Research output: Contribution to journal › Article › peer-review
Vladislav A. Sadykov, Oleg F. Bobrenok, John Irvine, Oleksandr D. Vasylyev, Alevtina L. Smirnova, Natalia V. Mezentseva, Rimma V. Bunina, Galina M. Alikina, Anton I. Lukashevich, Vladimir I. Zaikovskii
Ni/YSZ or Ni/ScCeSZ cermets were promoted by up to 10 wt % of fluoritelike (Pr-Ce-Zr- O, La-Ce-Zr-O, and Ce-Zr-O) or perovskitelike (La-Pr-Mn-Cr-O) oxides and small (up to 1.4 wt %) amounts of Pt group metals (Pd, Pt, or Ru). Reactivity of samples, their lattice oxygen mobility, and their ability to activate methane were characterized by temperature-programed reduction by CH4. The catalytic properties of these samples in methane steam reforming were studied at 500-850 degrees C and short contact times (10 ms) in feeds with 8 mol % of CH4 and steam/methane ratio of 1: 3. Oxide promoters ensure stable performance of cermets in stoichiometric feeds at T > 650 degrees C by suppressing carbon deposition. Copromotion with precious metals enhances performance in the intermediate temperature (450-600 degrees C) range due to more efficient activation of methane. Factors determining specificity of these cermet materials' performance (chemical composition, microstructure, oxygen mobility in oxides, interaction between components, and reaction media effect) are considered. The most promising systems for practical application are Pt/Pr-Ce-Zr-O/Ni/YSZ and Ru/La-Pr-Mn-Cr-O/Ni/YSZ cermets demonstrating a high performance in the intermediate temperature range under broad variation in steam/CH4 ratio. [DOI: 10.1115/1.3117255]
Original language | English |
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Article number | 011005 |
Number of pages | 6 |
Journal | Journal of Fuel Cell Science and Technology |
Volume | 7 |
Issue number | 1 |
Early online date | 6 Oct 2009 |
DOIs | |
Publication status | Published - Feb 2010 |
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Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
ID: 2225082