Our experiments on hydrogen sorption in nanoporous activated carbon materials on TOSCA (RB1210041) previously revealed surprising behavior of supercritical hydrogen adsorbed into the pores of a microporous carbon material; specifically, a spectral fingerprint consistent with solid-like density of H2 at temperatures far above the critical point of H2. This 14.7 meV feature was not able to be discerned for subsequent measurement of a metal-organic framework material (MIL-101 ¿ RB1210310) due to the heterogeneity of the adsorption sites in this more complex material. In this experiment we intend to demonstrate that this pseudo-condensation effect is a general adsorption phenomenon by demonstrating that is can also be seen for other carbon nanomaterials H2 storage materials. In addition, we will test the hypothesis that this is more pronounced in materials of optimal pore size (~7A).