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041 _ _ |a English
100 1 _ |a Unije, Unoaku Victoria
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111 2 _ |a Geodict Usermeeting 2017
|c Kaiserslautern
|d 2017-09-26 - 2017-09-27
|w Germany
245 _ _ |a The effect of two different support microstructure of an asymmetric membrane with comparable porosities on flux
260 _ _ |c 2017
336 7 _ |a Conference Paper
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520 _ _ |a Oxygen transport membranes (OTM) display a new technology for the generation of energy-efficient oxygen. These membranes can be used in low-pollutant power plants and oxygen generators or membrane reactors in the chemical industry and health care. Research studies over the years have found that the thinner the dense membrane, the higher the observed flux, but the lower the mechanical stability. This motivated the state of the art processing of an asymmetric membrane; whereby the thin dense membrane is supported by a porous structure. However, the microstructure of the porous support in the membrane assembly affects the overall flux significantly. To study and optimize this effect, tape cast and freeze cast Ba0.5Sr0.5(Co0.8Fe0.2)0.97Zr0.03O3– (BSCFZ) asymmetric membranes having comparable support porosities but different pore architecture were processed. Permeation measurements showed that the flux from the two membranes yielded comparable flux, which is not in agreement to literature.A computer tomography of the membranes was acquired to understand, simulate and optimize the porous support. This effect was simulated by applying the binary friction model (BFM) for the support together with a modified Wagner equation for the dense membrane, using transport relevant parameters obtained from computer tomography data of the freeze cast, and tape cast support using Geodict software.
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|a HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406)
700 1 _ |a Mücke, R.
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700 1 _ |a Schulze-Küppers, F.
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700 1 _ |a Baumann, S.
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700 1 _ |a Guillon, O.
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