Stability and sintering of MgO as a substrate material for Lanthanum Tungstate membranes

The performance of ceramic gas separation membranes can be increased by reducing their thickness. To maintain the mechanical stability of the membrane, a supporting structure is needed. In this work magnesium oxide (MgO) is identified as support material for H2-separation membranes made of La6-xWO12...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2017-02, Vol.37 (2), p.671-677
Main Authors: Deibert, Wendelin, Schulze-Küppers, Falk, Forster, Emanuel, Ivanova, Mariya E., Müller, Michael, Meulenberg, Wilhelm A.
Format: Article
Language:English
Subjects:
Ceramic membrane reactor
Hydrogen generation
Magnesium oxide
Proton conductors
Sequential tape-casting
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Summary:The performance of ceramic gas separation membranes can be increased by reducing their thickness. To maintain the mechanical stability of the membrane, a supporting structure is needed. In this work magnesium oxide (MgO) is identified as support material for H2-separation membranes made of La6-xWO12-δ (LaWO). Therefore MgO is tested under application-related conditions in a water-gas-shift (WGS) catalytic membrane reactor for hydrogen production and shows a good stability. The sequential tape casting serves as the manufacturing method for the preparation of the asymmetric membrane structures. To show the compatibility of the two materials, detailed investigations of the sintering behaviour and stability tests are performed and show the well-matching properties of the two materials. Microstructural analyses reveal the inter-diffusion between LaWO and MgO.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2016.09.033