Effects of confinement on the molar enthalpy of argon adsorption in graphitic cylindrical pores: A grand canonical Monte Carlo (GCMC) simulation study

► Integral molar enthalpy is a proper variable to describe heat of adsorption under supercritical conditions. ► The strong confinement results in higher heat of adsorption. ► The behaviour of surface excess in a cylinder under supercritical conditions is similar to that on a flat surface. ► Supercritical adsorption is a densification process reflected by the behaviour of layer compressibility.