文献类型：期刊文献

英文题名：Hierarchical porous carbon membranes for lean-helium extraction from high-pressure natural gas

作者：Zhang, Chi[1];Zhao, Guanran[1,2];Li, Zhi[1];Lei, Linfeng[1,2];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Suzhou Lab, Suzhou, Peoples R China

年份：2025

卷号：71

期号：6

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20250917960948);WOS:【SCI-EXPANDED(收录号:WOS:001432235900001)】；

基金：This study was supported by the National Key Research & Development Program of China (2022YFB3805503 and 2021YFB3801301) and the National Natural Science Foundation of China (22208096).

语种：英文

外文关键词：carbon molecular sieve membranes; helium extraction; hollow fiber membranes; membrane materials

摘要：Given the scarcity of helium (He) resources, the application of scalable and energy-efficient membrane-mediated separation techniques for helium extraction holds substantial potential; however, few membrane materials have been reported for lean-helium extraction from natural gas feeds (<1000 ppm). Herein, we present a facile strategy for fabricating the carbon molecular sieve (CMS) hollow fiber membranes with a hierarchical porous structure by tailoring the phase inversion behaviors of blend polymeric precursors and engineering the pyrolysis protocol. The CMS membranes composed of highly homogenized and inconsecutive macropores and size-constrained ultramicropores in synergy exhibited superior separation performance in the separation of He/CH4. For instance, CA-3-700 membranes showed a He/CH4 ideal selectivity of 1427 and He permeability of 521 barrer. In addition, the membrane presented superior mixed gas separation performances under simulated helium-contained high-pressure natural gas at hundred ppm levels (400-1300 ppm), while demonstrating long-term continuous stability (from a quinary mixture of He/CH4/N-2/C2H6/CO2) over 120 h.