Sandwich-like multilayer hollow fiber carbon membranes for gas separations

IF 8.4 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science Pub Date : 2025-03-13 DOI:10.1016/j.memsci.2025.123972

Yuqian Liu , Guanran Zhao , Fengya Tong , Zhi Li , Lisha Wang , Chuning Fang , Linfeng Lei , Zhi Xu

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Abstract

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 ∼350 % increase in H₂ permeance and maintained a high H₂/CH₄ ideal selectivity of 398. Besides, the membranes exhibited pressure-resistance superiority, evidenced by H₂/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 H₂/CH₄ separation factor of ∼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 H₂ (helium) extraction from natural gas and CO₂ removal from natural gas.

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来源期刊

Journal of Membrane Science 工程技术-高分子科学

CiteScore

17.10

自引率

17.90%

发文量

1031

审稿时长

2.5 months

期刊介绍： The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.