Ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes
In this study, we report a novel approach for suppressing coke formation in direct-methane solid oxide fuel cells (SOFCs) with a conventional nickel cermet anode by simply adding ammonia to the fuel gas. Because ammonia preferentially occupies the acidic sites of the anode catalyst materials, a sign...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier SA
2013
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/31642 |
| _version_ | 1848753438728388608 |
|---|---|
| author | Wang, Wei Ran, R. Su, C. Guo, Y. Farrusseng, D. Shao, Zongping |
| author_facet | Wang, Wei Ran, R. Su, C. Guo, Y. Farrusseng, D. Shao, Zongping |
| author_sort | Wang, Wei |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this study, we report a novel approach for suppressing coke formation in direct-methane solid oxide fuel cells (SOFCs) with a conventional nickel cermet anode by simply adding ammonia to the fuel gas. Because ammonia preferentially occupies the acidic sites of the anode catalyst materials, a significant decrease in the coke formation rate is realized by introducing ammonia into the methane gas. In addition, hydrogen, a decomposition product of ammonia, also acts as an additional fuel for the SOFCs, resulting in high cell performance. At 700 °C, the coke formation rate over the Ni-YSZ anode is suppressed by 71% after the addition of 33.3% NH3 into CH4. Suppressed coke formation is also observed for other Ni catalysts such as Ni/Al2O3, a common catalyst for methane reforming that has been successfully used as the anode catalyst layer for SOFCs operating on methane, which suggests that introducing NH3 as an additive gas is a general method for suppressing the coke formation. The addition of ammonia can also effectively improve the power output and operational stability and offers a novel means for developing new coke-resistant SOFCs operating on widely available hydrocarbons for clean power generation to realize a sustainable future. |
| first_indexed | 2025-11-14T08:24:31Z |
| format | Journal Article |
| id | curtin-20.500.11937-31642 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:24:31Z |
| publishDate | 2013 |
| publisher | Elsevier SA |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-316422017-09-13T15:21:24Z Ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes Wang, Wei Ran, R. Su, C. Guo, Y. Farrusseng, D. Shao, Zongping Methane Coke formation Ammonia Solid oxide fuel cells In this study, we report a novel approach for suppressing coke formation in direct-methane solid oxide fuel cells (SOFCs) with a conventional nickel cermet anode by simply adding ammonia to the fuel gas. Because ammonia preferentially occupies the acidic sites of the anode catalyst materials, a significant decrease in the coke formation rate is realized by introducing ammonia into the methane gas. In addition, hydrogen, a decomposition product of ammonia, also acts as an additional fuel for the SOFCs, resulting in high cell performance. At 700 °C, the coke formation rate over the Ni-YSZ anode is suppressed by 71% after the addition of 33.3% NH3 into CH4. Suppressed coke formation is also observed for other Ni catalysts such as Ni/Al2O3, a common catalyst for methane reforming that has been successfully used as the anode catalyst layer for SOFCs operating on methane, which suggests that introducing NH3 as an additive gas is a general method for suppressing the coke formation. The addition of ammonia can also effectively improve the power output and operational stability and offers a novel means for developing new coke-resistant SOFCs operating on widely available hydrocarbons for clean power generation to realize a sustainable future. 2013 Journal Article http://hdl.handle.net/20.500.11937/31642 10.1016/j.jpowsour.2013.04.014 Elsevier SA restricted |
| spellingShingle | Methane Coke formation Ammonia Solid oxide fuel cells Wang, Wei Ran, R. Su, C. Guo, Y. Farrusseng, D. Shao, Zongping Ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes |
| title | Ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes |
| title_full | Ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes |
| title_fullStr | Ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes |
| title_full_unstemmed | Ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes |
| title_short | Ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes |
| title_sort | ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes |
| topic | Methane Coke formation Ammonia Solid oxide fuel cells |
| url | http://hdl.handle.net/20.500.11937/31642 |