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Citation: 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 Physico-Chimica Sinica, ;2004, 20(07): 684-689. doi: 10.3866/PKU.WHXB20040704 shu

The Adsorptive Separation of N2 and Ar by Some Zeolites Highly Exchanged with Li^＋

1.
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

Received Date: 2 December 2003
Available Online: 15 July 2004

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 od 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.
- Separation of N2 and Ar;4A;13X;LSX;Adsorption isotherm;Breakthrough curve
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沈阳化工大学材料科学与工程学院沈阳 110142

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The Adsorptive Separation of N2 and Ar by Some Zeolites Highly Exchanged with Li^＋