Highly Selective and Hydrocarbon-Resistant Polyimide Hollow Fiber Membranes for Helium Recovery from Natural Gas

被引:12
作者
Liu, Lu [1 ,2 ,3 ]
Wu, Qi [1 ,2 ,3 ]
Wang, Shunli [3 ]
Lai, Wei [2 ,3 ]
Zheng, Peijun [3 ]
Wang, Can [1 ,2 ,3 ]
Wei, Xin [4 ]
Luo, Shuangjiang [3 ]
机构
[1] Univ Sci & Technol China, Sch Rare Earths, Hefei 230026, Peoples R China
[2] Ganjiang Innovat Acad, Chinese Acad Sci, Ganzhou 341119, Peoples R China
[3] Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
[4] SINOPEC Beijing Res Inst Chem Ind Co Ltd, Beijing 100013, Peoples R China
基金
中国国家自然科学基金;
关键词
PERMEATION PROPERTIES; CO2; REMOVAL; SEPARATION; POLYETHERIMIDE; PERMEABILITY; EXTRACTION; DENSE;
D O I
10.1021/acs.iecr.2c03907
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The recovery of helium from natural gas using membranes has attracted substantial attention, while very limited polymers were spun into hollow fibers and evaluated for realistic helium recovery. This work demonstrates the successful preparation of asymmetric and highly helium-selective hollow fiber membranes for the enrichment of helium from natural gas. A novel, aromatic copolyimide was designed and fabricated into hollow fiber membranes (HFMs) via the dry-jet/wet-quench spinning approach. The as-prepared HFMs display a He permeance of 85 GPU and high He-related gas selectivities of 140, 204, 448, and 609 for He/N2, He/CH4, He/C2H6, and He/C3H8 gas pairs, respectively. Particularly, ternary and quaternary mixed-gas permeation results reveal excellent light and heavy hydrocarbon resistance due to the competition between plasticization and gas sorption. The HFMs also demonstrated superior low-temperature gas separation performance and outstanding membrane gas separation stability, rendering them attractive for helium recovery.
引用
收藏
页码:708 / 716
页数:9
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