Abstract
Carbon Fuel Cells (CFCs) run on carbon-rich fuels such as coal and biomass. Owing to their high theoretical efficiencies, they have been studied for stationary power generation. This work presents the fabrication and operation of a 100W SOFC-based CFC stack, consisting of 5 bundles with 6 tubular cells per bundle. 8 mol%Y2O3-stabilized ZrO2 (8YSZ) electrolyte and layers of La0.8Sr0.2MnO3-8YSZ/La0.6Sr0.4Fe0.8Co0.2O3 cathode were coated on Ni-8YSZ anode support, with an active electrode area of 60cm2 per cell. 6 cells were embedded vertically on a fuel gas manifold and interconnected electrically in parallel within a bundle. 5 bundles were sealed and stacked in series electrically. The stack was connected to carbon fuel chambers containing mixture of activated carbon and potassium carbonate. The carbon fuel mixture was agitated with carbon dioxide to promote reverse Boudouard reaction, thus providing carbon monoxide as fuel. The stack and the fuel chambers were operated simultaneously in a heating furnace. The CFC stack showed 111.5W at 850°C and its average voltage degradation rate is 0.67 V/kh for 50 hours. The CFC stack degradation during long-term operation was analyzed and discussed as related to microstructural change, poisoning by impurities and electrochemical cell.
Original language | English |
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Title of host publication | Solid Oxide Fuel Cells 14, SOFC 2015 |
Editors | S. C. Singhal, K. Eguchi |
Publisher | Electrochemical Society, Inc. |
Pages | 2413-2419 |
Number of pages | 7 |
ISBN (Electronic) | 9781623322717 |
DOIs | |
Publication status | Published - 2015 |
Externally published | Yes |
Event | 14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, United Kingdom Duration: 26 Jul 2015 → 31 Jul 2015 |
Publication series
Name | ECS Transactions |
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Number | 1 |
Volume | 68 |
ISSN (Print) | 1938-6737 |
ISSN (Electronic) | 1938-5862 |
Conference
Conference | 14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage |
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Country/Territory | United Kingdom |
City | Glasgow |
Period | 26/07/15 → 31/07/15 |
Bibliographical note
Publisher Copyright:© The Electrochemical Society.