Chemists at Ural Federal University have improved ceramic membranes that selectively release oxygen from gas mixtures. Scientists added manganese to the chemical composition of the material, which improved the selective oxygen permeability of the membranes. In other words, the new chemistry enabled the membranes to “scavenge” oxygen faster and deliver it more efficiently. A description of the research method and detailed calculations are published in the Journal of the European Ceramic Society.
“Such membranes can be used for the production of pure oxygen in medicine, for dosed oxygen delivery to chemical hydrocarbon partial oxidation reactors, and for oxygen extraction from gas mixtures. The scope of application of these materials is not limited to membrane technology. Due to their mixed oxygen-ion and electronic conductivity, they can be used in hydrogen power engineering as cathode materials for high-temperature solid oxide fuel cells. These are current sources that convert the energy of a chemical reaction into electrical energy in the most efficient and environmentally friendly way,” explains Evgeny Kiselev, associate professor at the Department of Physical and Inorganic Chemistry at UrFU.
The ceramic membranes are complex oxides of lanthanum, strontium, nickel, and manganese. The main advantages of the investigated membranes are their mechanical strength and chemical inertness to carbon dioxide compared to oxide membranes based on strontium, barium, iron and cobalt....
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