Environmental Science and Engineering Program, Biological and Environmental Science and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
Advanced Membranes and Porous Materials (AMPM) Center, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
Science. 2022 Jun 3;376(6597):1105-1110. doi: 10.1126/science.abm7686. Epub 2022 Jun 2.
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). The polytriazole membrane can enrich up to 80 to 95% of the hydrocarbon content with less than 10 carbon atoms (140 gram mole). These membranes preferentially separate paraffin over aromatic components, making them suitable for integration in hybrid distillation systems for crude oil fractionation.
设计能够在工业条件下处理并分离复杂的非水混合物的材料，并将其制成膜是一项具有挑战性的工作。我们报告了一种通用的策略，用于制造具有 10 纳米厚的选择性层的聚三唑膜，其中包含用于分离碳氢化合物的亚纳米通道。该过程涉及使用经典的非溶剂诱导相分离方法和热交联。膜的选择性可以调整到典型纳滤范围（200 至 1000 克分子）的低端。聚三唑膜可以富集 80%至 95%的碳氢化合物含量，其中碳原子数小于 10（140 克分子）。这些膜优先分离石蜡而不是芳烃成分，因此它们适合集成在用于原油分馏的混合蒸馏系统中。
