Oxygen Ion-Conducting Ceramic Membranes for High-Temperature Applications

Reference	Presenter	Authors (Institution)	Abstract
06-181	Olivier Guillon	Guillon, O.(Forschungszentrum Jülich GmbH); Baumann, S.(Forschungszentrum Jülich GmbH); Liu, Y.(Forschungszentrum Jülich GmbH); Schulze-Küppers, F.(Forschungszentrum Jülich GmbH); Deibert, W.(Forschungszentrum Jülich GmbH); Ivanova, M.E.(Forschungszentrum Jülich GmbH); Unije, U.(Forschungszentrum Jülich GmbH); Mücke, R.(Forschungszentrum Jülich GmbH); Meulenberg, W.A.(Forschungszentrum Jülich GmbH and University of Twente);	Oxide ceramic membranes for the separation of oxygen or hydrogen from gas mixtures are of great interest due to their high efficiency and practically infinite selectivity. Supported membrane structures are envisaged for applications in oxygen and hydrogen generation for gas supply in e.g. power plants, glass, cement or steel production, as well as for chemical or petrochemical applications and for green energy generation. Ion-conducting ceramic catalytic membrane reactors offer an opportunity to combine membrane separation processes directly with chemical reactions, leading to process intensification and, hence, benefits with regard to efficiency. Current research activities focus on membrane reactors due to their high intrinsic efficiency and great potential for the production of a large variety of commodity chemicals, energy carriers, and synthetic fuels. This includes the reduction of CO 2 emissions and the utilisation of CO 2 . The first part of the presentation is related to material selection for dense Oxygen Transport Membranes (OTM) and the processing of a planar thin film design. In addition, the transport limitations of thin film structures are discussed. Especially the polarisation effect in the support is addressed by CFD modelling. The second part of the presentation focuses on different concepts and principles of membrane reactor operation followed by a comprehensive overview of ongoing research activities regarding ceramic ion-conducting membrane reactors within the last ten years in the light of sustainable energy and chemical production. The different application cases are discussed from the authors’ current perspective. The development levels are very different and mostly at very low technology readiness levels (TRLs). Therefore, the demonstration of catalytic 2 membrane reactors at a commercially relevant size is urgently required in order to initiate more focussed research and development.
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