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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2004,Vol.20>> Issue(07)>> 684-689     doi: 10.3866/PKU.WHXB20040704         中文摘要
The Adsorptive Separation of N2 and Ar by Some Zeolites Highly Exchanged with Li
Guan Li-Li;Duan Lian-Yun;Xie You-Chang
State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Physical Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871
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The 4A,13X and LSX zeolites were ion exchanged with Li+ repeatedly in water solution, then the adsorption isotherms and breakthrough curves of these zeolites were measured at 25 ℃.The data demonstrate that 4A,13X and LSX highly ion-exchanged with Li+ have higher adsorption capacity and better adsorption selectivity for N2 over Ar. It is clear that the highly Li+ exchanged zeolites are good adsorbents for separation of N2 and Ar. From breakthrough curves we know that the zeolites near completely exchanged with Li+ have a suitable pressure for the adsorption separation of N2 and Ar. In the pressure range we studied, the best pressure is about 0.6 MPa. Comparing with the data from the breakthrough curves of the three highly Li+ exchanged zeolites we conclude that highly Li+ exchanged LSX has better properties for the separation of N2 and Ar than the other two zeolites.

Keywords: Separation of N2 and Ar   4A   13X   LSX   Adsorption isotherm   Breakthrough curve  
Received: 2003-12-02 Accepted: 2004-01-19 Publication Date (Web): 2004-07-15
Corresponding Authors: Xie You-Chang Email: yxie@pku.edu.cn


Cite this article: Guan Li-Li;Duan Lian-Yun;Xie You-Chang. The Adsorptive Separation of N2 and Ar by Some Zeolites Highly Exchanged with Li[J]. Acta Phys. -Chim. Sin., 2004,20 (07): 684-689.    doi: 10.3866/PKU.WHXB20040704
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