Oxygen exchange-limited transport and surface activation of Ba0.5Sr0.5Co0.8Fe0.2O3−δ capillary membranes
作者： A. Kovalevsky , C. Buysse , F. Snijkers , A. Buekenhoudt , J. Luyten
DOI: 10.1016/J.MEMSCI.2010.11.034
关键词:
摘要: Abstract Analysis of oxygen permeation fluxes through Ba 0.5 Sr Co 0.8 Fe 0.2 O 3− δ (BSCF) capillary membranes, fabricated via a phase-inversion spinning technique using polysulfone as binder, showed significant limiting role the surface-oxygen exchange kinetics. Within studied temperature and partial pressure ranges, activation core shell sides BSCF with praseodymium oxide (PrO x ) resulted in an increase rate about 300%. At 1123–1223 K activated membranes demonstrate almost 3-times lower energies for overall transport (∼35 kJ/mol) than non-activated capillaries, indicating that mechanism capillaries becomes significantly controlled by bulk diffusion limitations, allowing further improvement performance decreasing wall thickness. XRD, EDS EPMA studies revealed formation (Pr,Ba,Sr)(Co,Fe)O perovskite-type oxides on surface PrO -modified which may be responsible drastic rate. T > 1123 K both stable time, while at 1073 K only small initial decrease was observed.
elsevier.com
sci-hub.se 参考文章(47)
Prasad Apte, Jack C. Chen, Weitung Wang, Terry Joseph Mazanec, Ion conducting ceramic membrane and surface treatment ,(2001)
JX Yi, HL Lein, T Grande, S Yakovlev, HJM Bouwmeester, None, High-temperature compressive creep behaviour of the perovskite-type oxide Ba0.5Sr0.5Co0.8Fe0.2O3 − δ Solid State Ionics. ,vol. 180, pp. 1564- 1568 ,(2009) , 10.1016/J.SSI.2009.09.014
Marcel Mulder, Basic Principles of Membrane Technology ,(1991)
Zongping Shao, Sossina M. Haile, Ba-Sr-Co-Fe-O based perovskite mixed conducting materials as cathode materials for solid oxide fuel cells ,(2004)
L. Wang, R. Merkle, J. Maier, T. Acartürk, U. Starke, Oxygen tracer diffusion in dense Ba0.5Sr0.5Co0.8Fe0.2O3−δ films Applied Physics Letters. ,vol. 94, pp. 071908- ,(2009) , 10.1063/1.3085969
Pingying Zeng, Zhihao Chen, Wei Zhou, Hongxia Gu, Zongping Shao, Shaomin Liu, Re-evaluation of Ba0.5Sr0.5Co0.8Fe0.2O3- δ perovskite as oxygen semi-permeable membrane Journal of Membrane Science. ,vol. 291, pp. 148- 156 ,(2007) , 10.1016/J.MEMSCI.2007.01.003
Shaomin Liu, George R. Gavalas, Preparation of Oxygen Ion Conducting Ceramic Hollow-Fiber Membranes Industrial & Engineering Chemistry Research. ,vol. 44, pp. 7633- 7637 ,(2005) , 10.1021/IE040279I
Yingfang Wang, Haoshan Hao, Jianfeng Jia, Delin Yang, Xing Hu, Improving the oxygen permeability of Ba0.5Sr0.5Co0.8Fe0.2O3−δ membranes by a surface-coating layer of GdBaCo2O5+δ Journal of The European Ceramic Society. ,vol. 28, pp. 3125- 3130 ,(2008) , 10.1016/J.JEURCERAMSOC.2007.12.031
H. J. M. Bouwmeester, M. W. Den Otter, B. A. Boukamp, Oxygen transport in La 0.6Sr 0.4Co 1- yFe yO 3-d Journal of Solid State Electrochemistry. ,vol. 8, pp. 599- 605 ,(2004) , 10.1007/S10008-003-0488-3
Rune Bredesen, Truls Norby, On phase relations, transport properties and defect structure in mixed conducting SrFe1.5−xCoxOz Solid State Ionics. ,vol. 129, pp. 285- 297 ,(2000) , 10.1016/S0167-2738(99)00333-1