QIAO Zhiwei, YANG Rendang, WANG Haihui, et al. Molecular design of metal-organic frameworks with different metal ligands for bio-methane separation[J]. CIESC Journal, 2014, (5).
QIAO Zhiwei, YANG Rendang, WANG Haihui, et al. Molecular design of metal-organic frameworks with different metal ligands for bio-methane separation[J]. CIESC Journal, 2014, (5).DOI: 10.3969/j.issn.0438-1157.2014.05.024.
The adsorption and separation capabilities of metal-organic frameworks (MOFs) for CO2 and CH4 gas mixtures were studied by grand canonical Monte Carlo (GCMC) simulations. Three sub-families (M-MOF-74
M-MIL-53 and [M(atz)(bdc)0.5]) (M=Mg
Co
Ni
Zn
Al
Cr) MOFs with different metal ligands were investigated. Simulation results showed that the CO2 adsorption capability of Mg-MOF-74 exceeded the others at high pressures; both amine functionalized [Zn(atz)(bdc)0.5] and [Co(atz)(bdc)0.5] MOFs had superior CO2 separation performance at low pressures. The radial distribution functions and the overlapping snapshots of CO2 adsorption showed that in each sub-family of MOFs
different metal ligands affected their CO2 adsorption configuration and resulted in their different adsorption and separation capabilities. This work could provide some guidance for the design and development of new high performance MOFs for CO2 and CH4 separation.