Stable Fluorinated Hybrid Microporous Material for the Efficient Separation of C₂-C₃ Alkyne/Alkene Mixtures

The separation of C₂-C₃ alkyne/alkene mixtures is important but difficult work thanks to their similar physical and chemical properties. Crystalline porous materials with high alkyne adsorption and prominent separation selectivity of alkyne/alkene mixtures have been extensively investigated because of their energy-saving merits. Herein, we report a fluorinated hybrid microporous material (FJI-W1) that exhibits unexpected water and thermal stability. Gas sorption isotherms show that FJI-W1 has ultrahigh C₂H₂ and C₃H₄ adsorption capacities of 150 and 159 cm³/g, respectively. Furthermore, dynamic breakthrough experiments indicate that the intervals of breakthrough time between the two gases for 1:99 (v/v) C₂H₂/C₂H₄ and 1:99 (v/v) C₃H₄/C₃H₆ can be up to 230 and 600 min/g, respectively. Additionally, the tests with different flow rates and three-cycle breakthrough tests demonstrate that FJI-W1 has a remarkable C₂-C₃ alkyne/alkene separation performance.