Investigation of carbonates in oxygen-transporting membrane ceramics
Investigation of carbonates in oxygen-transporting membrane ceramics
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氧传输膜陶瓷中碳酸盐的研究
DOI：
10.1016/j.memsci.2015.01.042
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发表时间：
2015
影响因子：
9.5
通讯作者：
Armin Feldhoff
中科院分区：
文献类型：
--
作者：
Olga Ravkina;Tobias Klande;Armin Feldhoff
研究了钙钛矿型透氧膜在CO_2清扫过程中的性能。采用溶胶凝胶法合成了x=1、0.8、0.6和0.4的La1−xSrxCo0.8Fe0.2O3LSCF系列材料(−δ，LSCF2882，LSCF4682，LSCF6482)。为了研究CO2对膜的物相组成和微结构的影响，在1173℃、1173℃、CO2气氛下进行了长时间的透氧实验(超过200小时)，并进行了透射电子显微镜观察。电子能量损失谱(EELS)和能量色散X射线谱(EDXS)表明，低La含量的LSCF材料外表面形成了碳酸盐，这与氧渗透通量的降低有关。然而，LSCF 6482材料对CO_2气体是耐受的。运行200h后未发现碳酸盐层，氧通量保持稳定。
The performance of perovskite-type oxygen-transporting membranes during CO2sweeping has been investigated. The series of La1−xSrxCo0.8Fe0.2O3−δ(LSCF) materials withx=1, 0.8, 0.6 and 0.4 (SCF, LSCF2882, LSCF4682, LSCF6482) were synthesized by the sol–gel method and characterized by X-ray diffraction (XRD). To investigate the poisoning effect of CO2on the phase composition and microstructure of the membranes after long-term oxygen permeation experiments (more than 200 h) at 1173 K under a CO2atmosphere, transmission electron microscopy (TEM) investigations were carried out. Electron-energy loss spectroscopy (EELS) and energy-dispersive X-ray spectroscopy (EDXS) revealed the formation of carbonate at the outer surface of the LSCF materials with low lanthanum content, which correlates with a decrease in oxygen permeation flux. Nevertheless, the LSCF 6482 material is tolerant to CO2gas. No carbonate layer was found after 200 h of operation, and the oxygen flux remained stable.
影响因子：
9.5
作者：
Partovi, Kaveh;Liang, Fangyi;Caro, Juergen
通讯作者：
Caro, Juergen
影响因子：
9.5
作者：
Klande, Tobias;Ravkina, Olga;Feldhoff, Armin
通讯作者：
Feldhoff, Armin