Hydrogen isotope separation on nickel-containing metal-organic framework@gama-alumina-based multicomponent composite packed column: Identification of individual role of each component

Rapid diffusion of H2 and strong adsorption of D2 in Ni-4PyC realized the efficient separation of H2/D2 by gas chromatography

“…S2f† shows the infrared spectra of Ni-4PyC, where the O–H stretching vibration band of crystal water appears at 3405 cm −1 . 48 The antisymmetric and symmetric stretching vibration bands of carboxylate COO − appear at 1645 and 1400 cm −1 , and the bands in the wavenumber range of 1200–1000 cm −1 belong to the carboxyl C–O stretching vibration. 49 The CC stretching vibration band in the benzene ring appears at 1542 cm −1 , and the band in the wavenumber range of 860–678 cm −1 belongs to the C–H bending vibration of the benzene ring.…”

“…The bands appearing at 792 and 590 cm −1 are attributed to the stretching vibration of AlO 6 46,47. Fig.S2f† shows the infrared spectra of Ni-4PyC, where the O-H stretching vibration band of crystal water appears at 3405 cm −1 48. The antisymmetric and symmetric stretching vibration bands of carboxylate COO − appear at 1645 and 1400 cm −1 , and the bands in the wavenumber range of 1200-1000 cm −1 belong to the carboxyl C-O stretching vibration 49.…”

H2/D2 Separation Using UTSA-16@CAU-10-H@γ-AlOOH Composites as the Stationary Phase in Gas Chromatography via the Additive Effects of Kinetic Sieving and Chemical Affinity Quantum Sieving

“…As an important method for the separation of hydrogen isotopes, gas chromatography has received extensive attention. ,,,− For the separation of hydrogen isotopes by gas chromatography, the most important aspect is the choice and design of the stationary phase. The stationary phase needs to have a suitable adsorption capacity for hydrogen isotopes, which can not only realize the separation of H 2 /D 2 through the difference of adsorption but also enable the rapid desorption of hydrogen isotopes from the system.…”

“…8,38 On the other hand, when MOFs are directly used as the stationary phase for gas chromatography, there is a large gas resistance problem. Therefore, in our previous work, the MOFs with the kinetic sieving effect or the CAQS effect for the separation of hydrogen isotopes were loaded on the γ-Al 2 O 3 carrier to obtain MOFs@γ-Al 2 O 3 composite materials 28,29,36,37 as the chromatographic stationary phase to achieve the separation of H 2 /D 2 in 77 K.…”

“…However, the MOFs reported in the literature have strong adsorption capacity for hydrogen isotopes; when using gas chromatography to separate hydrogen isotopes, the separation time is relatively long, and the mechanism explanation is not clear enough. , On the other hand, when MOFs are directly used as the stationary phase for gas chromatography, there is a large gas resistance problem. Therefore, in our previous work, the MOFs with the kinetic sieving effect or the CAQS effect for the separation of hydrogen isotopes were loaded on the γ-Al 2 O 3 carrier to obtain MOFs@γ-Al 2 O 3 composite materials ,,, as the chromatographic stationary phase to achieve the separation of H 2 /D 2 in 77 K.…”