Article

Switching Kr/Xe Selectivity with Temperature in a Metal–Organic Framework

Carlos A. FernandezEnergy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United StatesJian LiuEnergy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United StatesPraveen K. ThallapallyEnergy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United StatesDenis M. StrachanEnergy and Environment Directorate, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States

2012en

ABI

Abstract

Krypton (Kr) and xenon (Xe) adsorption on two partially fluorinated metal-organic frameworks (FMOFCu and FMOFZn) with different cavity size and topologies are reported. FMOFCu shows an inversion in sorption selectivity toward Kr at temperatures below 0 °C while FMOFZn does not. The 1D microtubes packed along the (101) direction connected through small bottleneck windows in FMOFCu appear to be the reason for this peculiar behavior. The FMOFCu shows an estimated Kr/Xe selectivity of 36 at 0.1 bar and 203 K.

Identifiers

DOI: 10.1021/ja302071t

Citations and references

Cited by 40 references

Metrics — AkademScholar