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Chinese Journal of Catalysis 2006, Vol. 27 Issue (8) :678-682     DOI:
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Effect of Na2SO4 on Structure and Catalytic Properties of Mn/SiO2 for the Oxidative Coupling of Methane
HOU Sicong, XIONG Wei, LIU Lingtao, CAO Yuan, LIU Haichao*, KOU Yuan*
State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

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Abstract The oxidative coupling of methane to C2 hydrocarbons (C2H4 and C2H6) was examined on Mn-Na2SO4/SiO2. The catalysts were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, laser Raman spectroscopy, and temperature-programmed reduction with H2. The addition of Na2SO4 to Mn/SiO2 led to the exclusive transformation of amorphous SiO2 to α-cristobalite and the concurrent oxidation of Mn3O4 to Mn2O3. The observed effects on the structure and catalytic performance suggest that Mn2O3 species act as the active sites for the methane activation, which may provide the basis for the rational design of new efficient catalysts for the oxidative coupling of methane.
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Keywordsoxidative coupling of methane   active site   manganese sesquioxide   silica   supported catalyst   sodium sulfate     
Received 2006-08-25; published 2006-08-25
Cite this article:   
HOU Sicong, XIONG Wei, LIU Lingtao, CAO Yuan, LIU Haichao*, KOU Yuan*.Effect of Na2SO4 on Structure and Catalytic Properties of Mn/SiO2 for the Oxidative Coupling of Methane[J]  Chinese Journal of Catalysis, 2006,V27(8): 678-682
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