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| Home > Publications database > Insights into Degradation and Material Interactions of a Solar-Powered MIEC Membrane Reactor for Hydrogen |
| Home > Publications database > Insights into Degradation and Material Interactions of a Solar-Powered MIEC Membrane Reactor for Hydrogen |
| Conference Presentation (After Call) | FZJ-2026-04628 |
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2026
Abstract: Mixed ionic-electronic conducting (MIEC) membranes enable a thermal pathway for hydrogen and synthesis gas production from biomethane and steam. Oxygen Transport Membranes significantly reduce the required process temperature from 1500 °C to below 1000 °C [1]. Within the national funded MESOWAS project a solar thermal membrane stack reactor was developed. This modular reactor is scalable and uses planar oxygen transport membranes (OTM) made of Sr0.97Ti0.75Fe0.25O3- (STF25). [2]. The gas-tight separation of the reaction chambers was achieved using composite glass seals (barium-calcium silicate) with silver, ensuring mechanical and chemical stability [3]. The reactor was tested under direct solar irradiation and high temperature at the DLR solar simulator (Germany) with water vapour and methane to achieve the required chemical potential for oxygen transport. The post-test investigation of the membrane module revealed critical insights into degradation processes and material interactions that occur during operation. This presentation introduces the module design and methodology of the membrane module autopsy, including the disassembly process for subsequent analysis, and addresses:- Corrosive changes in building materials and their effects on the sealing integrity of glass composite materials,- Effects of the structural design on the mechanical stress distribution within the module and the membranes,- Interactions between membranes, process gases and construction materials,The results form a basis for the further development of membrane modules, the optimisation of material combinations, joining techniques and construction designs to improve long-term stability and performance in application.[1] X.Y. Wu, L. Chang, M. Uddi, P. Kirchen, A.F. Ghoniem, Toward enhanced hydrogen generation from water using oxygen permeating LCF membranes, Phys. Chem. Chem. Phys. 17 (2015) 10093–10107. https://doi.org/10.1039/c5cp00584a.[2] C. Hall, F. Schulze‐Küppers, K. Bittner, B. Büddefeld, N. Margaritis, J. Wolters, S. Groß‐Barsnick, J.P.R. Duarte, N.C. Neumann, G. Natour, A Proof‐of‐Concept Membrane Module Concept for Solar Thermal Water Splitting Using Oxygen Transport Membranes, Energy Technol. (2025) 2402191. https://doi.org/10.1002/ente.202402191.[3] X. Li, S.M. Groß-Barsnick, T. Koppitz, S. Baumann, W.A. Meulenberg, G. Natour, Sealing behaviour of glass-based composites for oxygen transport membranes, J. Eur. Ceram. Soc. 42 (2022) 2879–2891. https://doi.org/10.1016/j.jeurceramsoc.2022.01.052.
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