Abstract
The differential heat of adsorption of Ar, O 2 , and N 2 on slit-shaped graphitic nanospace was calculated by grand canonical Monte Carlo (GCMC) simulation. The average kinetic energy of the adsorbed molecules was obtained by the difference between the potential minimum and the differential heat of adsorption. The slit width which provided minimum kinetic energy for adsorbed molecule was 1.6-1.7 times larger than each molecular diameter. The minimums of average kinetic energy were 0.440, 0.443, and 0.435 kJ mol −1 for Ar, O 2 , and N 2 , respectively. They correspond to lower temperature than ambient temperature. This phenomenon can be called "cooling effect" for the adsorbed molecule, and this effect corresponds to molecular sieve effect.
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