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

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• 作者：Wendelin Deibert^a ; ^{w.deibert@fz-juelich.de" class="auth_mail" title="E-mail the corresponding author} ; Falk Schulze-Kü ; ppers^a ; Emanuel Forster^b ; Mariya E. Ivanova^a ; Michael Mü ; ller^b ; Wilhelm A. Meulenberg^a
• 关键词：Hydrogen generation ; Ceramic membrane reactor ; Proton conductors ; Magnesium oxide ; Sequential tape-casting
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：37
• 期：2
• 页码：671-677
• 全文大小：2715 K

文摘

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 La_6-xWO_12-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.