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• W3208783415 abstract "Hydrogen isotopes are the main fuel in the fusion reactor, and the separation of hydrogen isotope gas mixture is the key process for the operation of fusion reactor. Cryogenic gas chromatography is an effective method which can be used for both separation and analysis of hydrogen isotopes. The chromatographic stationary phase determines the hydrogen isotopes separation performance. In this study, a series of pillared-layer MOFs Ni 2 (L) 2 (dabco) (H 2 L: 1,4-benzenedicarboxylic acid (H 2 bdc), 1,4-naphthalenedicarboxylic acid (H 2 ndc), 9,10-anthracenedicarboxylic acid (H 2 adc); dabco: 1,4-diazabicyclo-[2.2.2]octane) were synthesized by changing the bridging dicarboxylate ligands with different steric hindrance. The effect of MOFs structure on hydrogen isotope interaction strength was studied by isothermal adsorption experiments of pure H 2 and D 2 at 77 K and 87 K, and programmed temperature desorption experiments of H 2 -D 2 mixture from 25 K to 120 K. The enrichment factor for D 2 over H 2 up to 6.8 was obtained for Ni 2 (adc) 2 (dabco) by static adsorption experiment of H 2 -D 2 mixture. Finally, the MOFs composites Ni 2 (L) 2 (dabco)@γ-Al 2 O 3 were obtained by in situ solvothermal reaction loading MOFs on γ-Al 2 O 3 , and cryogenic gas chromatographic separation performance of H 2 -D 2 and H 2 -HD-D 2 mixtures using three composites-packed columns at liquid nitrogen temperature was investigated. The optimum separation was achieved when Ni 2 (adc) 2 (dabco)@γ-Al 2 O 3 was used as stationary phase due to strongest interaction strength with hydrogen isotope. The separation resolution R (H 2 /HD) and R (HD/D 2 ) is up to 1.31 and 3.26 respectively. • A series of pillared-layer MOFs were synthesized by changing the bridging dicarboxylate ligands. • The effect of MOFs structure on hydrogen isotope interaction strength was studied. • Composites Ni 2 (L) 2 (dabco)@γ-Al 2 O 3 is used for chromatographic separation of hydrogen isotopes. • Ni 2 (adc) 2 (dabco)@γ-Al 2 O 3 showed the optimum R (H 2 /HD) and R (HD/D 2 ), up to 1.31 and 3.26 respectively." @default.
• W3208783415 created "2021-11-08" @default.
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• W3208783415 date "2022-01-01" @default.
• W3208783415 modified "2023-10-17" @default.
• W3208783415 title "Cryogenic gas chromatographic separation of hydrogen isotopes using pillared-layer MOFs composites as stationary phase" @default.
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• W3208783415 doi "https://doi.org/10.1016/j.ijhydene.2021.10.039" @default.
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