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|Title:||A CO₂-stable K₂NiF₄-type oxide (Nd ₀.₉La₀.₁)₂(Ni₀.₇₄Cu 0.₂₁Al₀.₀₅)O₄+δ for oxygen separation|
|Other Titles:||A CO(2)-stable K(2)NiF(4)-type oxide (Nd (0).(9)La(0).(1))(2)(Ni(0).(74)Cu 0.(21)Al(0).(05))O(4)+delta for oxygen separation|
|Citation:||Industrial and Engineering Chemistry Research, 2013; 52(25):8571-8578|
|Publisher:||American Chemical Society|
|Yan Chen, Qing Liao, Yanying Wei, Zhong Li and Haihui Wang|
|Abstract:||A K2NiF4-type oxide (Nd0.9La0.1)2(Ni0.74Cu0.21Al0.05)O4+δ (NLNCA) has been successfully synthesized by a sol–gel method. The oxygen permeation and stability of the NLNCA membrane under CO2 atmosphere were systematically studied. A steady oxygen permeation flux of 0.39 mL/(min·cm2) was obtained through the NLNCA membrane with a membrane thickness of 0.6 mm at 975 °C when CO2 was used as the sweep gas. More importantly, the oxygen permeation flux has no significant decrease during 250 h operation, which indicates that the NLNCA membrane is stable under CO2. X-ray diffraction analysis of the spent membrane shows that the membrane retains K2NiF4-type structure and no carbonate was formed even exposed to CO2 after 250 h operation. The results indicate that the NLNCA membrane has a great potential application in supplying oxygen for oxyfuel combustion with CO2 capture. Moreover, the cost of the NLNCA is low, and it is beneficial for industrial application.|
|Rights:||Copyright © 2013 American Chemical Society|
|Appears in Collections:||Chemical Engineering publications|
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