Stable Fluorinated Hybrid Microporous Material for the EfficientSeparation of C2-C3Alkyne/Alkene Mixtures

The separation of C2-C3alkyne/alkene mixtures is important butdifficult work thanks to their similar physical and chemical properties. Crystallineporous materials with high alkyne adsorption and prominent separation selectivityof alkyne/alkene mixtures have been extensively investigated because of theirenergy-saving merits. Herein, we report afluorinated hybrid microporous material(FJI-W1) that exhibits unexpected water and thermal stability. Gas sorptionisotherms show that FJI-W1 has ultrahigh C2H2and C3H4adsorption capacitiesof 150 and 159 cm3/g, respectively. Furthermore, dynamic breakthroughexperiments indicate that the intervals of breakthrough time between the twogases for 1:99 (v/v) C2H2/C2H4and 1:99 (v/v) C3H4/C3H6can be up to 230and 600 min/g, respectively. Additionally, the tests with differentflow rates andthree-cycle breakthrough tests demonstrate that FJI-W1 has a remarkable C2-C3alkyne/alkene separation performance.

Automated summary

In this study, a fluorinated hybrid microporous material (FJI-W1) with unexpected water and thermal stability is reported. FJI-W1 exhibits ultrahigh adsorption capacities for C2H2 and C3H4, as well as remarkable separation selectivity for alkyne/alkene mixtures. Dynamic breakthrough experiments demonstrate the excellent performance of FJI-W1 in C2-C3 alkyne/alkene separation.