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Topics in Catalysis

, 51:22 | Cite as

Oxidative Steam Reforming of Ethanol over Ni–Cu/SiO2, Rh/Al2O3 and Ir/CeO2: Effect of Metal and Support on Reaction Mechanism

  • Ouardia Akdim
  • Weijie Cai
  • Vanessa Fierro
  • Hélène Provendier
  • Andre van Veen
  • Wenjie Shen
  • Claude MirodatosEmail author
Original Paper

Abstract

The effect of metal and support on ethanol oxidative steam reforming (OSR) has been investigated over a series of stable and active catalytic systems with noble (Rh or Ir) and non noble metal (Ni–Cu) supported over neutral (SiO2), amphoteric (Al2O3) or redox (CeO2) supports. Ethanol decomposition and oxidative steam reforming was investigated by in situ diffuse reflectance infrared spectroscopy under temperature-programmed desorption and surface reaction conditions. Different mechanisms were established for these systems, from the initial steps of ethanol activation to the final equilibration of the decomposition products CO, CO2, H2 and H2O. Various intermediates such as formates, acetates and/or carbonates were found to play different roles depending on the catalyst composition. The stability and activity of the investigated systems were finally assigned to specific features of these mechanisms.

Keywords

Ethanol oxidative steam reforming Ni–Cu/SiO2 Rh/Al2O3 Ir/CeO2 DRIFT TPD TPR study 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Ouardia Akdim
    • 1
  • Weijie Cai
    • 1
    • 2
  • Vanessa Fierro
    • 1
    • 3
  • Hélène Provendier
    • 1
  • Andre van Veen
    • 1
  • Wenjie Shen
    • 2
  • Claude Mirodatos
    • 1
    Email author
  1. 1.Institut de Recherches sur la Catalyse et l’Environnement de Lyon, IRCELYON, UMR 5256, CNRS-Université Claude Bernard Lyon1Villeurbanne CedexFrance
  2. 2.State Key Laboratory of CatalysisDalian Institute of Chemical Physics, Chinese Academy of SciencesDalianChina
  3. 3.Laboratoire de Chimie du Solide MinéralUniversité Henri Poincaré-Nancy Université, UMR-CNRS 7555Vandoeuvre-les-NancyFrance

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