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Oxygen separating membrane manufactured from Ba0.5Sr0.5Co0.8Fe0.2O3−δ perovskite-like material

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Abstract

The dense thin membrane for oxygen separation was manufactured from Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) mixed oxide with perovskite-like structure prepared by the solid-state method. Properties of both powder and granulate (chemical and phase compositions, the specific surface area and the porosity) as well as sintered material (the apparent density, the apparent porosity, the water absorbability, the chemical composition, the crystallographic structure and microstructure), that affect the process of ion oxygen permeation through membrane, were determined. Parameters influencing on usable properties of membranes viz., the bending strength and the coefficient of thermal expansion were assessed as well. Effect of the sintering temperature on membrane structure was evaluated. The elaborated fabrication procedure enables one to manufacture membrane, in which microstructure is characterized by the presence of big grains as well as decreased concentration of grain boundaries. Measurements of the oxygen permeation through BSCF membrane revealed that the highest oxygen flux reaching 2.6 cm3 O2/(cm2 min) was obtained at 950°C under air and helium flows equal to 1 dm3 min−1.

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Acknowledgements

This scientific work was supported by the National Centre for Research and Development, within the confines of Research and Development Strategic Program ‘Advanced Technologies for Energy Generation’ project no. 2 ‘Oxy-combustion technology for PC and FBC boilers with CO 2 capture’, Agreement no. SP/E/2/66420/10. The support is gratefully acknowledged.

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Authors and Affiliations

  1. Institute of Power Engineering, Ceramic Department CEREL, Research Institute, 36-040, Boguchwała, Poland

    M GROMADA & J ŚWIDER

  2. Division of Chemistry and Technology of Fuels, Wroclaw University of Technology, 50-370, Wrocław, Poland

    J TRAWCZYŃSKI

  3. Laboratory of Fuel Cells, Institute of Power Engineering, Research Institute, 02-981, Warszawa, Poland

    M STEPIEŃ & M WIERZBICKI

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  1. M GROMADA
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  2. J ŚWIDER
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  3. J TRAWCZYŃSKI
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  4. M STEPIEŃ
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  5. M WIERZBICKI
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Correspondence to M GROMADA.

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GROMADA, M., ŚWIDER, J., TRAWCZYŃSKI, J. et al. Oxygen separating membrane manufactured from Ba0.5Sr0.5Co0.8Fe0.2O3−δ perovskite-like material. Bull Mater Sci 38, 23–28 (2015). https://doi.org/10.1007/s12034-014-0809-4

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  • DOI: https://doi.org/10.1007/s12034-014-0809-4

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