화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.84, 179-184, April, 2020
DOI10.1016/j.jiec.2019.12.032  Export Citation
Efficient SF6/N2 separation at high pressures using a zirconium-based mesoporous metal?organic framework
Min-Bum Kim1, 2, Tea-Hoon Kim1, Tae-Ung Yoon1, Jo Hong Kang1, 3, Jeong-Hoon Kim4, and Youn-Sang Bae1, †
  • 1Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
  • 2Physical and Computational Science Directorate, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352, United States, Korea
  • 3Green Materials & Processes R&D Group, Korea Institute of Industrial Technology, 55 Jongga-ro, Jung-gu, Ulsan, 44413, Republic of Korea
  • 4Greenhouse Gas Separation and Recovery Group, C1 Separation & Conversion Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea
E-mail:
Adsorptive separation of SF6/N2 mixtures is an important issue since SF6 is a significant greenhouse gas. Although separation performances should be evaluated under high pressure conditions to find an efficient adsorbent candidate for pressure swing adsorption (PSA) processes, no studies on metal?organic frameworks (MOFs) have focused on SF6/N2 separation at high pressures above 1 bar. In this study, we evaluated the potential of three hydrothermally stable adsorbents, including two MOFs (UiO-66 and UiO-67) and zeolite-13X, for SF6/N2 separation under normal PSA operation pressures (∼10 bar). Interestingly, UiO-67 with a high surface area and large pore size exhibited very high SF6/N2 selectivity (30∼37) at 10 bar as well as a significantly large SF6 working capacity (5.94 mmol g-1) between 10 bar and 1 bar. Moreover, UiO-67 showed facile regeneration at the ambient temperature as well as good cyclic adsorption and desorption behavior during 20 cycles. These results show that UiO-67 is a potential adsorbent for adsorptive SF6/N2 separation.
Keywords:Sulfur hexafluoride (SF6);Greenhouse gas;Metal?organic framework (MOF);Adsorption;Pressure swing adsorption (PSA)
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