Fe-MOF with\nU‑Shaped Channels for C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> and C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> Separation
Yue Li (102191)Xiaokang Wang (733379)Xinlei Yang (434378)Hongyan Liu (142625)Xianyi Chai (14653482)Yutong Wang (3852589)Weidong Fan (526395)Daofeng Sun (1406230)
Abstract
The development of high-performance adsorbents is critical\nfor\nthe low-energy separation of acetylene. Herein, we synthesized an\nFe-MOF (MOF, metal–organic framework) with U-shaped channels.\nThe adsorption isotherms of C<sub>2</sub>H<sub>2</sub>, C<sub>2</sub>H<sub>4</sub>, and CO<sub>2</sub> show that the adsorption capacity\nof acetylene is significantly larger than that of the other two gases.\nMeanwhile, the actual separation performance was verified by breakthrough\nexperiments, indicating the potential to separate C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> and C<sub>2</sub>H<sub>2</sub>/C<sub>2</sub>H<sub>4</sub> mixtures at normal temperatures. Grand Canonical Monte\nCarlo (GCMC) simulation demonstrates that the framework with U-shaped\nchannels interacts more strongly with C<sub>2</sub>H<sub>2</sub> than\nwith C<sub>2</sub>H<sub>4</sub> and CO<sub>2</sub>. The high C<sub>2</sub>H<sub>2</sub> uptake and low adsorption enthalpy highlight\nFe-MOF as a promising candidate for C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> separation with a low regeneration energy.
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