采用水溶液离子交换法制备了锂离子和其它多价阳离子混合交换的13X分子筛,并 测定了这些二元离子交换分子筛在25℃下的氮和氩的吸附等温线.研究发现,经二元离子交 换的MgLiX、znLix、NiLiX和LaLiX分子筛对氮的吸附能力和对氮氩的吸附分离能力都 低于Lix分子筛,且随着多价离子在分子筛中的含量增加,分子筛的氮氩分离性能变差.说明 在LiX和实验所制得的各种二元离子交换的分子筛中,LiX分子筛仍是最好的氮氩分离吸附剂.
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 thid paper.
参考文献
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