A new CO2-resistant Ruddlesden-Popper oxide with superior oxygen transport: A-site deficient (Pr0.9La0.1)(1.9)(Ni0.74Cu0.21Ga0.05)O4+delta

作者：Xue, Jian; Liao, Qing; Chen, Wei; Bouwmeester, Henny J M; Wang, Haihui; Feldhoff, Armin^*

来源：Journal of Materials Chemistry A, 2015, 3(37): 19107-19114.

DOI：10.1039/c5ta02514a

• A-site deficiencies
• High oxygens
• Membrane thickness
• Oxyfuel combustion
• Oxygen fluxes
• Oxygen transport
• Oxygen-permeation flux
• Ruddlesden-Popper

A-site deficient (Pr0.9La0.1)(1.9)Ni0.74Cu0.21Ga0.05O4+delta ((PL)(1.9)NCG), with the K2NiF4 structure, is found to exhibit higher oxygen transport rates compared with its cation-stoichiometric parent phase. A stable oxygen permeation flux of 4.6 x 10(-7) mol cm(-2) s(-1) at 900 degrees C at a membrane thickness of 0.6 mm is measured, using either helium or pure CO2 as sweep gas at a flow rate of 30 mL min(-1). The oxygen flux is more than two times higher than that observed through A-site stoichiometric (PL)(2.0)NCG membranes operated under similar conditions. The high oxygen transport rates found for (PL)(1.9)NCG are attributed to highly mobile oxygen vacancies, compensating A-site deficiency. The high stability against carbonation gives (PL)(1.9)NCG potential for use, e.g., as a membrane in oxy-fuel combustion processes with CO2 capture.

• 出版日期2015
• 单位华南理工大学