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

doi:10.1016/j.cjche.2024.01.009

中国化学工程学报 ›› 2024, Vol. 69 ›› Issue (5): 13-22.DOI: 10.1016/j.cjche.2024.01.009

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

Tong Liu¹, Hao Sun¹, Xiangqiong Wang¹, Jie Li¹, Zhanquan Zhang², Pei Wu², Naixin Wang¹, Quanfu An¹

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

收稿日期:2023-10-18 修回日期:2024-01-11 出版日期:2024-05-28 发布日期:2024-07-01
通讯作者: Naixin Wang,E-mail:wangnx@bjut.edu.cn
基金资助:
This work was financially supported by the National Natural Science Foundation of China (22178008, 22125801) and Petrochina (2022DJ6004).

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

Tong Liu¹, Hao Sun¹, Xiangqiong Wang¹, Jie Li¹, Zhanquan Zhang², Pei Wu², Naixin Wang¹, Quanfu An¹

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

Received:2023-10-18 Revised:2024-01-11 Online:2024-05-28 Published:2024-07-01
Contact: Naixin Wang,E-mail:wangnx@bjut.edu.cn
Supported by:
This work was financially supported by the National Natural Science Foundation of China (22178008, 22125801) and Petrochina (2022DJ6004).

摘要/Abstract

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

Abstract: 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.

Key words: Aromatic/aliphatic hydrocarbons, Hyperbranched polymer, Pervaporation, Hollow fiber membrane, Dip-coating

Tong Liu, Hao Sun, Xiangqiong Wang, Jie Li, Zhanquan Zhang, Pei Wu, Naixin Wang, Quanfu An. Hyperbranched polymer hollow-fiber-composite membranes for pervaporation separation of aromatic/aliphatic hydrocarbon mixtures[J]. 中国化学工程学报, 2024, 69(5): 13-22.

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

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

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