Journal
SCIENCE
Volume 376, Issue 6597, Pages 1105-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abm7686
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Funding
- King Abdullah University of Science and Technology (KAUST), Office of Vice President of Research
- Advanced Membranes and Porous Materials (AMPM) Center
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This study presents a versatile strategy for fabricating polytriazole membranes with subnanometer channels and 10-nanometer-thin selective layers, which can be tuned for different applications. These membranes exhibit excellent selectivity and are capable of efficiently separating low-carbon hydrocarbon components.
The design of materials and their manufacture into membranes that can handle industrial conditions and separate complex nonaqueous mixtures are challenging. We report a versatile strategy to fabricate polytriazole membranes with 10-nanometer-thin selective layers containing subnanometer channels for the separation of hydrocarbons. The process involves the use of the classical nonsolvent-induced phase separation method and thermal cross-linking. The membrane selectivity can be tuned to the lower end of the typical nanofiltration range (200 to 1000 gram mole(-1)). The polytriazole membrane can enrich up to 80 to 95% of the hydrocarbon content with less than 10 carbon atoms (140 gram mole(-1)). These membranes preferentially separate paraffin over aromatic components, making them suitable for integration in hybrid distillation systems for crude oil fractionation.
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