Kunpeng Yu, Taotao Ji, Mingming Wu, Sixing Chen, Yunlei Gao, Jiahui Yan, Shengyan Meng, Wenjing Hu, Xiao Fan, Wenwen Dong, Jianzhong Yin, Yi Liu
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Supercritical Ethane Processing of ZIF‐8 Membranes towards Pressure‐Resistant C3H6/C3H8 Separation
ZIF‐8 membranes have shown great promise in industrial‐scale C3H6/C3H8 separation. Nonetheless, sustainable preparation of pressure‐resistant ZIF‐8 membranes remains a grand challenge. In this study, we pioneered the use of supercritical ethane (scC2H6) as reaction medium for preparing pressure‐resistant ZIF‐8 membranes. Membrane growth in neutral organic environment was proven to have less disturbance to structure integrity compared with supercritical CO2 (scCO2). Gas permeation results indicated that obtained ZIF‐8 membrane exhibited an ideal C3H6/C3H8 selectivity of 172.1 with C3H6 permeance of 5.9×10‐9 mol·m−2·s−1·Pa−1. Of particular note, the membrane maintained stable C3H6/C3H8 selectivity of ~150 with C3H6 flux of ~1.6×10‐3 mol·m−2·s−1 at operation pressure of 6 bar, which was significantly different from ZIF‐8 membranes obtained from scCO2 reaction medium. Through combining with advantages of zero pollutant discharge and full ligand recovery, our protocol holds great promise in sustainable preparation of pressure‐resistant ZIF‐8 membranes towards practical application in high‐purity C3H6 production.
期刊介绍:
Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.