Enhanced quantum sieving of hydrogen isotopes <i>via</i> molecular rearrangement of the adsorbed phase in chabazite
Bastien Radola, Igor Bezverkhyy, Jean-Marc Simon, J.M. Salazar, Mathieu Macaud, Jean‐Pierre Bellat
Abstract
Coadsorption experiments reveal an unexpected increase of the D2/H2 selectivity with loading in pure silica chabazite at 47 K. This effect is correlated with the appearance of a step in the adsorption isotherms of H2 and D2. Grand canonical Monte Carlo simulations show that this phenomenon is related to a molecular rearrangement of the adsorbed phase induced by its strong confinement. In the case of a H2 and D2 mixture, this rearrangement favors the adsorption of D2 having a smaller size due to quantum effects.
Topics & Concepts
ChabaziteAdsorptionChemistrySelectivityPhase (matter)HydrogenIsotopePhysical chemistryZeoliteInorganic chemistryCrystallographyOrganic chemistryPhysicsCatalysisQuantum mechanicsChemical Synthesis and CharacterizationHydrogen Storage and MaterialsAdvanced NMR Techniques and Applications