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- Title
The effect of different solvents on the formation of large‐area MOF membranes.
- Authors
Zhou, Fan; Chen, Yanling; Zhang, Zhengqing; Gu, Zhenjie; Sun, Yuxiu; Tong, Minman; Yang, Qingyuan; Dong, Wenjun; Pan, Yichang; Qiao, Zhihua; Zhong, Chongli
- Abstract
Metal–organic framework (MOF) membranes are widely used in gas separation processes. However, the effect of solvents on the formation of large‐area MOF membranes, which directly influences separation performance, has rarely been investigated. In this study, three solvents (methanol, ethanol, and water) were selected to systematically investigate their effects on the zeolite imidazolium frameworks (ZIF) membrane formation via experimental validation and simulations. The results indicated that the solvent selection influenced crystallization rate, crystal size, and ZIF‐8 membrane formation ability. Particularly, when water was used as a solvent, slow nucleation and crystallization of the ZIF‐8 crystals were observed, resulting in a more complete crystal structure and a thinner ZIF‐8 membrane. Therefore, the ZIF‐8 membrane exhibited a gas permeance of 10,000 gas permeation unit and enhanced CO2/N2 selectivity. Furthermore, ZIF‐8 membrane with a surface area of 2400 cm2 and spiral‐wound membrane modules were developed, paving the way for large‐scale industrial production.
- Subjects
METAL-organic frameworks; CRYSTAL structure; WATER use; CRYSTALLIZATION; MEMBRANE separation; SEPARATION of gases; ETHANOL; SOLVENTS
- Publication
AIChE Journal, 2024, Vol 70, Issue 8, p1
- ISSN
0001-1541
- Publication type
Article
- DOI
10.1002/aic.18455