posted on 2024-01-26, 11:03authored byLe Yan, Hui-Ting Zheng, Liang Song, Zhang-Wen Wei, Ji-Jun Jiang, Cheng-Yong Su
Purifying
C2H6/C3H8 from a ternary
natural gas mixture through adsorption separation
is an important but challenging process in the petrochemical industry.
To address this challenge, the industry is exploring effective strategies
for designing high-performance adsorbents. In this study, we present
two metal–organic frameworks (MOFs), DMOF-TF and DMOF-(CF3)2, which have fluorinated pores obtained by substituting
linker ligands in the host material. This pore engineering strategy
not only provides suitable pore confinement but also enhances the
adsorption capacities for C2H6/C3H8 by providing additional binding sites. Theoretical
calculations and transient breakthrough experiments show that the
introduction of F atoms not only improves the efficiency of natural
gas separation but also provides multiple adsorption sites for C2H6/C3H8–framework
interactions.