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Novel La 0.7 Sr 0.3 FeO 3 − δ /(La 0.5 Sr 0.5 ) 2 CoO 4 + δ composite hollow fiber membrane for O 2 separation with high CO 2 resistance
Author(s) -
Han Ning,
Cheng Junling,
Han Dezhi,
Chen Guoliang,
Zhang Shuguang,
Wang Guangjian,
Yang Naitao,
Liu Shaomin
Publication year - 2019
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4872
Subject(s) - scanning electron microscope , perovskite (structure) , materials science , composite number , analytical chemistry (journal) , membrane , permeation , oxygen permeability , thermal stability , oxygen , chemical engineering , composite material , chemistry , crystallography , chromatography , biochemistry , organic chemistry , engineering
Summary Recently, the reported Perovskite/Ruddlesden‐Popper composite with significant improvement of oxygen surface kinetics has been adopted into gas separation process. Here, we report a novel La 0.7 Sr 0.3 FeO 3 − δ /(La 0.5 Sr 0.5 ) 2 CoO 4 + δ (LSF‐LSC) composite hollow fiber membrane (HFM), which was characterized by X‐ray diffraction (XRD), scanning electron microscope (SEM), and thermal expansion test, etc. The O 2 permeation test results indicated that, under sweeping gas of pure He (100 mL min −1 ), the composite HFM exhibited the superior O 2 permeability (0.72 mL min −1 cm −2 ) at the temperature of 950 ° C with respect to the single La 0.7 Sr 0.3 FeO 3 − δ (LSF) membrane, acid‐etched membrane, and (La 0.5 Sr 0.5 ) 2 CoO 4 + δ (LSC)‐coated membrane. Moreover, the composite membrane exhibited high CO 2 tolerance as well as phase stability. The generation of hetero‐interface between Ruddlesden‐Popper phase and perovskite phase could be responsible for the improvement of the oxygen transportation over the fabricated composite membrane.