Balancing uptake and selectivity in a copper-based metal–organic framework for xenon and krypton separation

Reticular Chemistry in Pore Engineering of a Y-Based Metal–Organic Framework for Xenon/Krypton Separation

“…29 To date, pore functionalization and pore tuning are two powerful approaches to increasing the separation selectivity between Xe and Kr. 21,30−33 Recently, Xe/Kr adsorption separation with high Xe capacity and good Xe/Kr separation selectivity has been reported by two MOFs (MOF-11 29 and ZJU-74a 27 ) due to their ultramicroporous sizes and high density of open metal sites. In particular, the Xe capacity at low pressure is remarkably enhanced for ZJU-C2 constructed by the polycycloalkane dicarboxylate ligand with aliphatic chemical environments inside the framework pores.…”

“…Physisorption-based separation in porous materials has attracted extensive interest from both the academic and industrial communities due to their great potential to mitigate the high energy consumption associated with chemical-based separations. , With extensive sorption studies using porous materials, ,− the microporous nature has been highly beneficial for various gas separations, including Xe/Kr separation. In particular, metal–organic frameworks (MOFs) present great potential due to their rational designability and ease of tunability over pore size/shape and pore chemistry. − While several MOF-based materials have been designed and applied for Xe/Kr separation, the realization of a practically efficient separation performance still remains a daunting challenge. Given that Xe and Kr molecules do not have dipole and quadrupole moments, their separation can be achieved, theoretically, by exploiting the differences in their kinetic diameter (Xe 4.047 Å and Kr 3.655 Å) and polarizability (40.4 × 10 25 and 24.8 × 10 25 cm –3 for Xe and Kr) .…”

“…Given that Xe and Kr molecules do not have dipole and quadrupole moments, their separation can be achieved, theoretically, by exploiting the differences in their kinetic diameter (Xe 4.047 Å and Kr 3.655 Å) and polarizability (40.4 × 10 25 and 24.8 × 10 25 cm –3 for Xe and Kr) . To date, pore functionalization and pore tuning are two powerful approaches to increasing the separation selectivity between Xe and Kr. ,− Recently, Xe/Kr adsorption separation with high Xe capacity and good Xe/Kr separation selectivity has been reported by two MOFs (MOF-11 and ZJU-74a) due to their ultramicroporous sizes and high density of open metal sites. In particular, the Xe capacity at low pressure is remarkably enhanced for ZJU-C2 constructed by the polycycloalkane dicarboxylate ligand with aliphatic chemical environments inside the framework pores …”

“…In particular, metal–organic frameworks (MOFs) present great potential due to their rational designability and ease of tunability over pore size/shape and pore chemistry. − While several MOF-based materials have been designed and applied for Xe/Kr separation, the realization of a practically efficient separation performance still remains a daunting challenge. Given that Xe and Kr molecules do not have dipole and quadrupole moments, their separation can be achieved, theoretically, by exploiting the differences in their kinetic diameter (Xe 4.047 Å and Kr 3.655 Å) and polarizability (40.4 × 10 25 and 24.8 × 10 25 cm –3 for Xe and Kr) . To date, pore functionalization and pore tuning are two powerful approaches to increasing the separation selectivity between Xe and Kr. ,− Recently, Xe/Kr adsorption separation with high Xe capacity and good Xe/Kr separation selectivity has been reported by two MOFs (MOF-11 and ZJU-74a) due to their ultramicroporous sizes and high density of open metal sites.…”

Cu-ATC vs. Cu-BTC: comparing the H2 adsorption mechanism through experiment, molecular simulation, and inelastic neutron scattering studies

“…29 Previous experimental and theoretical studies have shown that Cu-ATC displays promising potential for various gas adsorption and separation applications. 28,30–32…”