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Updated: Sep 24, 2026

Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
CH3OH-induced structural optimization of ZIF-9 for efficient C3H6/C3H8 separation
Jiaqi Wen1, Hao Yu1, Jiakai Shi1
1State Key Laboratory of Fluorine & Nitrogen Chemicals, College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China. jycai1991@fzu.edu.cn.
Abstract:
The efficient separation of C3H6 and C3H8 is a challenging industrial process. In this study, flexible ZIF-9 was modified by methanol solvent exchange to improve C3H6/C3H8 separation. The framework topology remained intact, while solvent-induced effects optimized the micropore size distribution, enhanced structural flexibility and enabled guest-responsive pore opening. Dynamic breakthrough tests showed that modified ZIF-9-II exhibited a significantly improved separation window, enabling effective separation in both propylene-rich and propane-rich mixtures with good cycling stability. This work demonstrates that methanol-mediated solvent exchange is an effective strategy to modulate the ZIF-9 pore structure and boost C3H6/C3H8 separation performance.
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