Abstract
Simulation studies predicted an orientational ordering transition of the molecular axis of supercritical CO2, inside individual graphite pores, with size of the order of few molecular diameters. Study of the diffusion equation over a real porous medium, showed significant influence of the transition on the adsorbate diffusivity. Measured permeability of CO2 adsorbed in a nanoporous carbon membrane, confirmed the simulation results by exhibiting unusually high permeability values in the vicinity of the transition, and elucidated the significance of the thermodynamics in the study of the kinetic properties of the adsorbed phase.
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