膜
化学工程
选择性
碳纳米管
材料科学
胺气处理
磁导率
促进扩散
饱和(图论)
化学
有机化学
复合材料
催化作用
工程类
组合数学
生物化学
数学
作者
Yutong Yang,Yang Han,Ruizhi Pang,W.S. Winston Ho
出处
期刊:Membranes
[Multidisciplinary Digital Publishing Institute]
日期:2020-11-10
卷期号:10 (11): 333-333
被引量:15
标识
DOI:10.3390/membranes10110333
摘要
Amine-containing mixed-matrix membranes incorporated with amino-functionalized multi-walled carbon nanotubes (AF-MWNTs) were synthesized for CO2/H2 separation based on the facilitated transport mechanism. AF-MWNTs were chosen primarily as the mechanical reinforcing filler to enhance the membrane stability. At 107 °C and 0.2-MPa feed pressure, the membrane incorporated with 10 wt.% AF-MWNTs showed a CO2 permeability of 3196 Barrers and a CO2/H2 selectivity of 205. At the higher feed pressure of 1.5 MPa, owing to the carrier saturation phenomenon, the same membrane exhibited reduced transport performance with a CO2 permeability of 776 Barrers and a CO2/H2 selectivity of 31. These separation performances at both the low and high feed pressures were well above the theoretical upper bound. Furthermore, the incorporation of 10 wt.% AF-MWNTs led to a significant improvement on membrane stability. The transport performance and selective layer thickness of this membrane maintained for 100 h, which suggested that the incorporation of AF-MWNTs improved the resistance to membrane compaction upon a high feed pressure. Therefore, this work is considered as one of the crucial steps to enable the application of facilitated transport membranes to high-pressure gas processing such as syngas purification.
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