纳米片
膜
介孔材料
材料科学
选择性
化学工程
多孔性
镧系元素
基质(化学分析)
巴勒
气体分离
纳米技术
复合材料
化学
有机化学
离子
催化作用
生物化学
工程类
作者
Yanli Zhang,Meixue Zhao,Xu Li,Qingping Xin,Xiaoli Ding,Lizhi Zhao,Hui Ye,Ligang Lin,Hong Li,Yuzhong Zhang
标识
DOI:10.1016/j.jiec.2023.05.029
摘要
The incorporation of porous nano-fillers into mixed matrix membranes (MMMs) has a great impact on CO2 separation. In this study, a series of F-Ln (Ln is the Light Lanthanide, Ln = La, Ce, Pr, Nd) nanosheets with mesoporous structure was fabricated as a filler in Pebax®1657 matrix to improve the performance of CO2 separation. F-Ln nanosheets are uniformly distributed in the membrane and the mesoporous structure can construct multiple channels for CO2 fast transport in Pebax/F-Ln MMMs. The pore diameter of nanosheet is in order: F-La > F-Ce > F-Pr > F-Nd, and the smaller pore diameter of nanosheets is beneficial to improve the CO2 separation performance. In humidified conditions, Pebax/F-Nd-6 MMMs show optimum separation performance among MMMs, and the CO2 permeability is up to 1265 Barrer and CO2/CH4 selectivity is 36.7, which are 2.3 times and 1.9 times higher than pure Pebax and approaches 2019 upper bound. Meanwhile, to demonstrate the potential universal applicability of F-Ln nanosheets in CO2 separation, XLPEO/F-Ce MMMs were fabricated to separate CO2/N2 and the performance exceeds the 2019 upper bound. The efficient CO2 separation performance of 2D F-Ln nanosheets with mesoporous structure in membranes reveals the potential application of these nanosheets in industrial CO2 separation.
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