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Enhanced compatibility and selectivity in mixed matrix membranes for propylene/propane separation |
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| Authors: | Rongrong He Shenzhen Cong Donglai Peng Yatao Zhang Meixia Shan Junyong Zhu Jing Wang Jorge Gascon |
| Affiliation: | 1. School of Chemical Engineering, Zhengzhou University, Zhengzhou, China
Contribution: Conceptualization (lead), Data curation (equal), Formal analysis (equal), Writing - original draft (lead);2. School of Chemical Engineering, Zhengzhou University, Zhengzhou, China Contribution: Data curation (equal), Formal analysis (equal), Writing - original draft (equal);3. School of Chemical Engineering, Zhengzhou University, Zhengzhou, China School of Material & Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, China Contribution: Formal analysis (equal), Software (equal);4. School of Chemical Engineering, Zhengzhou University, Zhengzhou, China;5. School of Chemical Engineering, Zhengzhou University, Zhengzhou, China Contribution: Writing - review & editing (equal);6. King Abdullah University of Science and Technology, KAUST Catalysis Center, Advanced Catalytic Materials, Thuwal, Saudi Arabia |
| Abstract: | Mixed matrix membranes (MMMs) based on metal–organic framework (MOF) have great promising application in separation of gas mixtures. However, achieving a good interfacial compatibility between polymer and MOF is not straightforward. In this work, focusing on one of the most challenging olefin/paraffin separations: propylene/propane (C3H6/C3H8), we demonstrate that modification of the MOF filler via dopamine polymerization using a double solvent approach strongly improves interfacial compatibility. The resulting membranes show an outstanding separation performance and long-term stability with propylene permeability nearly 90 Barrer and propylene/propane selectivity close to 75. We anticipate that similar MOF modification strategies may help solve the problem of interface defects in the manufacture of MMMs and be extended to other porous fillers. |
| Keywords: | double-solvent method interfacial compatibility mixed matrix membranes propylene/propane separation |
