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Oxygen permeation through a CO 2 ‐tolerant mixed conducting oxide (Pr 0.9 La 0.1 ) 2 (Ni 0.74 Cu 0.21 Ga 0.05 )O 4+δ
Author(s) -
Tang Jun,
Wei Yanying,
Zhou Lingyi,
Li Zhong,
Wang Haihui
Publication year - 2012
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.12742
Subject(s) - permeation , oxygen , oxide , membrane , ceramic , fluorite , flux (metallurgy) , phase (matter) , chemistry , chemical engineering , ceramic membrane , materials science , analytical chemistry (journal) , chromatography , organic chemistry , biochemistry , engineering
A novel K 2 NiF 4 ‐type oxide based on (Pr 0.9 La 0.1 ) 2 (Ni 0.74 Cu 0.21 Ga 0.05 )O 4+δ (PLNCG) dense mixed conducting ceramic membrane was successfully prepared through a sol–gel route. The oxygen permeation flux through the membrane swept by pure CO 2 was comparative to that swept by He. The oxygen permeation and the stability of PLNCG under pure CO 2 were investigated in detail. A membrane with a thickness of 0.8 mm was steadily operated for 230 h with a constant oxygen permeation flux of 0.32 mL/(min cm 2 ) at 975 ° C using pure CO 2 as sweep gas. X‐ray diffraction shows that PLNCG can maintain its fluorite phase, and no carbonates were observed, even when it was exposed to pure CO 2 for a long time. © 2011 American Institute of Chemical Engineers AIChE J, 58: 2473–2478, 2012