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Acta Phys. -Chim. Sin.  2004, Vol. 20 Issue (07): 684-689    DOI: 10.3866/PKU.WHXB20040704
Article     
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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Abstract  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.

Key wordsSeparation of N2 and Ar      4A      13X      LSX      Adsorption isotherm      Breakthrough curve     
Received: 02 December 2003      Published: 15 July 2004
Corresponding Authors: Xie You-Chang     E-mail: 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. Acta Phys. -Chim. Sin., 2004, 20(07): 684-689.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20040704     OR     http://www.whxb.pku.edu.cn/Y2004/V20/I07/684

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