Nanoporous materials for hydrogen isotope separation

Jan 13
13. January 2022 16:00 - 18:00
Hanns-Hofmann-Hörsaal (KS I, Cauerstr. 4)

Unless stated all talks at 16.15 in the Hanns-Hofmann-Hörsaal<> (KS I, Cauerstr. 4). Although attendance in presence is preferred, the talks will be streamed live on zoom. The link will be provided via email via the internal department mailing lists. If you have not received this information and would like to watch a talk, please contact the colloquium organizer.

One of the important operations in chemical industry is separation and purification of gaseous products. Especially H2/D2 isotope separation is a difficult task since its size, shape and thermodynamic properties resemble each other. Porous materials offer two different mechanisms for separating hydrogen isotopes, either confinement in small pores, i.e., “kinetic quantum sieving”, or adsorption on strong binding sites, i.e., “chemical affinity quantum sieving”. Recently, several new classes of nanoporous materials have been developed, which for the first time allow the exact tailoring of pore size and aperture as well as including open metal sites into the framework.

Experimentally, the measurement of the selectivity for hydrogen isotope separation is very challenging, since it requires low temperatures near the boiling point of the gases. Using low-temperature thermal desorption spectroscopy (TDS), we have developed a method for measuring directly the isotope selectivity after exposure to H2/D2 mixtures.

Exemplarily, this talk will demonstrate the potential of novel nanoporous materials for hydrogen isotope separation on experimental results for metal-organic frameworks (MOFs) and organic cage molecules. – collapse_4<>