interior due to the pore wall, is derived here. This result indicates the presence of a circumferential region of low potential the minimum of which exceeds the mean translational kinetic energy for the gaseous particles at the temperature in question. This acts to form the first high density layer in the outermost radial region of the pore. With the character of this net potential known, we are able to derive an expression for estimating the maximum pressure that can be obtained in the first primary layer before a significant amount of particles begin to exit the region. Given a pore of sufficient size, we propose that after the filling of the outermost low potential band this layer then generates another weaker circumferential low potential band further within the pore interior thus creating a secondary layer. This process can then be repeated.