One-dimensional xenon gas in the pores of mordenite

Abstract

Xenon atoms in the pores of mordenite have been approximated by the hard-rod model, with an effective diameter. To investigate the adsorption isotherm and the density profile of xenon gas in the mordenite pores, the exact statistical results obtained from the hard-rod system have been used. The results have been compared with the available experimental data. For the adsorption isotherms of xenon gas, the calculated results are in good agreement with these experimental data. The temperature dependence for the density profiles of xenon atoms in the mordenite pores have also been investigated. The calculated results show an immobile adsorption at lower temperatures, in contrast to a mobile absorption at higher temperatures, and suggest a deviation from a strict-one-dimensionality of xenon gas in the mordenite pores at low temperature and high coverage.