Exploiting the Specific Isotope-Selective Adsorption of Metal–Organic Framework for Hydrogen Isotope SeparationClick to copy article linkArticle link copied!
- Raeesh MuhammadRaeesh MuhammadDepartment of Energy Engineering, Gyeongsang National University, Jinju 52725, Republic of KoreaMore by Raeesh Muhammad
- Seohyeon JeeSeohyeon JeeDepartment of Chemical and Biological Engineering, Sookmyung Women’s University, 100 Cheongpa-ro 47 gil, Yongsan-gu, Seoul 04310, Republic of KoreaMore by Seohyeon Jee
- Minji JungMinji JungDepartment of Energy Engineering, Gyeongsang National University, Jinju 52725, Republic of KoreaMore by Minji Jung
- Jaewoo ParkJaewoo ParkDepartment of Energy Engineering, Gyeongsang National University, Jinju 52725, Republic of KoreaMore by Jaewoo Park
- Sung Gu Kang*Sung Gu Kang*[email protected] (DFT calculations)School of Chemical Engineering, University of Ulsan, Ulsan 44610, Republic of KoreaMore by Sung Gu Kang
- Kyung Min Choi*Kyung Min Choi*[email protected] (material synthesis)Department of Chemical and Biological Engineering, Sookmyung Women’s University, 100 Cheongpa-ro 47 gil, Yongsan-gu, Seoul 04310, Republic of KoreaMore by Kyung Min Choi
- Hyunchul Oh*Hyunchul Oh*[email protected] (characterization)Department of Energy Engineering, Gyeongsang National University, Jinju 52725, Republic of KoreaFuture Convergence Technology Research Institute, Jinju 52725, Republic of KoreaMore by Hyunchul Oh
Abstract
Adsorptive separation using narrow-micropore adsorbents has demonstrated the potential to separate hydrogen isotopes. In this work, we employed an isotope-responsive separation using cobalt formate. A D2-responsive third sorption step was revealed, and consequently, a noticeable difference was observed in the uptakes of D2 and H2. This may have resulted from the additional space created for D2 due to its dense packing, as DFT calculations revealed that cobalt formate possesses 2.26 kJ/mol higher binding strength for D2 than for H2. The exploitation of this D2-responsive third sorption step renders a promising separation performance, with a D2/H2 selectivity of up to 44 at 25 K/1 bar. Lastly, cobalt formate was synthesized on a gram scale here, which makes it a prospect for commercialization.
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