Effects of Mn+ ion exchange on the adsorptive separation property of LiX with N-2 and Ar
- 关莉莉
- 段连运
- 谢有畅
DOIAbstract
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 degrees C. The data demonstrate that the higher the Mn+ in the LiX is, the lower the adsorptive separation property of the zeolites with N-2 and Ar is. This is likely to be caused by the outflow of the Li+ locating at the active site for N-2 adsorption in the LiX. It is clear that LiX zeolite is the best adsorbent for separating N-2 and Ar among the a...
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