渗透
膜
选择性
渗透
层状结构
气体分离
材料科学
热扩散率
分离过程
化学工程
分子
膜技术
化学
色谱法
有机化学
催化作用
热力学
复合材料
生物化学
物理
工程类
作者
Guangyu Xing,Shenzhen Cong,Bo Wang,Zhihua Qiao,Qinghua Li,Chang Cong,Ye Yuan,Menglong Sheng,Yunqi Zhou,Fei Shi,Jun Ma,Yurui Pan,Xinlei Liu,Song Zhao,Jixiao Wang,Zhi Wang
出处
期刊:Small
[Wiley]
日期:2023-11-21
标识
DOI:10.1002/smll.202309360
摘要
Membrane-based separation process for unconventional natural gas purification (mainly N2 /CH4 separation) has attracted more attention due to its considerable economic benefits. However, the majority of separation membranes at this stage, particularly N2 -selective membranes, achieve the desired separation target by mainly relying on the diffusivity-selectivity mechanism. To overcome the limitation of a single mechanism, 2D lamellar MXene membranes with a double selectivity mechanism are prepared to enhance N2 permeance and N2 /CH4 selectivity via introducing unsaturated metal sites into MXene, which can form specific interactions with N2 molecules and enhance N2 permeation. The resulting membranes exhibit an inspiring N2 /CH4 separation performance with an N2 permeance of 344 GPU and N2 /CH4 selectivity of 13.76. The collaboration of the double selectivity mechanism provides a new idea for the development of a novel N2 -selective membrane for N2 removal and CH4 purification, which further broadens the application prospects of membrane separation technology in the field of unconventional natural gas purification.
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