TY - JOUR

T1 - Effect of CO2 and SO2 on oxygen permeation and microstructure of (Pr0.9La0.1)2(Ni0.74Cu0.21Ga0.05)O4+δ membranes

AU - Wei, Yanying

AU - Ravkina, Olga

AU - Klande, Tobias

AU - Wang, Haihui

AU - Feldhoff, Armin

N1 - Funding Information: The authors greatly acknowledge the financial support from the Chinese-German Centre for Science ( GZ676 ), the Deutsche Forschungsgemeinschaft ( FE 928/4-1 ), Natural Science Foundation of China (no. 21176087 ), the Specialized Research Fund for the Doctoral Program of Higher Education (no. 20110172110013 ), the International Cooperation Project supported by the Department of Science and Technology of Guangdong Province (no. 2009B050700017 ) and the National Science Fund for Distinguished Young Scholars of China (no. 21225625 ). The authors also acknowledge Prof. J. Caro in this cooperation. Y.Y. Wei also acknowledges H.X. Luo for the technical support.

PY - 2013/2/15

Y1 - 2013/2/15

N2 - U-shaped K2NiF4-type oxide hollow-fiber membranes based on (Pr0.9La0.1)2(Ni0.74Cu0.21Ga0.05)O4+δ (PLNCG) were successfully prepared through a phase-inversion spinning process. The effect of CO2 and SO2 on the oxygen permeation, phase structure and the microstructure of the material were investigated. In situ XRD patterns of PLNCG under air, Ar and CO2 atmosphere in the range from room temperature to 1000°C were performed and indicate a good phase stability under oxidizing and reducing conditions as well as chemical stability against CO2. Effects of SO2 concentration in the sweep gas and the feed gas on the oxygen permeation flux through the PLNCG hollow-fiber membrane, as well as on membrane's microstructure were also investigated. Pr2O2SO4, La2O2SO4 and NiO formed after SO2 treatment and the material developed some porosity on the side exposed to SO2. The observations indicate that the PLNCG membrane is highly stable against CO2 but sensitive to SO2.

AB - U-shaped K2NiF4-type oxide hollow-fiber membranes based on (Pr0.9La0.1)2(Ni0.74Cu0.21Ga0.05)O4+δ (PLNCG) were successfully prepared through a phase-inversion spinning process. The effect of CO2 and SO2 on the oxygen permeation, phase structure and the microstructure of the material were investigated. In situ XRD patterns of PLNCG under air, Ar and CO2 atmosphere in the range from room temperature to 1000°C were performed and indicate a good phase stability under oxidizing and reducing conditions as well as chemical stability against CO2. Effects of SO2 concentration in the sweep gas and the feed gas on the oxygen permeation flux through the PLNCG hollow-fiber membrane, as well as on membrane's microstructure were also investigated. Pr2O2SO4, La2O2SO4 and NiO formed after SO2 treatment and the material developed some porosity on the side exposed to SO2. The observations indicate that the PLNCG membrane is highly stable against CO2 but sensitive to SO2.

KW - Chemical stability

KW - CO

KW - Membrane

KW - Oxygen permeation

KW - SO

UR - http://www.scopus.com/inward/record.url?scp=84871455182&partnerID=8YFLogxK

U2 - 10.1016/j.memsci.2012.11.075

DO - 10.1016/j.memsci.2012.11.075

M3 - Article

AN - SCOPUS:84871455182

VL - 429

SP - 147

EP - 154

JO - Journal of membrane science

JF - Journal of membrane science

SN - 0376-7388

ER -