A CO2-Stable K2NiF4-Type Oxide (Nd0.9La0.1)2(Ni0.74Cu0.21Al0.05)O4+未 for Oxygen Separation

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• 作者：Yan Chen ; Qing Liao ; Yanying Wei ; Zhong Li ; Haihui Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：June 26, 2013
• 年：2013
• 卷：52
• 期：25
• 页码：8571-8578
• 全文大小：494K
• 年卷期：v.52,no.25(June 26, 2013)
• ISSN：1520-5045

文摘

A K₂NiF₄-type oxide (Nd_0.9La_0.1)₂(Ni_0.74Cu_0.21Al_0.05)O_4+未 (NLNCA) has been successfully synthesized by a sol鈥揼el method. The oxygen permeation and stability of the NLNCA membrane under CO₂ atmosphere were systematically studied. A steady oxygen permeation flux of 0.39 mL/(min路cm²) was obtained through the NLNCA membrane with a membrane thickness of 0.6 mm at 975 掳C when CO₂ was used as the sweep gas. More importantly, the oxygen permeation flux has no significant decrease during 250 h operation, which indicates that the NLNCA membrane is stable under CO₂. X-ray diffraction analysis of the spent membrane shows that the membrane retains K₂NiF₄-type structure and no carbonate was formed even exposed to CO₂ after 250 h operation. The results indicate that the NLNCA membrane has a great potential application in supplying oxygen for oxyfuel combustion with CO₂ capture. Moreover, the cost of the NLNCA is low, and it is beneficial for industrial application.