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Publication - Dr Valeska Ting

    Novel low energy hydrogen–deuterium isotope breakthrough separation using a trapdoor zeolite

    Citation

    Physick, AJW, Wales, DJ, Owens, SHR, Shang, J, Webley, PA, Mays, TJ & Ting, VP, 2016, ‘Novel low energy hydrogen–deuterium isotope breakthrough separation using a trapdoor zeolite’. Chemical Engineering Journal, vol 288., pp. 161-168

    Abstract

    Cs-chabazite, a type of zeolite with caesium counter-cations, possesses
    interesting gas separation properties due to a highly selective
    molecular “trapdoor” effect. Herein the use of this material for H2/D2
    isotope separation is demonstrated. Isotope separation was achieved
    using breakthrough separation with a single pass through a packed bed at
    moderate temperatures (293 K) and pressures (0.17 MPa) when one species
    was in a sufficiently low concentration. The breakthrough separation
    curves were successfully modelled using the Thomas kinetic breakthrough
    model and the Yoon and Nelson kinetic breakthrough model, where working
    transferable kinetic rate constants were developed. Use of this material
    for hydrogen isotope separation would significantly lower the total
    energy demand compared with current hydrogen isotope separation
    techniques such as cryogenic distillation and is applicable to
    separating out low concentrations of D2 (0.0156%) present in standard grade H2.

    Full details in the University publications repository