Modeling of the performance of BSCF capillary membranes in four-end and three-end integration mode
| Autor: | Silvia Lenaerts, Anita Buekenhoudt, Bart Michielsen, Vesna Middelkoop, C. Buysse, Jan Kretzschmar, Frans Snijkers |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Power station Capillary action Physics Process Chemistry and Technology Mode (statistics) Analytical chemistry chemistry.chemical_element Combustion Oxygen Surfaces Coatings and Films Electronic Optical and Magnetic Materials Membrane chemistry Materials Chemistry Ceramics and Composites Spinning |
| Zdroj: | Ceramics international |
| ISSN: | 0272-8842 |
| Popis: | Owing to their high surface-to-volume ratio, there has been an increasing research interest in mixed ionic electronic conducting (MIEC) capillary membranes for large-scale high temperature oxygen separation applications. They offer an energy-efficient solution for high temperature combustion processes in oxy-fuel and pre-combustion CO2 capture technologies used in fossil fuel power plants. In order to assess the effectiveness of these membranes in power plant applications, the impact of the geometry of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) capillaries on their performance in the three-end and four-end integration modes has been investigated and thoroughly discussed. The model's parameters were derived from four-end mode lab-scale experiments using gas-tight, macrovoid free and sulfur-free BSCF capillary membranes that were prepared by a phase-inversion spinning technique. The results of this modeling study revealed that in the four-end mode higher average oxygen fluxes and smaller total membrane areas can be obtained than in the three-end mode. This is due to the higher pO(2) gradient across the membrane wall. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
| Databáze: | OpenAIRE |
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