Fe-MOF with U-Shaped Channels for C2H2/CO2 and C2H2/C2H4 Separation

The development of high-performance adsorbents is critical for the low-energy separation of acetylene. Herein, we synthesized an Fe-MOF (MOF, metal-organic framework) with U-shaped channels. The adsorption isotherms of C2H2, C2H4, and CO2 show that the adsorption capacity of acetylene is significantly larger than that of the other two gases. Meanwhile, the actual separation performance was verified by breakthrough experiments, indicating the potential to separate C2H2/CO2 and C2H2/C2H4 mixtures at normal temperatures. Grand Canonical Monte Carlo (GCMC) simulation demonstrates that the framework with Ushaped channels interacts more strongly with C2H2 than with C2H4 and CO2. The high C2H2 uptake and low adsorption enthalpy highlight Fe-MOF as a promising candidate for C2H2/CO2 separation with a low regeneration energy.

Automated summary

The development of high-performance adsorbents is crucial for the low-energy separation of acetylene. In this study, a Fe-MOF with U-shaped channels was synthesized. The adsorption isotherms and breakthrough experiments showed that Fe-MOF has a high acetylene uptake and can effectively separate C2H2/CO2 and C2H2/C2H4 mixtures at normal temperatures. The simulation results also demonstrated the strong interaction between Fe-MOF with U-shaped channels and acetylene.