文献类型：期刊文献

英文题名：Silicon-tailored carbon molecular sieve membranes enable precise and stable hydrogen separation

作者：Fang, Chuning[1];Chen, Xingyu[1];Fu, Zhinan[2];Zeng, Zuoxiang[1];Lei, Linfeng[1,2];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Suzhou Lab, Suzhou 215100, Peoples R China

年份：2026

卷号：744

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20260520009402);WOS:【SCI-EXPANDED(收录号:WOS:001681738100001)】；

基金：This study was supported by the National Key Research & Development 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 (CMS) membranes; Chemical functionalization; Microstructure tuning; Anti-aging; H 2 /CO 2 separation

摘要：The requirement for efficient CO2 capture during hydrogen production from fossil fuels promotes the development of advanced, energy-efficient solutions, while the application of temperature/pressure-resistant membranes is a promising candidate. Polymer-derived carbon molecular sieve (CMS) membranes with precise molecular discrimination capability hold attractive promise in H2/CO2 separation. Nonetheless, microstructure tuning for the precise discrimination of H2 and CO2 has so far remained challenging, and physical aging is also an inevitable problem. Herein, we proposed a precursor-crosslinked strategy via chemical functionalization of cellulose precursor to enhance molecular sieving ability and simultaneously overcome physical aging of the derived CMS membranes. The membrane presents a remarkable H2/CO2 selectivity of 91.0 and shows only 14 % H2 permeance loss in 120 days. Besides, it maintains excellent separation performance over 300 h under high pressure (up to 20 bar) and high temperature of 140 degrees C with a feeding of 50 mol% H2/50 mol% CO2. This study provides an effective way to construct the sub-nano-sized microporous structure of CMS membranes and demonstrates its potential for blue hydrogen purification under harsh conditions.