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Related Concept Videos

Noble Gases02:54

Noble Gases

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The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.
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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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Nanoporous metal formates for krypton/xenon separation.

Keith V Lawler1, Zeric Hulvey, Paul M Forster

  • 1Department of Chemistry, University of Nevada, Las Vegas, NV 89154-4003, USA. Paul.Forster@unlv.edu.

Chemical Communications (Cambridge, England)
|October 18, 2013
PubMed
Summary

Metal(II) formates, including cobalt and nickel, exhibit superior xenon adsorption over krypton. This is due to size selectivity within the material

Area of Science:

  • Materials Science
  • Adsorption Science
  • Inorganic Chemistry

Background:

  • Metal formates are investigated for gas adsorption properties.
  • Understanding selective gas adsorption is crucial for separation technologies.
  • Xenon and krypton separation is relevant for nuclear applications.

Purpose of the Study:

  • To compare the adsorption enthalpies of xenon and krypton on Metal(II) formates.
  • To investigate the role of size selectivity in gas adsorption on these materials.

Main Methods:

  • Synthesis of Cobalt(II) formate and Nickel(II) formate.
  • Adsorption experiments measuring heat of adsorption for Xe and Kr.
  • Analysis of adsorption data across various loading conditions.

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Main Results:

  • Metal(II) formates (Co, Ni) demonstrate a significantly higher heat of adsorption for xenon compared to krypton.
  • This selectivity is observed consistently across all tested loading levels.
  • The primary adsorption site exhibits size selectivity, favoring the larger xenon atom.

Conclusions:

  • Metal(II) formates possess inherent size-selective properties for noble gas adsorption.
  • These materials show potential for selective xenon capture over krypton.
  • The findings highlight the importance of pore structure and size in adsorption-based separations.