Search results for "isotope quantum sieving"

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D2 and H2 adsorption capacity and selectivity in CHA zeolites: Effect of Si/Al ratio, cationic composition and temperature

2020

International audience; The work deals with the effect of composition of CHA zeolites on the adsorption and separation of H2 and D2 under cryogenic temperatures. In the first part of this work the effect of Si/Al ratio and cationic composition on single gas adsorption of H2 and D2 was studied at 77.4 K. It was found that the adsorption capacities increase with Al content up to Si/Al = 2.1. Unexpectedly, Na-CHA zeolite with the highest Al content (Si/Al = 1.1) adsorbs only negligible amount because of the collapse of the zeolite structure upon dehydration at 400°C. The Na-and Li-containing chabazites with Si/Al = 2.1 possess similar adsorption capacities. In contrast, progressive replacement…

Work (thermodynamics)ChabaziteMaterials scienceH2-D2 separationAnalytical chemistryH2-D2 coadsorption02 engineering and technology010402 general chemistry01 natural sciencesAdsorptionisotope quantum sievingmedicineGeneral Materials ScienceDehydrationZeoliteCationic polymerizationGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter Physicsmedicine.disease0104 chemical sciences[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistryMechanics of MaterialschabaziteComposition (visual arts)0210 nano-technologySelectivityMicroporous and Mesoporous Materials
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