Journal Article

PreJuSER-15949

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ultrahigh oxygen permeation flux through supported Ba0.5Sr0.5Co0.8Fe0.2O3 membranes

Baumann, S.FZJ* ; Serra, J. M. ; Lobera, M. P. ; Escolastico, S. ; Schulze-Küppers, F.FZJ* ; Meulenberg, W. A.FZJ*

2011
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.memsci.2011.04.050

Abstract: Oxygen transport membranes made of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) were manufactured by tape casting and co-firing. The disk-shaped membranes consisted of a top gastight layer (70 mu m thick) and a porous substrate (830 mu m thick) with 34% open porosity. The variation of the permeation operation conditions allowed (i) the identification of the different limitations steps in the permeation process, i.e., bulk oxygen ion diffusion, catalytic surface exchange and gas phase diffusion in the membrane compartments and porous substrate, and (ii) the ultimate optimization of the oxygen flux. The variables considered in the systematic permeation study included the inlet gas flow rate of the sweep and air feed, the temperature and the nature of the oxygen feed gas (air or pure oxygen). Moreover, the influence of the deposition of a catalytic activation layer (17 mu m thick) made of BSCF on top of the thin gastight layer was investigated. As a result of this parametric study, unpreceded oxygen flux values were achieved, i.e., a maximum flux of 67.7 ml(STP) min(-1) cm(-2) was obtained at 1000 degrees C using pure oxygen as the feed and argon as the sweep, while a flux of 12.2 ml(STP) min(-1) cm(-2) at 1000 degrees C was obtained when air was used as the feed. (C) 2011 Elsevier BM. All rights reserved.

Keyword(s): J ; Oxygen transport membrane (auto) ; Supported membrane (auto) ; Oxygen flux (auto) ; BSCF (auto) ; Oxygen separation (auto)

Note: Financial support from the Spanish Ministry for Science and Innovation (Project ENE2008-06302 and FPI Grant JAE-Pre 08-0058), EU through FP7 NASA-OTM Project (NMP3-SL-2009-228701), and the Helmholtz Association of German Research Centres through the Helmholtz Alliance MEM-BRAIN (Initiative and Networking Fund) is kindly acknowledged. Mrs H. Burlet has contributed to this work with the careful revision of the English language.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellverfahren (IEK-1)

Research Program(s):

1. Rationelle Energieumwandlung (P12)
2. NASA-OTM - NAnostructured Surface Activated ultra-thin Oxygen Transport Membrane (228701) (228701)

Appears in the scientific report 2011

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