Center for Catalytic Science and Technology, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, United States.
Langmuir. 2013 Jan 15;29(2):832-9. doi: 10.1021/la304138z. Epub 2012 Dec 31.
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.
采用 CO2 和 N2 的吸附等温线对经质子和碱金属阳离子（Li+、Na+ 和 K+）交换的高硅 SSZ-13 样品进行了研究。结果表明，Li-、Na-SSZ-13 在环境温度和压力下具有优异的 CO2 容量；通常，Li-SSZ-13 对 N2 的吸附容量最高，特别是在低压区对 CO2 的吸附容量最高。通过对吸附等温线和吸附热的分析，考察了阳离子类型和 Si/Al 比（6 和 12）对吸附性能的影响。在变压吸附和真空压力吸附过程中，对这些吸附剂在烟道气混合物中的 CO2 分离进行了评估。
