Equilibrium isotherm and mass transfer coefficient for adsorption of pure argon on small particles of pelletized lithium-exchanged low silica X zeolite

New experimental data are reported for equilibrium adsorption isotherm and mass transfer of pure argon on a sample of pelletized lithium-exchanged low silica X (LiLSX) zeolite. Model analysis of the data indicate that the zeolite behaved like a nearly homogeneous adsorbent for Ar adsorption while it exhibited substantial heterogeneity for adsorption of N₂ and milder heterogeneity for adsorption of O₂. The overall mass transfer coefficient for Ar adsorption was comparable in magnitude with those of N₂ and O₂. The coefficient increased with increasing pressure and decreased with increasing temperature like those for N₂ and O₂. A large skin resistance at the adsorbent particle surface was observed for Ar mass transfer like that for adsorption of O₂ and N₂.