期刊
APPLIED CATALYSIS A-GENERAL
卷 526, 期 -, 页码 84-94出版社
ELSEVIER
DOI: 10.1016/j.apcata.2016.08.010
关键词
OSRE; Ce-Pr; Ni-Co; Hydrotalcite; Stability
资金
- COLCIENCIAS - Universidad Nacional de Colombia [201010014518, 715 of 2009]
- Fondo de Investigacion de la Universidad Nacional de Colombia-DIB [11484, 14803]
This article presents a study of the catalytic stability of Ni and Co mixed oxides promoted with 5 wt% Ce or Pr in the oxidative steam reforming of ethanol (OSRE). The catalysts were obtained by the calcination of hydrotalcite-type precursors (HT) prepared by the co-precipitation method and the reconstruction of the HT phase in the presence of aqueous (Ce/Pr-EDTA) complexes. The solids were characterized by X ray-diffraction (XRD), surface area (BET), X-ray fluorescence (XRF), temperature-programmed reduction (TPR-H-2), and temperature-programmed desorption of CO2 (TPD-CO2) and O-2 (TPD-O-2), and they were additionally evaluated in the OSRE for 100 h. The stability tests indicate that the presence of rare earths promotes a reduction of the precursors of coke. These results evidence the fundamental role of the lattice oxygen and the reducibility of the oxide phases. (C) 2016 Elsevier B.V. All rights reserved.
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