A Cobalt-Free Oxygen-Permeable Membrane Based on the Perovskite-Type Oxide Ba0.5Sr0.5Zn0.2Fe0.8O3–δ


  • H. Wang sincerely thanks the Alexander von Humboldt Foundation for financial support. The authors gratefully acknowledge the financial support of the BMBF for project 03C0343A under the auspices of ConNeCat.


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A Zn-containing perovskite structure of composition Ba0.5Sr0.5Zn0.2Fe0.8O3–δ is proposed as an oxygen-transport material with good phase stability at low oxygen partial pressures at temperatures up to 950 °C. The material has been successfully tested in a membrane reactor in the partial oxidation of methane to synthesis gas (see Figure).