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High‐rate hydrogen separation using an MIEC oxygen permeable membrane reactor
Author(s) -
Li Wenping,
Cao Zhongwei,
Zhu Xuefeng,
Yang Weishen
Publication year - 2017
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15502
Subject(s) - hydrogen , membrane , oxygen , chemistry , membrane reactor , chemical engineering , hydrogen purifier , analytical chemistry (journal) , hydrogen production , chromatography , organic chemistry , biochemistry , engineering
In this study, we propose using mixed ionic‐electronic conducting (MIEC) oxygen permeable membrane to separate hydrogen via the water splitting reaction. To do that, steam was fed to one side of the membrane (side I) and a low‐purity hydrogen was fed to the other side (side II). Oxygen from water splitting on side I permeates through the membrane driven by an oxygen chemical potential gradient across the membrane to react with the low‐purity hydrogen on side II. After condensation and drying, high‐purity hydrogen is acquired from side I. Thus, the hydrogen separation process is realized based on the fact that the low‐purity hydrogen is consumed and high‐purity hydrogen is acquired. We achieved a high hydrogen separation rate (13.5 mL cm −2 min −1 ) at 950°C in a reactor equipped with a 0.5‐mm‐thick Ba 0.98 Ce 0.05 Fe 0.95 O 3‐δ membrane. This research proofed that it is feasible to upgrade hydrogen purity using an MIEC oxygen permeable membrane. © 2016 American Institute of Chemical Engineers AIChE J , 63: 1278–1286, 2017