Effects of M~(n+) Ion Exchange on the Adsorptive Separation Property of LiX with N_2 and Ar

The LiX with nearly 100% Li+ was ion exchanged with different Mn+ (Mg2+, Zn2+, Ni2+ and La3+) in water solution, then the adsorption isotherms of these zeolites were measured at 25℃. The data demonstrate that the higher the Mn+ in the LiX is, the lower the adsorptive separation property of the zeolites with N2 and Ar is. This is likely to be caused by the outflow of the Li+ locating at the active site for N2 adsorption in the LiX. It is clear that LiX zeolite is the best adsorbent for separating N2 and Ar among the adsorbents studied in this paper.