Abstract
The performance of catalysts derived from LaCo1−xCuxO3 (x = 0.0 or 0.2) perovskite-type oxides for steam reforming (SR) and oxidative SR of ethanol at 773 K was evaluated. All catalysts deactivated during SR of ethanol. In the absence of Cu, the increase of calcination temperature from 873 to 1,073 K did not affect the stability of the samples. On the other hand, for the samples containing Cu, it was detected a higher rate of deactivation when the calcination temperature was increased. The loss of activity of LaCoO3 was attributed to the oxidation of Co metallic particles and amorphous carbon formation as revealed by in situ XAFS and thermogravimetric analyses. The addition of Cu favored the formation of carbon filaments. Moreover, the presence of oxygen in the feed decreased the carbon formation, improving the stability of the catalysts.
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Acknowledgements
Andressa A. A. da Silva and Mauro C. Ribeiro acknowledge the scholarship received from CNPq. This work received financial support of CTENERG/FINEP-01.04.0525.00. The authors thank also LNLS for the support and beamline time under project # D04B-XAFS-1, 14405. The work carried out at the CAER was supported in part by funding from the Commonwealth of Kentucky. Argonne’s research was supported in part by the U.S. Department of Energy (DOE), Office of Fossil Energy, National Energy Technology Laboratory (NETL)under Project AA-10-15; 49261-00-107. The use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract DE-AC02-06CH11357. MRCAT operations are supported by the Department of Energy and MRCAT member institutions.
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da Silva, A.A.A., Ribeiro, M.C., Cronauer, D.C. et al. Ethanol Reforming Reactions Over Co and Cu Based Catalysts Obtained from LaCoCuO3 Perovskite-Type Oxides. Top Catal 57, 637–655 (2014). https://doi.org/10.1007/s11244-013-0222-z
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DOI: https://doi.org/10.1007/s11244-013-0222-z