Though the integral in Eq. ( ) can be resolved analytically, the complexity of the result makes it worth while to deal with it numerically. Eq. ( ) was employed to describe results of CO 2 gas within a (40, 40) carbon nanotube as reported by Skoulidas et al. the results of which are discussed below. The LJ parameters from Reference , along with the Lorentz-Berthelot mixing rules, were used to estimate the parameters for the CO 2 -carbon interaction.