Abstract Ceramic oxide membranes are widely being researched for Carbon Capture and Storage/Utilization sector applications. Foreseen applications of these membranes are oxygen generation for oxyfuel combustion in e.g. power plants, glass-, cement- or steel production. Major drawback with Mixed Ionic and Electronic Conducting (MIEC) perovskite structure membranes is their limited long term stability at high temperatures in aggressive atmospheres. Dual phase composite membranes have been reported to excel overcoming this drawback. In addition to performance evaluation, Ce0.8Gd0.2O2-δ – FeCo2O4 (CGO-FCO) membranes were subjected to stability test in flue gas conditions closely mimicking industrial flue gas atmosphere. The dual phase composites are investigated for their phase stability at the operating temperature of 850 °C in a gradient of oxygen chemical potential. The composites were also exposed to a series of gas mixtures over a period of time at their operating temperature to test for the chemical stability. CGO-FCO membranes are identified to possess chemical stability in gas mixtures of CO2, SO2 along with oxygen over a period of 200 h at 850 °C under oxygen partial pressure gradient.

中文翻译：

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高性能 Ce 0.8 Gd 0.2 O 2-δ - FeCo 2 O 4 双相氧传输膜的结构和化学稳定性

摘要 陶瓷氧化物膜正被广泛研究用于碳捕获和储存/利用部门的应用。这些膜的预期应用是在发电厂、玻璃、水泥或钢铁生产中为富氧燃烧产生氧气。混合离子和电子导电 (MIEC) 钙钛矿结构膜的主要缺点是它们在腐蚀性环境中的高温下的长期稳定性有限。据报道，双相复合膜能够克服这一缺点。除了性能评估外，Ce0.8Gd0.2O2-δ – FeCo2O4 (CGO-FCO) 膜在与工业烟气气氛非常相似的烟气条件下进行了稳定性测试。研究了双相复合材料在 850 °C 的操作温度和氧化学势梯度下的相稳定性。复合材料还在其操作温度下在一段时间内暴露于一系列气体混合物中以测试化学稳定性。经鉴定，CGO-FCO 膜在 850 °C 和氧气分压梯度下，在 CO2、SO2 和氧气的气体混合物中具有化学稳定性，可在 200 小时内保持稳定。