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A CO 2 ‐stable hollow‐fiber membrane with high hydrogen permeation flux
Author(s) -
Chen Yan,
Liao Qing,
Li Zhong,
Wang Haihui,
Wei Yanying,
Feldhoff Armin,
Caro Jürgen
Publication year - 2015
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.14772
Subject(s) - permeation , membrane , hydrogen , hollow fiber membrane , fiber , materials science , chemical engineering , phase inversion , analytical chemistry (journal) , chemistry , chromatography , composite material , organic chemistry , biochemistry , engineering
A Mo‐substituted lanthanum tungstate mixed proton‐electron conductor, La 5.5 W 0.6 Mo 0.4 O 11.25−δ (LWM04), was synthesized using solid state reactions. Dense U‐shaped LWM04 hollow‐fiber membranes were successfully prepared using wet‐spinning phase‐inversion and sintering. The stability of LWM04 in a CO 2 ‐containing atmosphere and the permeation of hydrogen through the LWM04 hollow‐fiber membrane were investigated in detail. A high hydrogen permeation flux of 1.36 mL/min cm 2 was obtained for the U‐shaped LWM04 hollow‐fiber membranes at 975°C when a mixture of 80% H 2 −20% He was used as the feed gas and the sweep side was humidified. Moreover, the hydrogen permeation flux did not significantly decrease over 70 h of operation when fed with a mixture containing 25% CO 2 , 50% H 2 , and 25% He, indicating that the LWM04 hollow‐fiber membrane has good stability under a CO 2 ‐containing atmosphere. © 2015 American Institute of Chemical Engineers AIChE J , 61: 1997–2007, 2015