可规模化制备的COF膜用于原油脂肪族/芳香族分离

Li Cao1, Shuhao An1, Bingbing Yuan1, Zhen Li1, Vasilios G. Samaras2, Ting Xu1, Xixiang Zhang3, Huabin Zhang1, Zhiping Lai1* Distillation has been the cornerstone of crude oil refining for more than a century, relying on boiling point differences for fractionation. Although effective, it is highly energy-intensive and lacks the precision to separate specific hydrocarbon classes. We report crystalline covalent organic framework (COF) membranes with well-defined micropores and alkyl- functionalized frameworks that combine molecular sieving with preferential affinity to enrich aliphatics. An electric field– assisted roll-to-roll process enabled scalable fabrication of continuous membranes. These COF membranes enriched aliphatics to >95% and delivered permeance orders of magnitude higher than amorphous polymers in Arabian Light crude oil. …