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dc.contributor.authorWang, Wei
dc.contributor.authorRan, R.
dc.contributor.authorSu, C.
dc.contributor.authorGuo, Y.
dc.contributor.authorFarrusseng, D.
dc.contributor.authorShao, Zongping
dc.identifier.citationWang, W. and Ran, R. and Su, C. and Guo, Y. and Farrusseng, D. and Shao, Z. 2013. Ammonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes. Journal of Power Sources. 240: pp. 232-240.

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.

dc.publisherElsevier SA
dc.subjectCoke formation
dc.subjectSolid oxide fuel cells
dc.titleAmmonia-mediated suppression of coke formation in direct-methane solid oxide fuel cells with nickel-based anodes
dc.typeJournal Article
dcterms.source.titleJournal of Power Sources
curtin.accessStatusFulltext not available

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