Chemical affinity-assisted H-2 isotope separation using Ca-rich onion-peel-derived nanoporous carbon composite
- Muhammad, Raeesh; Kim, Suhwan; Park, Jaewoo; Jung, Minji; Lee, Myoung Eun; Chung, Jaewoo; Jang, Haenam; Oh, Hyunchul
- Issue Date
- ROYAL SOC CHEMISTRY
- MATERIALS CHEMISTRY FRONTIERS, v.5, no.22, pp.8018 - 8024
- Journal Title
- MATERIALS CHEMISTRY FRONTIERS
- Start Page
- End Page
- Stable isotopes of hydrogen are a prerequisite for many industrial and scientific applications and require their ready supply on a large scale. Herein, we explore the chemical affinity-assisted separation of D-2 from a hydrogen isotopic mixture using calcium-rich porous carbon derived from onion peel. A sustainable physical activation using CO2 of onion-peel-derived carbon led to nanoporous carbon formation with a specific surface area of 433 m(2) g(-1) and a total pore volume of 0.27 cm(3) g(-1) along with a calcium composition of 17 wt% without using any calcium precursor. Calcium increases the chemical affinity of synthesized materials towards D-2, evidenced by the observation of a higher uptake for D-2 than H-2 in gas sorption and thermal desorption spectroscopy studies. Additionally, a promising D-2/H-2 selectivity of 5.6 at 40 K and a desorption energy difference of 2.31 kJ mol(-1) further support the higher binding strength for D-2, which endows its separation from the isotopic mixture. Hence, the current approach of using biowaste provides an environmentally friendly alternative for biowaste management in addition to a promising isotope separation candidate.
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- 융합기술공과대학 > Department of Energy Engineering > Journal Articles
- 건설환경공과대학 > 환경공학과 > Journal Articles
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