文献类型：期刊文献

英文题名：Sandwich-like multilayer hollow fiber carbon membranes for gas separations

作者：Liu, Yuqian[1];Zhao, Guanran[1,2];Tong, Fengya[3];Li, Zhi[1];Wang, Lisha[1];Fang, Chuning[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 215100, Peoples R China;[3]Sinopec Shanghai Res Inst Petrochem Technol Co Ltd, Shanghai 201208, Peoples R China

年份：2025

卷号：724

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20251218074275);WOS:【SCI-EXPANDED(收录号:WOS:001452208600001)】；

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

语种：英文

外文关键词：Carbon molecular sieve membranes; Gas separations; Asymmetric hollow fiber membranes; Hydrogen separation; Sandwich-like structure

摘要：Carbon molecular sieve (CMS) membranes with tunable and rigid pore structures are attractive for a broad spectrum of gas separations. The microstructure design of CMS membranes is one of the keys to developing advanced CMS membranes. Here, we present a sandwich-like multilayer CMS (SCMS) hollow fiber membrane, with inner and outer dense layers and an intermediate porous layer structure, which holds precise molecular sieving ability and good mechanical strength. Compared to symmetrical dense layer membranes, the SCMS hollow fiber membrane showed a similar to 350 % increase in H-2 permeance and maintained a high H-2/CH4 ideal selectivity of 398. Besides, the membranes exhibited pressure-resistance superiority, evidenced by H-2/CH4 mixed gas tests under high-pressure conditions up to 40 bar. A dynamic durability test under a feed pressure of 30 bar demonstrated its good stability with a maintained H-2/CH4 separation factor of similar to 300. This work shows a path to design high-performance CMS membranes with a sandwich-like multilayer structure to maintain molecular sieving capability and pressure-resistance ability, which are ideal membrane materials for high-pressure-related light gas separations, such as H-2 (helium) extraction from natural gas and CO2 removal from natural gas.