Some structural characteristics of microporous carbons deduced from adsorption and diffusion data

Abstract

The pore structures of two microporous carbons have been studied using nitrogen, oxygen and carbon dioxide sorption and diffusion data tested against a simple model of porosity. By assuming a slit-like pore system between graphite planes and with the help of a 6–12 Lennard-Jones potential integrated over a single continuous basal plane of graphite, one can have access to two characteristic dimensions: the minimum pore width in the adsorption zone (7–8 Å) and the size of the constrictions leading to the pore (5.2–5.6 Å).