Microcalorimetric experiments showed the evolution
of the differential heat of adsorption with loading from which
effects derived of interaction with the micropore surface and the
volumetric capacity were both measured. Two behaviours were
characterised depending on whether the hydrocarbon molecules
adsorbed or not on specific centres. In what confinement effects
is concerned, it was established that hexane did not show specific
site adsorption, thus mimicking the kind of interaction described
by Derouane in the references [3–5], and within this conditions we
showed that the heat of adsorption was directly related to the pore
size [23]