Developing an effective adsorbent for olefin/paraffin separation is a crucial and challenging issue. We have developed an olefin-selective adsorbent by loading two different Cu(II) salts (CuCl2 and Cu(CH3COO)2) within an iron-based metal–organic framework (MOF) and reduced them to Cu(I) species without a high-temperature calcination and an external reducing agent. The successful development of Cu(I)-loaded MOFs was confirmed by characterizations including scanning electron microscope/energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, powder X-ray diffraction, and Brunauer–Emmett–Teller analyses. From the comparisons between Cu(I)-loaded MOFs degassed at two different temperatures, we confirmed that the unsaturated Fe(II) sites within the iron-based MOF can enhance the stability of formed Cu(I) species and thus improve the C3H6/C3H8 selectivity. The resulted Cu(I)-loaded MOF shows large C3H6 uptake (5.15 mmol/g) and high C3H6/C3H8 selectivity (8.9) at 100 kPa and 293 K.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF‐2019R1A2C2002313). This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020K1A4A7A02095371).
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