Jump to main content
Jump to site search


A microporous metal-oragnic framework with commensurate adsorption and highly selective separation of xenon

Abstract

Separation of xenon (Xe) and krypton (Kr) becomes increasingly important due to the industrial significance of high-purity Xe gas and the concern with reprocessing radioactive isotopes of Xe and Kr from off-gas of used nuclear fuel in parts per million concentrations. Current separation processes mainly rely on energy and capital intensive cryogenic distillation. Thus, more economical and energy-efficient alternatives, such as physisorptive separation, using porous materials are needed to be developed. Herein, we present that a mircoporous metal-organic frameworks (MOF-Cu-H) in which the suitable pore/cage structure with a precise size match xenon atom, leading to its commensurate adsorption phenomenon of Xe near ambient conditions and superior performance for Xe capture and separation. MOF-Cu-H exhibits by far the highest Xe Henry coefficient, remarkable Xe/Kr selectivity and significant high Xe adsorption capacity at very low partial pressures relevant to nuclear fuel reprocessing. Temperature dependent isotherms, adsorption kinetics experiments, single column breakthrough curves and molecular simulation studies collaboratively support the claim, underlying the potential of this material for energy and cost effective removal of Xenon from nuclear fuel reprocessing plants compared with cryogenic distillation.

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Dec 2017, accepted on 07 Feb 2018 and first published on 07 Feb 2018


Article type: Paper
DOI: 10.1039/C7TA11321H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
  •   Request permissions

    A microporous metal-oragnic framework with commensurate adsorption and highly selective separation of xenon

    B. Chen, S. Xiong, Y. Gong, S. Hu, X. Wu, W. Li, Y. He and X. Wang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C7TA11321H

Search articles by author

Spotlight

Advertisements