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Facile Cu(I) Loading for Adsorptive C 3 H 6 / C 3 H 8 Separation Through Double Cu( II ) Salts Incorporation Within Pores With Unsaturated Fe( II ) Sites
Author(s) -
Han Hyug Hee,
Kim AhReum,
Kim TeaHoon,
Bae YounSang
Publication year - 2021
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.12225
Subject(s) - selectivity , calcination , x ray photoelectron spectroscopy , olefin fiber , adsorption , scanning electron microscope , metal , chemistry , metal organic framework , spectroscopy , nuclear chemistry , powder diffraction , analytical chemistry (journal) , materials science , crystallography , chemical engineering , chromatography , catalysis , organic chemistry , physics , quantum mechanics , engineering , composite material
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 (CuCl 2 and Cu(CH 3 COO) 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 C 3 H 6 /C 3 H 8 selectivity. The resulted Cu(I)‐loaded MOF shows large C 3 H 6 uptake (5.15 mmol/g) and high C 3 H 6 /C 3 H 8 selectivity (8.9) at 100 kPa and 293 K.