Reaction Kinetics, Mechanisms and Catalysis

, Volume 105, Issue 1, pp 5–11 | Cite as

Relevance of the basicity of MO–Sm2O3 (M = Zn, Mg, Ca, Sr) mixed oxides for the efficiency of methane conversion to C2 + hydrocarbons

  • Ioan Balint
  • Akane Miyazaki
  • Dana Gingasu
  • Florica Papa


This article focuses on the catalytic behavior of MO–Sm2O3 (M = Zn, Mg, Ca, Sr) mixed oxides. The obtained results could be interpreted in terms of solid acid–base catalysis. The mixed oxides were prepared starting from the tartarate complexes of the constituent metals. The concentration as well as the evolution of surface carbonate species with the nature of MO and reaction temperature were analyzed by XRD and TPD methods. The amount of surface basic sites responsible for the formation of C2 + was determined by measuring the amount of evolved CO2 in the 300–800 °C temperature range. The catalytic behavior of the investigated mixed oxides was expressed in terms of methane yield to C2 + and the concentration of CO2 in reaction mixture. The conclusion is that C2 + is formed on the basic sites whereas the acidic sites are responsible for nonselective oxidation of methane to CO2.


Oxide surface basicity Oxidative coupling of methane Lanthanide-alkaline-earth oxides catalysts 



Financial supports by grants AMAP 32116 and BIOMONOXIS 62053 are greatly acknowledged.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2011

Authors and Affiliations

  • Ioan Balint
    • 1
  • Akane Miyazaki
    • 2
  • Dana Gingasu
    • 1
  • Florica Papa
    • 1
  1. 1.Institute of Physical Chemistry of the Romanian AcademyBucharestRomania
  2. 2.Department of Chemical and Biological Sciences, Faculty of ScienceJapan Women’s UniversityTokyoJapan

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