Dense Perovskite, La1‐xA′xFe1‐yCoyO3‐δ (A′= Ba, Sr, Ca), Membrane Synthesis, Applications, and Characterization
Dense Perovskite, La1‐xA′xFe1‐yCoyO3‐δ (A′= Ba, Sr, Ca), Membrane Synthesis, Applications, and Characterization
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DOI：
10.1111/j.1151-2916.1998.tb02501.x
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发表时间：
2005-01
影响因子：
3.9
通讯作者：
C. Tsai;A. Dixon;Y. Ma;W. R. Moser;M. Pascucci
中科院分区：
文献类型：
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作者：
C. Tsai;A. Dixon;Y. Ma;W. R. Moser;M. Pascucci
为了获得高氧通量和还原稳定性的理想性能，合成了La 1-xA′xFe0.8Co0.2O3-δ（A′= Ca，Sr，Ba）钙钛矿粉体。在一侧为空气另一侧为氦气的非反应实验中，La 1-xA′xFe0.8-Co0.2O3-δ钙钛矿膜的稳态透氧速率顺序为A′x= Ba0.8 > Ba0.6 > Ca0.6 > Sr0.6。在850°C下在致密的La 0.2Ba 0.8Fe 0.8Co 0.2O3-δ膜反应器中进行甲烷部分氧化制合成气（CO + H2），其中氧气从空气中分离并同时进料到甲烷流中。还原性气氛影响膜反应侧表面，而钡富集发生在空气侧表面。从空气侧连续输送的氧气似乎使膜内部稳定，并且反应器操作长达850小时。
La1-xA′xFe0.8Co0.2O3-δ (A′= Ca, Sr, Ba) perovskite powders were synthesized to attain the desired properties of high O2 flux and stability under reducing conditions. Steady-state oxygen permeation rates for La1-xA′xFe0.8-Co0.2O3-δ perovskite membranes in nonreacting experiments with air on one side and helium on the other side of the membrane were in the order A′x= Ba0.8 > Ba0.6 > Ca0.6 > Sr0.6. Partial oxidation of methane to syngas (CO + H2) was performed in a dense La0.2Ba0.8Fe0.8Co0.2O3-δ membrane reactor at 850°C in which oxygen was separated from air and simultaneously fed into the methane stream. The reducing atmosphere affected the membrane reaction-side surface while barium enrichment occurred on the air-side surface. Oxygen continuously transported from the air side appeared to stabilize the membrane interior, and the reactor was operated for up to 850 h.