Hyperbranched polymer hollow-fiber-composite membranes for pervaporation separation of aromatic/aliphatic hydrocarbon mixtures  

作　　者：Tong Liu Hao Sun Xiangqiong Wang Jie Li Zhanquan Zhang Pei Wu Naixin Wang Quanfu An 

机构地区：[1]Beijing Key Laboratory for Green Catalysis and Separation,Department of Chemical Engineering,College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China [2]Petrochemical Research Institute,CNPC,Beijing 102206,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第5期13-22,共10页中国化学工程学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (22178008, 22125801);Petrochina (2022DJ6004)。

摘　　要：The separation of aromatic/aliphatic hydrocarbon mixtures is crucial in the petrochemical industry.Pervaporation is regarded as a promising approach for the separation of aromatic compounds from alkanes. Developing membrane materials with efficient separation performance is still the main task since the membrane should provide chemical stability, high permeation flux, and selectivity. In this study, the hyperbranched polymer(HBP) was deposited on the outer surface of a polyvinylidene fluoride(PVDF)hollow-fiber ultrafiltration membrane by a facile dip-coating method. The dip-coating rate, HBP concentration, and thermal cross-linking temperature were regulated to optimize the membrane structure.The obtained HBP/PVDF hollow-fiber-composite membrane had a good separation performance for aromatic/aliphatic hydrocarbon mixtures. For the 50%/50%(mass) toluene/n-heptane mixture, the permeation flux of optimized composite membranes could reach 1766 g·m^(-2)·h^(-1), with a separation factor of 4.1 at 60℃. Therefore, the HBP/PVDF hollow-fiber-composite membrane has great application prospects in the pervaporation separation of aromatic/aliphatic hydrocarbon mixtures.

关 键 词：Aromatic/aliphatic hydrocarbons Hyperbranched polymer PERVAPORATION Hollow fiber membrane DIP-COATING 

分 类 号：TQ028.8[化学工程]