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Main Title: Ceria-Based Dual-Phase Membranes for High-Temperature Carbon Dioxide Separation: Effect of Iron Doping and Pore Generation with MgO Template
Author(s): Gili, Albert
Bischoff, Benjamin
Simon, Ulla
Schmidt, Franziska
Kober, Delf
Görke, Oliver
Bekheet, Maged F.
Gurlo, Aleksander
Type: Article
Language Code: en
Abstract: Dual-phase membranes for high-temperature carbon dioxide separation have emerged as promising technology to mitigate anthropogenic greenhouse gases emissions, especially as a pre- and post-combustion separation technique in coal burning power plants. To implement these membranes industrially, the carbon dioxide permeability must be improved. In this study, Ce0.8Sm0.2O2−δ (SDC) and Ce0.8Sm0.19Fe0.01O2−δ (FSDC) ceramic powders were used to form the skeleton in dual-phase membranes. The use of MgO as an environmentally friendly pore generator allows control over the membrane porosity and microstructure in order to compare the effect of the membrane’s ceramic phase. The ceramic powders and the resulting membranes were characterized using ICP-OES, HSM, gravimetric analysis, SEM/EDX, and XRD, and the carbon dioxide flux density was quantified using a high-temperature membrane permeation setup. The carbon dioxide permeability slightly increases with the addition of iron in the FSDC membranes compared to the SDC membranes mainly due to the reported scavenging effect of iron with the siliceous impurities, with an additional potential contribution of an increased crystallite size due to viscous flow sintering. The increased permeability of the FSDC system and the proper microstructure control by MgO can be further extended to optimize carbon dioxide permeability in this membrane system.
Issue Date: 26-Aug-2019
Date Available: 17-Feb-2020
DDC Class: 570 Biowissenschaften; Biologie
Subject(s): samarium doped ceria
CO2 separation membranes
scavenging effect of iron
Sponsor/Funder: DFG, 414044773, Open Access Publizieren 2019 - 2020 / Technische Universität Berlin
Journal Title: Membranes
Publisher: MDPI
Publisher Place: Basel
Volume: 9
Issue: 9
Article Number: 108
Publisher DOI: 10.3390/membranes9090108
EISSN: 2077-0375
Appears in Collections:FG Keramische Werkstoffe » Publications

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