Tailoring Zeolite ERI Aperture for Efficient Separation of CO2 from Gas Mixtures
Tailoring Zeolite ERI Aperture for Efficient Separation of CO2 from Gas Mixtures
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DOI：
10.1016/j.seppur.2022.123078
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Lei Wang
中科院分区：
文献类型：
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作者：
Jingyun Qian;Wenna Zhang;Xue Yang;Kexin Yan;Meikun Shen;Hongyue Pan;Hongjun Zhu;Lei Wang
Constructing the metal cation-mediated low-cost inorganic sorbent with high separation efficiency in CO2, N2, and CH4 remains a major challenge. Herein, we developed a series of alkali metal cations (Na+, K+, Rb+, Cs+)-exchanged ERI zeolites and adopted in the separation process of CO2 among the gas mixture. Among the ion-exchanged zeolites, the zeolite K-ERI showed a high adsorption volume of 70.84 cm3g-1 and an IAST selectivity of CO2/CH4: 6254, CO2/N2: 2872 at 298K, respectively, far outweighed the reported metal cation exchanged zeolites. Combining powder X-ray diffraction crystallography and density functional theory calculations, we unequivocally unveiled that the metal cations located at s8r effectively tailored zeolite aperture, and metal cation-gas molecules interactions synergically restrained the pass-through capacity of CO2 in ion-exchanged ERI framework. Such a unique host-guest interaction governed by metal cations in aluminosilicate zeolite ERI affords a general strategy for gas separation.
