Stable Fluorinated Hybrid Microporous Material for the Efficient Separation of C<sub>2</sub>–C<sub>3</sub> Alkyne/Alkene Mixtures
Shuixiang Zou, Zhengyi Di, Hao Li, Yuanzheng Liu, Zhenyu Ji, Hengbo Li, Cheng Chen, Mingyan Wu, Maochun Hong
Abstract
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.