title: Carbon dioxide and nitrogen adsorption on cation-exchanged SSZ-13 zeolites.
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.
authors.affiliation: Center for Catalytic Science and Technology, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States.
authors.forename: Trong D
authors.initials: TD
authors.lastname: Pham
authors.forename: Qingling
authors.initials: Q
authors.lastname: Liu
authors.forename: Raul F
authors.initials: RF
authors.lastname: Lobo