The proposal describes a collaborative research project between North Carolina A&T State University (NCA&TSU), NC, Drexel University, PA, and the University of Aveiro, Portugal to develop catalytically active self organized nanostructured thin films for perovskite related membrane reactors. This problem is of major importance in materials development for synthesis of the syngas (CO+H2 ) and for the high purity oxygen separation. Dense mixed ionic electronic conducting perovskites with high oxygen ion conductivities form a basis for oxygen separation membranes by selective diffusion. They can be used to produce syngas by direct conversion of methane and other basic hydrocarbon gases. In order to facilitate the catalytic oxidation of the methane, the enlarged surface area and enhanced catalytic activity of the membrane permeateside surface is required. Therefore, the deposition of exchange/oxidation nanoporous catalytic layer is very desirable on the membrane surface.
The proposed research is expected to produce fundamental knowledge and understanding of the interrelationships between processing, structure, and catalytical activity of La-Sr-Cr-Fe(Al, Ni)-O based thin films deposited on the dense Sr(Fe, Al)O3perovskite membranes by pulsed laser deposition technique. It is expected that these newly developed thin films will have excellent catalytical properties to increase the rate of methane conversion at the same time providing the syngas with a required H2/CO ratio close to 2. This research will lead to the development of catalytically active dense perovskite membranes with an enhanced surface area and excellent structural stability for partial oxidation of methane exceeding that of currently used La-Sr-Fe-O ceramics.
Self-Organized Nanostructured Thin Films for Catalysis in Perovskite Related Membrane Reactors
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