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APS » Journals » Phys. Rev. Lett. » Volume 82 » Issue 5
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Phys. Rev. Lett. 82, 956–959 (1999)

Quantum Sieving in Carbon Nanotubes and Zeolites

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Qinyu Wang1, Sivakumar R. Challa1, David S. Sholl2, and J. Karl Johnson1,*
1Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
2Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213

Received 30 September 1998; published in the issue dated 1 February 1999

See accompanying Physics Focus

Fluids adsorbed in microporous materials can exhibit quantum sieving, where heavy isotopes are preferentially adsorbed over light isotopes. We present the first detailed predictions of quantum sieving based on realistic models of microporous materials. Carbon nanotubes, and the interstices of nanotube bundles, can act as highly effective quantum sieves for hydrogen isotopes. Quantum sieving of He and Ne in the zeolite AlPO4-22 is also discussed.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.956
DOI:
10.1103/PhysRevLett.82.956
PACS:
64.75.+g, 05.30.-d, 67.70.+n, 82.60.Lf

*Author to whom correspondence should be addressed. Email: karlj+@pitt.edu

 
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