Investigations of solid oxide-based carbon fuel cells : modeling and experiments
Abstract/Contents
- Abstract
- Solid oxide-based carbon fuel cells (SO-CFCs) provide an efficient energy conversion of carbon into electricity. Furthermore, by keeping the fuel and the air physically separated, a near-capture ready product stream of CO2 is produced. To further our understanding of this promising energy technology, three areas of investigations are presented herein. First, a set of experiments run on CO, H2, and syngas fuel are performed to gain insight into the electrochemical reactions occurring on the anode surface. Current-voltage curves and electrochemical impedance spectra are measured and analyzed, and kinetic parameters are extracted. Second, a previously established comprehensive SO-CFC model is further developed and executed. In particular, the effects of fuel-bound hydrogen on SO-CFC performance is investigated, and design and operational parameters of a commercially viable tubular SO-CFC is explored. Finally, a thermodynamic analysis of sulfur uptake by solid sorbents is performed and visualized using C-H-O ternary diagrams. Sulfur-poisoning is one of the major hurdles for commercialization of the SO-CFC technology. The analysis shows that there is a small window of opportunity at a cell voltage of 0.65-0.7 V where the abundant calcium sorbent is able to bring the H2S and COS mole fractions down to low ppmv levels, enabling the utilization of sulfur-containing carbonaceous fuels in the SO-CFC.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2020; ©2020 |
| Publication date | 2020; 2020 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Johnson, David Urnes |
|---|---|
| Degree supervisor | Mitchell, Reginald |
| Thesis advisor | Mitchell, Reginald |
| Thesis advisor | Chueh, William |
| Thesis advisor | Gür, Turgut M |
| Degree committee member | Chueh, William |
| Degree committee member | Gür, Turgut M |
| Associated with | Stanford University, Department of Mechanical Engineering |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | David Urnes Johnson. |
|---|---|
| Note | Submitted to the Department of Mechanical Engineering. |
| Thesis | Thesis Ph.D. Stanford University 2020. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2020 by David Urnes Johnson
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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