Adsorption separation of heavier isotope gases in subnanometer carbon pores
- Shinshu Univ., Matsumoto, Nagano (Japan). Research Initiative for Supra-Materials
- Univ. of Pittsburgh, PA (United States). Dept. of Chemical and Petroleum Engineering
- Kanazawa Univ. (Japan). Inst. of Science and Engineering
- Curtin Univ., Perth, WA (Australia). Dept. of Physics and Astronomy
- Waseda Univ., Shinjuku (Japan). Research Organization for Nano and Life Innovation
- Shinshu Univ., Matsumoto, Nagano (Japan). Research Initiative for Supra-Materials; Carbon Science Centre of Excellence, State College, PA (United States). Morgan Advanced Materials
- Waseda Univ., Shinjuku (Japan). School of Advanced Science and Engineering
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (FBK-ECT*), Trento (Italy); Trento Institute for Fundamental Physics and Applications (TIFPA-INFN), Trento (Italy)
- Shinshu Univ., Matsumoto, Nagano (Japan). Research Initiative for Supra-Materials; Drexel Univ., Philadelphia, PA (United States). A. J. Drexel Nanotechnology Inst. Dept. of Material Science
Isotopes of heavier gases including carbon (13C/14C), nitrogen (13N), and oxygen (18O) are highly important because they can be substituted for naturally occurring atoms without significantly perturbing the biochemical properties of the radiolabelled parent molecules. These labelled molecules are employed in clinical radiopharmaceuticals, in studies of brain disease and as imaging probes for advanced medical imaging techniques such as positron-emission tomography (PET). Established distillation-based isotope gas separation methods have a separation factor (S) below 1.05 and incur very high operating costs due to high energy consumption and long processing times, highlighting the need for new separation technologies. Here, we show a rapid and highly selective adsorption-based separation of 18O2 from 16O2 with Sabove 60 using nanoporous adsorbents operating near the boiling point of methane (112 K), which is accessible through cryogenic liquefied-natural-gas technology. A collective-nuclear-quantum effect difference between the ordered 18O2 and 16O2 molecular assemblies confined in subnanometer pores can explain the observed equilibrium separation and is applicable to other isotopic gases.
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725; CBET1703266; ACI-1548562; TG-DMR110091; FT140100191
- OSTI ID:
- 1816768
- Journal Information:
- Nature Communications, Vol. 12, Issue 1; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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