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The adsorption and textural properties of LSX zeolite after cation exchange both in LiCl and NH 4 Cl aqueous solutions have been evaluated from elemental analysis, XRD, N 2  adsorption at 77K, and CO 2  and N 2 O adsorption at 273K. Incorporation of Li +  and H +  results in a significant decrease of adsorption selectivity towards CO 2  in a pressure range 0.01 - 1 Torr compared to the initial LSX in the K-Na form. This feature allows simultaneous quantitative sequestration of CO 2  and N 2 O traces from contaminated gas flows, or can be useful for pre-concentration of these gases prior to catalytic utilization. Above 1 Torr adsorption selectivity rises to 1.0 for the unmodified LSX, but incorporation of Li+ and H+ increases it in the range 5 - 50 Torr, allowing adsorption purification of N 2 O from CO 2  diluted an in inert gas flow under the applied conditions.

Alteration of Adsorption Selectivity of LSX Zeolite in Li + and H + forms towards CO 2 and N 2 O