Biofuels are receiving significant interest as a source for sustainable, locally produced hydrocarbon fuels. While solid-oxide fuel cells (SOFCs) can operate efficiently on biomass fuel streams, their use can prove problematic if process conditions are not carefully monitored, as carbon-deposit formation presents a significant risk. In this study, we examine the chemistry and transport processes underway when SOFC anodes are exposed to ethanol-steam mixtures. Through use of a unique Separated-Anode Experiment, this study decouples anode chemistry processes from charge-transfer, cathode-activation, and other electrochemical processes in an effort to focus on ethanol decomposition in SOFC environments. Experiments are combined with numerical simulations that include Dusty-Gas transport modeling within the anode pore structure, and elementary, multi-step heterogeneous and homogeneous chemical kinetics mechanisms representing fuel conversion within the anode. Process windows for deposit-free operation are postulated, and alternate anode architectures that minimize the risk of deposit formation are discussed.
- Nanotechnology Institute
Ethanol Transport and Chemistry in Solid Oxide Fuel Cells
- Views Icon Views
- Share Icon Share
- Search Site
Daggett, JM, Sullivan, NP, Kee, RJ, Zhu, H, & Dean, AM. "Ethanol Transport and Chemistry in Solid Oxide Fuel Cells." Proceedings of the ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. Denver, Colorado, USA. June 16–18, 2008. pp. 453-460. ASME. https://doi.org/10.1115/FuelCell2008-65229
Download citation file: