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Dissertation
Integration of Reforming Catalyst into Metal-Supported Solid Oxide Fuel Cell Operating on Alternative Fuels
Washington State University
Doctor of Philosophy (PhD), Washington State University
2023
DOI:
https://doi.org/10.7273/000006400
Abstract
The work in this dissertation studies summarizes the efforts of integrating the internal reforming catalyst in metal-supported solid oxide fuel cell (MS-SOFC), especially for operation under ethanol steam reforming (ESR) conditions, with the objective to enhance the cell’s electrochemical performance and long-term stability. A 5 wt.% Rhodium-ceria zirconia (Rh/CZ) catalyst was found to have an exceptional performance towards ESR reaction when applied in front of conventional nickel-yttria-stabilized zirconia (Ni/YSZ) anode-supported and electrolyte-supported button cells. The catalyst was also infiltrated into the MS-SOFC via the precursor infiltration technique. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Energy Dispersive Spectroscopy (EDS) analysis reveal the infiltrated 5 wt.% Rh/CZ was uniformly dispersed within the porous metal support and could give more than 100 h of cell voltage stability during the constant current stability under ESR conditions by producing sufficient syngas and preventing coke formation.
Nickel-molybdenum-ceria-zirconia (NiMo/CZ) catalyst was tested as an alternative non-noble metal catalyst due to its capability to break the C-C bond, which can help enhance the ESR reaction. When applied in MS-SOFC, the cell showed excellent stability within 90 h before it was permanently deactivated due to coking.
Lastly, this dissertation shows an effort in regenerating MS-SOFC and reforming catalyst using air pulse. Since the MS-SOFC with non-noble metal catalyst is still prone to deactivation by coking, regenerations steps were performed by a short air pulse to the anode surface of MS-SOFC to burn-off carbon deposit and recover the cell performance. The MS-SOFC deactivated under ESR condition was recovered after 3 minutes of air pulsing at 700 °C. The long-term effect of air pulsing still needs to be investigated to observe how the regeneration steps will affect the MS-SOFC structural integration and stability during the operation in ethanol steam reforming conditions.
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Details
- Title
- Integration of Reforming Catalyst into Metal-Supported Solid Oxide Fuel Cell Operating on Alternative Fuels
- Creators
- Martinus Damitutsa Kurnia Dewa
- Contributors
- M. Grant Norton (Advisor)Su Ha (Advisor)Dustin McLarty (Committee Member)Min-Kyu Song (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- School of Mechanical and Materials Engineering
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 262
- Identifiers
- 99901087841101842
- Language
- English
- Resource Type
- Dissertation