Highly selective adsorption of SF6 over N2 in a bromine-functionalized zirconium-based metal-organic framework

Min Bum Kim, Kyung Min Kim, Tea Hoon Kim, Tae Ung Yoon, Eun Jung Kim, Jeong Hoon Kim, Youn Sang Bae

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9 Citations (Scopus)

Abstract

We have systematically synthesized a series of functionalized UiO-66-X (X = NO2, NH2, Cl, Br, I, Br2) compounds to further improve the selective SF6 adsorption of UiO-66, which is one of the best-performing adsorbents, and to investigate the effect of the polarizability of adsorbent atoms on the SF6 and CF4 adsorption, especially at low pressures, which is the industrially relevant condition. UiO-66-Br2 with the highest polarizability exhibited a high Henry's constant (104 mmol g−1 bar−1) for SF6 adsorption as well as high SF6/N2 selectivity (2 0 0), both of which are considerably higher than those of other adsorbent materials, including MOFs. Moreover, UiO-66-Br2 showed good SF6/N2 separation under a dynamic mixture flow condition as well as facile regeneration without increasing the temperature. These results show that UiO-66-Br2 is a potential adsorbent for the selective capture of SF6 from various SF6/N2 mixtures in industry.

Original languageEnglish
Pages (from-to)223-229
Number of pages7
JournalChemical Engineering Journal
Volume339
DOIs
Publication statusPublished - 2018 May 1

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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