Enhanced coking resistance of a Ni cermet anode by a chromates protective layer
Ni-based anodes of SOFCs are susceptible to coking, which greatly limits practical application of direct methane-based fuels. An indirect internal reformer is an effective way to convert methane-based fuels into syngas before they reach anode. In this work, catalytic activity of a redox-stable perov...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier Inc.
2019
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| Online Access: | http://hdl.handle.net/20.500.11937/74337 |
| _version_ | 1848763246890188800 |
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| author | Chang, H. Chen, H. Yang, G. Zhou, W. Bai, J. Li, S. Shao, Zongping |
| author_facet | Chang, H. Chen, H. Yang, G. Zhou, W. Bai, J. Li, S. Shao, Zongping |
| author_sort | Chang, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Ni-based anodes of SOFCs are susceptible to coking, which greatly limits practical application of direct methane-based fuels. An indirect internal reformer is an effective way to convert methane-based fuels into syngas before they reach anode. In this work, catalytic activity of a redox-stable perovskite La0.7Sr0.3Cr0.8Fe0.2O3-d (LSCrFO) for methane conversion was evaluated. The catalyst was fabricated as an anodic protective layer to improve coking resistance of a Ni cermet anode. Using wet CH4 as a fuel, the LSCrFO-modified cell showed excellent power output and good coking resistance with peak power density of 1.59 W cm-2 at 800 °C. The cell demonstrated good durability lasting for at least 100 h. While the bare cell without the protective layer showed poor durability with the cell voltage fast dropped from 0.75 V to 0.4 V within 30 min. Under wet coal bed methane (CBM) operation, obvious performance degradation within 35 h (1.7 mV h-1) was observed due to the influence of heavy carbon compounds in CBM. The pre- and post-mortem microstructures and carbon analysis of the anode surface and catalyst surface were further conducted. |
| first_indexed | 2025-11-14T11:00:25Z |
| format | Journal Article |
| id | curtin-20.500.11937-74337 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:00:25Z |
| publishDate | 2019 |
| publisher | Elsevier Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-743372019-07-16T08:00:19Z Enhanced coking resistance of a Ni cermet anode by a chromates protective layer Chang, H. Chen, H. Yang, G. Zhou, W. Bai, J. Li, S. Shao, Zongping Ni-based anodes of SOFCs are susceptible to coking, which greatly limits practical application of direct methane-based fuels. An indirect internal reformer is an effective way to convert methane-based fuels into syngas before they reach anode. In this work, catalytic activity of a redox-stable perovskite La0.7Sr0.3Cr0.8Fe0.2O3-d (LSCrFO) for methane conversion was evaluated. The catalyst was fabricated as an anodic protective layer to improve coking resistance of a Ni cermet anode. Using wet CH4 as a fuel, the LSCrFO-modified cell showed excellent power output and good coking resistance with peak power density of 1.59 W cm-2 at 800 °C. The cell demonstrated good durability lasting for at least 100 h. While the bare cell without the protective layer showed poor durability with the cell voltage fast dropped from 0.75 V to 0.4 V within 30 min. Under wet coal bed methane (CBM) operation, obvious performance degradation within 35 h (1.7 mV h-1) was observed due to the influence of heavy carbon compounds in CBM. The pre- and post-mortem microstructures and carbon analysis of the anode surface and catalyst surface were further conducted. 2019 Journal Article http://hdl.handle.net/20.500.11937/74337 10.1016/j.jechem.2018.12.007 Elsevier Inc. restricted |
| spellingShingle | Chang, H. Chen, H. Yang, G. Zhou, W. Bai, J. Li, S. Shao, Zongping Enhanced coking resistance of a Ni cermet anode by a chromates protective layer |
| title | Enhanced coking resistance of a Ni cermet anode by a chromates protective layer |
| title_full | Enhanced coking resistance of a Ni cermet anode by a chromates protective layer |
| title_fullStr | Enhanced coking resistance of a Ni cermet anode by a chromates protective layer |
| title_full_unstemmed | Enhanced coking resistance of a Ni cermet anode by a chromates protective layer |
| title_short | Enhanced coking resistance of a Ni cermet anode by a chromates protective layer |
| title_sort | enhanced coking resistance of a ni cermet anode by a chromates protective layer |
| url | http://hdl.handle.net/20.500.11937/74337 |