Résumé
The purification of methane from natural gas is extremely important for industrial applications. In this study, hierarchical porous material LIFM-Z1 with microporous cages and mesoporous hexagonal one-dimensional channels was successfully synthesized and evaluated. The results show that LIFM-Z1 can effectively separate CH4 4 from the mixed gas containing CH4, 4 , C2H6, 2 H 6 , C3H8 3 H 8 and n-C4H10. 4 H 10 . Single-component adsorption experiments revealed the selective adsorption ability of LIFM-Z1 for C2H6, 2 H 6 , C3H8, 3 H 8 , and n-C4H10, 4 H 10 , enabling a clear distinction between these components and CH4. 4 . This selectivity was further verified by dynamic breakthrough experiments. Theoretical analysis shows that the interaction between LIFM-Z1 and gas molecules mainly depends on the synergistic effect of C-H center dot center dot center dot O hydrogen bond and C-H center dot center dot center dot C van der Waals force. The results highlight the potential of utilizing 3D linkers to enhance the inner wall interaction with CH4 4 and its related gases in MOF construction. These characteristics of LIFM-Z1 not only successfully demonstrate the potential of separation and purification of natural gas with high efficiency, but also show its broad application prospects in the actual natural gas processing.