Carbon deposits are the most probable mode of deactivation for solid oxide fuel cell (SOFCs) using methane or higher hydrocarbons as fuel. The deposition of various carbon allotropes on the anode material was studied under dynamic and isothermal conditions. The results show methane dissociation on Ni-YSZ (nickel-yttrium stabilized zirconia) under the temperature-programmed mode in three general steps. Under isothermal conditions, various carbon species formed depending on the temperature. The presence of amorphous, filamentous, pyrolitic, and graphitic carbon allotropes was determined by quadrupole mass spectroscopy (QMS), X-ray crystallography, field emission scanning electron microscopy (FE-SEM), and infrared spectroscopy (IR). Carbon allotropes were subsequently oxidized in the atmosphere with 20.0 vol% and 0.5 vol% of oxygen in argon. Complex oxidation mechanisms were detected and discussed.
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December 2012
This article was originally published in
Journal of Fuel Cell Science and Technology
Research-Article
Deactivation of Ni-YSZ Material in Dry Methane and Oxidation of Various Forms of Deposited Carbon
Barbara Novosel,
Barbara Novosel
1
e-mail address: barbara.novosel@fkkt.uni-lj.si
1Corresponding author. Present address: University of Ljubljana, Faculty of Chemistry and Chemical Technology, POB 537, SI-1001 Ljubljana, Slovenia.
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Jadran Maček
Jadran Maček
Faculty of Chemistry and Chemical Technology and Center of Excellence Low-Carbon Technologies (CO NOT),
University of Ljubljana
,SI-1001 Ljubljana
, Slovenia
Search for other works by this author on:
Barbara Novosel
e-mail address: barbara.novosel@fkkt.uni-lj.si
Jadran Maček
Faculty of Chemistry and Chemical Technology and Center of Excellence Low-Carbon Technologies (CO NOT),
University of Ljubljana
,SI-1001 Ljubljana
, Slovenia
1Corresponding author. Present address: University of Ljubljana, Faculty of Chemistry and Chemical Technology, POB 537, SI-1001 Ljubljana, Slovenia.
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received March 22, 2012; final manuscript received July 13, 2012; published online October 22, 2012. Assoc. Editor: Masashi Mori.
J. Fuel Cell Sci. Technol. Dec 2012, 9(6): 061003 (7 pages)
Published Online: October 22, 2012
Article history
Received:
March 22, 2012
Revision Received:
July 13, 2012
Citation
Novosel, B., Marinšek, M., and Maček, J. (October 22, 2012). "Deactivation of Ni-YSZ Material in Dry Methane and Oxidation of Various Forms of Deposited Carbon." ASME. J. Fuel Cell Sci. Technol. December 2012; 9(6): 061003. https://doi.org/10.1115/1.4007272
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