Active Sites Decorated Nonpolar Pore‐Based MOF for One‐step Acquisition of C<sub>2</sub>H<sub>4</sub> and Recovery of C<sub>3</sub>H<sub>6</sub>
Gang‐Ding Wang, Yong‐Zhi Li, Wen‐Juan Shi, Lei Hou, Yao‐Yu Wang, Zhonghua Zhu
Abstract
Abstract Herein, a 2‐fold interpenetrated metal‐organic framework (MOF) Zn‐BPZ‐TATB with accessible N/O active sites in nonpolar pore surfaces was reported for one‐step C 2 H 4 purification from C 2 H 6 or C 3 H 6 mixtures as well as recovery of C 3 H 6 from C 2 H 6 /C 3 H 6 /C 2 H 4 mixtures. The MOF exhibits the favorable C 2 H 6 and C 3 H 6 uptakes (>100 cm 3 g −1 at 298 K under 100 kPa) as well as selective adsorption of C 2 H 6 and C 3 H 6 over C 2 H 4 . The C 3 H 6 ‐ and C 2 H 6 ‐selective feature were investigated detailedly by experimental tests as well as sorption kinetic studyies. Molecular modelling revealed the multiple interactions between C 3 H 6 or C 2 H 6 molecules and methyl groups as well as triazine rings in pores. Zn‐BPZ‐TATB not only can directly generate 323.4 L kg −1 and 15.4 L kg −1 of high‐purity (≥99.9 %) C 2 H 4 from C 3 H 6 /C 2 H 4 and C 2 H 6 /C 2 H 4 mixtures, but also provide a large high‐purity (≥99.5 %) C 3 H 6 recovery capacity of 60.1 L kg −1 from C 3 H 6 /C 2 H 4 mixtures. More importantly, the high‐purity C 3 H 6 (≥99.5 %) and C 2 H 4 (≥99.9 %) with the productivities of 38.2 and 12.7 L kg −1 can be simultaneously obtained from C 2 H 6 /C 3 H 6 /C 2 H 4 mixtures through a single adsorption/desorption cycle.