Ion Modification and Oxygen-argon Adsorption Separation Performance of Li-LSX Molecular Sieves
YANG Fubang1,2,†, DENG Cheng2,†, DENG Yu1, MA Jun2, LIU Shengjun2, ZHU Mengfu2
1 College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457 2 Institute of Medical Support Technology, Academy of Military Sciences PLA, Tianjin 300161
Abstract: Aiming at exploring the effect of modified Li-LSX molecular sieves with diverse valence cation on their oxygen-argon adsorption and separation performance, aqueous solution ion exchange process was employed to prepare AgLi-LSX, CaLi-LSX and CeLi-LSX molecular sieves, with Ag+, Ca2+ and Ce3+ as cationic exchange agents, respectively. Then, the framework structure, crystal configuration, element content and pore structure of the modified molecular sieves were characterized by SEM, TEM, FT-IR, XRD, EDS, Raman and BET technique, and the oxygen-argon adsorption and separation performance of the modified molecular sieves were measured as well. The results indicated that the modified molecular sieves held the same framework structure and crystal configuration with the original molecular sieve, still showing X type. The adsorption amounts of the modified sieves on the oxygen and argon were measured under 25 ℃. As could be seen from the results, CeLi-LSX, CaLi-LSX, AgLi-LSX molecular sieves showed the oxygen adsorption amounts of 4.978 6 mL·g-1, 4.042 7 mL·g-1, 2.975 5 mL·g-1, respectively, and similar argon adsorption ability. It can be concluded that CeLi-LSX molecular sieve is a favorable materials for oxygen-argon adsorption and separation.
杨富帮, 邓橙, 邓宇, 马军, 刘圣军, 朱孟府. Li-LSX分子筛的离子改性及氧氩吸附分离性能[J]. 材料导报, 2019, 33(24): 4051-4055.
YANG Fubang, DENG Cheng, DENG Yu, MA Jun, LIU Shengjun, ZHU Mengfu. Ion Modification and Oxygen-argon Adsorption Separation Performance of Li-LSX Molecular Sieves. Materials Reports, 2019, 33(24): 4051-4055.
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2019, Vol. 33 
