Investigation of nanoscale mechanism of unusual hydrogen isotope separation in MIL53 (Al) at elevated temperatures
The goal of this proposal is the development of materials for cost-efficient hydrogen isotope separation, which would enable high degree of separation at high operational temperatures. For this purpose, we use a novel strategy employing flexible nanoporous structures. Recently, we have discovered a breathing transition from large pore (lp) to very large pore (vlp) in well known flexible MOF MIL-53 (Al), which respond only to a heavier hydrogen isotope. As a results, the breathing transition in MIL-53, D2 in 1:1 H2/D2 mixture is adsorbed preferentially on MIL-53, leading to the high D2 selectivity even at high temperature. The aim of the proposed experiments is to investigate the nanoscale mechanism of the isotopic molecular transport within the framework during breathing transition using in-situ neutron spectroscopy. This investigation will provide a key information on diffusion of isotopes in flexible MOFs and hence on the nanoscale nature of the isotope separation. The results will serve as a guideline for further development of the next generation of materials using quantum sieving approach
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RUSSINA Margarita; GRZIMEK Veronika; JUNG Minji; OLLIVIER Jacques; J. T. Park and PARK JAEWOO. (2021). Investigation of nanoscale mechanism of unusual hydrogen isotope separation in MIL53 (Al) at elevated temperatures. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-05-541
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