Properties and performance of A-site deficient (Ba0.5Sr0.5)1−xCo0.8Fe0.2O3−δ for oxygen permeating membrane
Article
Article Title | Properties and performance of A-site deficient (Ba0.5Sr0.5)1−xCo0.8Fe0.2O3−δ for oxygen permeating membrane |
---|---|
ERA Journal ID | 1677 |
Article Category | Article |
Authors | Ge, Lei (Author), Zhou, Wei (Author), Ran, Ran (Author), Liu, Shaomin (Author), Shao, Zongping (Author), Jin, Wanqin (Author) and Xu, Nanping (Author) |
Journal Title | Journal of Membrane Science |
Journal Citation | 306 (1-2), pp. 318-328 |
Number of Pages | 11 |
Year | 2007 |
Place of Publication | Amsterdam, Netherlands |
ISSN | 0376-7388 |
1873-3123 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.memsci.2007.09.004 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0376738807006515?via%3Dihub |
Abstract | (Ba0.5Sr0.5)1-xCo0.8Fe0.2O3-δ (BSCF) (x = 0-0.3) oxides were prepared by a combined EDTA-citrate complexing method. The crystal structure, electrical conductivity, sintering behavior and oxygen desorption property of the oxides were studied by X-ray diffraction (XRD), four-probe direct current (DC) conductivity, environmental scanning electron microscopy (ESEM) and oxygen temperature-programmed desorption (O2-TPD) technologies, respectively. At x = 0.0-0.15, BSCF had a cubic perovskite structure, the lattice parameter and electrical conductivity both decreased steadily with increasing A-site deficiency. The A-site deficiency resulted in the increasing oxygen vacancy concentration in the lattice structure and improved the sintering of the oxides. BSCF (x = 0.03) showed the highest oxygen permeability with the flux reaching 3.5 × 10-6 mol cm-2 s-1 [STP: standard temperature and pressure] at 900 °C through a 1.0 mm thickness membrane. Long-term stability test of BSCF (x = 0.03) membrane at 850 °C indicated a slight deterioration of the permeation flux, which was attributed in part to the increased A-site deficiency of the bulk from Ba2+ and Sr2+ segregation over the membrane surface. |
Keywords | oxygen separation; mixed conducting; (Ba0.5Sr0.5)1−xCo0.8Fe0.2O3−δ; deficiency; inorganic membrane |
ANZSRC Field of Research 2020 | 340210. Solid state chemistry |
400409. Separation technologies | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Nanjing University of Technology, China |
Nanjing Tech University, China | |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5409/properties-and-performance-of-a-site-deficient-ba0-5sr0-5-1-xco0-8fe0-2o3-for-oxygen-permeating-membrane
180
total views6
total downloads0
views this month0
downloads this month