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Separation Membranes (separation + membrane)
Selected AbstractsFabrication of Thin-Film SrCe0.9Eu0.1O3,, Hydrogen Separation Membranes on Ni,SrCeO3 Porous Tubular SupportsJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 8 2009Heesung Yoon SrCe0.9Eu0.1O3,, thin-film (,30 ,m) tubular hydrogen separation membranes were developed in order to obtain high hydrogen fluxes. Fifteen centimeters long, one end closed, NiO,SrCeO3 tubular supports were fabricated by tape casting, followed by rolling the green tape on a circular rod. SrCe0.9Eu0.1O3,, powders were prepared by the citrate process and coated on partially sintered NiO,SrCeO3 tubular supports. Leakage-free hydrogen membrane cells were obtained by adjusting the presintering and final sintering temperatures to reduce the difference of linear shrinkage rates between SrCe0.9Eu0.1O3,, thin films and NiO,SrCeO3 supports. A hydrogen flux of 2.2 cm3/min was obtained for the SrCe0.9Eu0.1O3,, on Ni,SrCeO3 tubular hydrogen separation membranes at 900°C using 25% H2 balanced with Ar and 3% H2O as the feed gas and He as the sweep gas. Thus, a 40% single pass yield of pure H2 was achieved with this membrane. [source] Determination of the operational pH value of a buffering membrane by an isoelectric trapping separation of a carrier ampholyte mixtureELECTROPHORESIS, Issue 5 2008Robert Y. North Abstract The operational pH value of a buffering membrane used in an isoelectric trapping separation is determined by installing the membrane as the separation membrane into a multicompartmental electrolyzer operated in the two-separation compartment configuration. A 3 Crystallization and Grain Growth Kinetics for Precipitation-Based Ceramics: A Case Study on Amorphous Ceria Thin Films from Spray PyrolysisADVANCED FUNCTIONAL MATERIALS, Issue 17 2009Jennifer L. M. Rupp Abstract The introductory part reviews the impact of thin film fabrication, precipitation versus vacuum-based methods, on the initial defect state of the material and microstructure evolution to amorphous, biphasic amorphous-nanocrystalline, and fully nanocrystalline metal oxides. In this study, general rules for the kinetics of nucleation, crystallization, and grain growth of a pure single-phase metal oxide thin film made by a precipitation-based technique from a precursor with one single organic solvent are discussed. For this a complete case study on the isothermal and non-isothermal microstructure evolution of dense amorphous ceria thin films fabricated by spray pyrolysis is conducted. A general model is established and comparison of these thin film microstructure evolution to kinetics of classical glass-ceramics or metallic glasses is presented. Knowledge on thermal microstructure evolution of originally amorphous precipitation-based metal oxide thin films allows for their introduction and distinctive microstructure engineering in devices-based on microelectromechanical (MEMS) technology such as solar cells, capacitors, sensors, micro-solid oxide fuel cells, or oxygen separation membranes on Si-chips. [source] Fabrication of Thin-Film SrCe0.9Eu0.1O3,, Hydrogen Separation Membranes on Ni,SrCeO3 Porous Tubular SupportsJOURNAL OF THE AMERICAN CERAMIC SOCIETY, Issue 8 2009Heesung Yoon SrCe0.9Eu0.1O3,, thin-film (,30 ,m) tubular hydrogen separation membranes were developed in order to obtain high hydrogen fluxes. Fifteen centimeters long, one end closed, NiO,SrCeO3 tubular supports were fabricated by tape casting, followed by rolling the green tape on a circular rod. SrCe0.9Eu0.1O3,, powders were prepared by the citrate process and coated on partially sintered NiO,SrCeO3 tubular supports. Leakage-free hydrogen membrane cells were obtained by adjusting the presintering and final sintering temperatures to reduce the difference of linear shrinkage rates between SrCe0.9Eu0.1O3,, thin films and NiO,SrCeO3 supports. A hydrogen flux of 2.2 cm3/min was obtained for the SrCe0.9Eu0.1O3,, on Ni,SrCeO3 tubular hydrogen separation membranes at 900°C using 25% H2 balanced with Ar and 3% H2O as the feed gas and He as the sweep gas. Thus, a 40% single pass yield of pure H2 was achieved with this membrane. [source]
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