A CO2-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO2 capture
A CO2-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO2 capture
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DOI：
10.1039/c3ta14870j
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发表时间：
2014-05
影响因子：
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通讯作者：
Huixia Luo;Tobias Klande;Zhengwen Cao;Fangyi Liang;Haihui Wang;J. Caro
中科院分区：
文献类型：
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作者：
Huixia Luo;Tobias Klande;Zhengwen Cao;Fangyi Liang;Haihui Wang;J. Caro
我们报道了一种新型的CO2稳定的耐还原双相氧传输膜40 wt% Nd0.6Sr0.4FeO3−δ-60 wt% Ce0.9Nd0.1O2−δ（40 NSFO-60 CNO），它是通过一种简单的EDTA-柠檬酸溶胶-凝胶法成功开发的。通过结合原位X射线衍射（XRD）、扫描电子显微镜（SEM）、背散射SEM（BSEM）和能量色散X射线光谱（EDXS）分析来研究结晶40 NSFO-60 CNO相的微观结构。研究了CO2和CH 4气氛下的氧气渗透和长期稳定性。在950 °C下，未稀释的CO2作为吹扫气体，发现稳定的氧通量为0.21 cm 3 min−1 cm−2，如果空气侧涂覆有多孔La0.6Sr0.4CoO3−δ（LSC）层，则增加到0.48 cm 3 min−1 cm −2。所有实验结果表明，40 NSFO-60 CNO不仅在温度循环时表现出良好的氧渗透通量可逆性，而且在CO2气氛中以及在高达950 °C的甲烷部分氧化为合成气的苛刻条件下具有良好的相稳定性。
We report a novel CO2-stable reduction-tolerant dual-phase oxygen transport membrane 40 wt% Nd0.6Sr0.4FeO3−δ–60 wt% Ce0.9Nd0.1O2−δ (40NSFO–60CNO), which was successfully developed by a facile one-pot EDTA–citric sol–gel method. The microstructure of the crystalline 40NSFO–60CNO phase was investigated by combined in situ X-ray diffraction (XRD), scanning electron microscopy (SEM), back scattered SEM (BSEM), and energy dispersive X-ray spectroscopy (EDXS) analyses. Oxygen permeation and long-time stability under CO2 and CH4 atmospheres were investigated. A stable oxygen flux of 0.21 cm3 min−1 cm−2 at 950 °C with undiluted CO2 as sweep gas is found which is increased to 0.48 cm3 min−1 cm−2 if the air side is coated with a porous La0.6Sr0.4CoO3−δ (LSC) layer. All the experimental results demonstrate that the 40NSFO–60CNO not only shows good reversibility of the oxygen permeation fluxes upon temperature cycling, but also good phase stability in a CO2 atmosphere and under the harsh conditions of partial oxidation of methane to synthesis gas up to 950 °C.