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  • Title: Carbon dioxide and nitrogen adsorption on cation-exchanged SSZ-13 zeolites.
    Author: Pham TD, Liu Q, Lobo RF.
    Journal: Langmuir; 2013 Jan 15; 29(2):832-9. PubMed ID: 23249267.
    Abstract:
    Samples of high-silica SSZ-13, ion exchanged with protons and alkali-metal cations Li(+), Na(+), and K(+), were investigated using adsorption isotherms of CO(2) and N(2). The results show that Li-, Na-SSZ-13 have excellent CO(2) capacity at ambient temperature and pressure; in general, Li-SSZ-13 shows the highest capacity for N(2), CO(2) particularly in the low-pressure region. The effect of cation type and Si/Al ratio (6 and 12) on the adsorption properties was investigated through analysis of adsorption isotherms and heats of adsorption. The separation of CO(2) in a flue gas mixture was evaluated for these adsorbents in the pressure swing adsorption and vacuum pressure adsorption processes.
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