Journal
CHEMICAL ENGINEERING JOURNAL
Volume 339, Issue -, Pages 223-229Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.01.129
Keywords
Sulfur hexafluoride (SF6); Greenhouse gas; Metal-organic framework (MOF); Capture; Adsorption
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Funding
- Next Generation Carbon Upcycling Project through National Research Foundation (NRF) - Ministry of Science and ICT, Republic of Korea [2017M1A2A2043449]
- Technology Innovation Program - Ministry of Trade, Industry & Energy (MI, Korea) [10048649]
- National Research Foundation of Korea (NRF) - Korea Government (MSIP) [NRF-2017M2A8A5019344]
- Next Generation Carbon Upcycling Project through National Research Foundation (NRF) - Ministry of Science and ICT, Republic of Korea [2017M1A2A2043449]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10048649] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017M1A2A2043449] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We have systematically synthesized a series of functionalized UiO-66-X (X = NO2, NH2, Cl, Br, I, Br-2) 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-Br-2 with the highest polarizability exhibited a high Henry's constant (104 mmol g(-1) bar(-1)) for SF6 adsorption as well as high SF6/N-2 selectivity (200), both of which are considerably higher than those of other adsorbent materials, including MOFs. Moreover, UiO-66-Br-2 showed good SF6/N-2 separation under a dynamic mixture flow condition as well as facile regeneration without increasing the temperature. These results show that UiO-66-Br-2 is a potential adsorbent for the selective capture of SF6 from various SF6/N-2 mixtures in industry.
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