1. Selectively enriching accessible quantum sieving sites in two‐dimensional carbons for D2/H2 kinetic separation.
- Author
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Wang, Yong‐Sheng, Li, Tian‐Yi, Zheng, Zhe, Wang, Miao, Zhang, Meng‐Yao, Ba, Ya‐Qi, Hao, Guang‐Ping, and Lu, An‐Hui
- Subjects
ISOTOPE separation ,HYDROGEN isotopes ,NUCLEAR fusion ,MOLECULAR sieves ,CARBON-based materials - Abstract
Separation of hydrogen isotopes (D2/H2) attracts wide interest due to its important applications, such as nuclear fusion. Kinetic quantum sieving‐induced separation over tailored nanoporous solids is a promising method; however, the dynamic separation often shows a transient feature, thus a low D2/H2 selectivity even at temperature below 50 K. Herein, we selectively enriched the accessible quantum sieving (AQS) sites in two‐dimensional carbons by chemically growing a pore‐narrowing layer. The spatial density of such AQS sites is 8.5 times higher than that of commercial carbon molecular sieves. The kinetic selectivity of D2/H2 reached 4.6 at 77 K. Column breakthrough experiments revealed that the dynamic D2/H2 separation was enhanced by such a nanopore design. Aspen simulation indicated that D2 was enriched to 93.1% within 11 pressure swing adsorption cycles with a 1% D2/99% H2 mixture as feed. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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