Aromatic-aliphatic hydrocarbon separation with oriented monolayer polyhedral membrane

• 成果类型: Article
• 署名作者: Sun, Hao; Wang, Naixin; Xu, Yinghui; Wang, Fengkai; Lu, Jun; Wang, Huanting; An, Quan-Fu
• 署名单位: Beijing University of Technology; Monash University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11168
• DOI: 10.1126/science.adq5577
• 发表日期: 2024-11-29
• 页码: 1037-1042
• 关键词: metal-organic frameworks; hybrid membranes; aromatic/aliphatic hydrocarbons; benzene/cyclohexane mixtures; pervaporation; solvent; benzene

摘要

Aromatic-aliphatic hydrocarbon separation is a challenging but important industrial process. Pervaporation membrane technology has the potential for separating these mixtures. We developed an oriented monolayer polyhedral (OMP) membrane that consists of a monolayer of ordered polyhedral particles and is anchored by hyperbranched polymers. It contains a high density of straight, selective nanochannels, enabling the preferential transport of aromatic molecules. Compared with traditional mixed-matrix membranes with random orientations, the OMP membrane improves the pervaporation separation index for aromatic-aliphatic hydrocarbon mixtures with C6 and C7 compounds, surpassing the performance of existing membranes by 3 to 10 times. This high performance demonstrates the potential of OMP membranes for hydrocarbon molecular separation and their application in the value-added separation of naphtha feedstocks.