The iron (Fe) hollow fiber membranes, the microstructure and the performance of the membrane Low-cost iron (Fe) hollow fiber membrane for hydrogen separation

纤维 材料科学 微观结构 中空纤维膜 化学工程 复合材料 化学 有机化学 工程类 生物化学
作者
Zhifei Hu,Zejiao Wang,Mingming Wang,Zhigang Wang,Yuanyuan Chu,Xiaoyao Tan,Yunxia Hu,Tianjia Chen,Shaomin Liu
出处
期刊:Journal of Membrane Science [Elsevier BV]
卷期号:706: 122966-122966 被引量:2
标识
DOI:10.1016/j.memsci.2024.122966
摘要

Dense metal membranes are widely studied due to their promising performance in hydrogen separation. In this work, the low-cost dense iron (Fe) hollow fiber membranes (FeHFMs) were developed via the phase inversion and high-temperature sintering method. By tuning the preparation conditions, two typical gas-tight hollow fibers referred to as the sandwich- and honeycomb-structured membranes were successfully synthesized. H2 permeation behavior was well described by Sieverts equation based on the solution-diffusion mechanism. The sandwich-structured FeHFMs had an H2 flux of up to 7.51 mmol m-2 s-1 when operated at a temperature of 850°C. In comparison, the honeycomb-structured FeHFMs further enhanced the H2 flux by a factor of 3.2 due to the optimized membrane morphology with only one single dense iron layer. The developed FeHFMs showed superior H2 permeation stability in thermal shock tests (40 hours) and long-term stability tests (120 hours). This work also expanded the potential application horizons of the FeHFMs, which can be easily tailored into porous or dense structures by tuning the sintering conditions.
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