Critical influence of Mn on low-temperature catalytic activity of Mn/Na2WO4/SiO2 catalyst for oxidative coupling of methane

Oxidative coupling of methane (OCM) was investigated in the temperature range 370-775 °C over Mn/Na2WO4/SiO2 catalysts with different loadings of manganese in integral-mode conditions. Na2WO4/SiO2 shows no activity at low temperature (370 °C), whereas Mn-doped catalyst exhibits 14% C2+ yield under s...

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Bibliographic Details
Published in:Catalysis letters 2002-11, Vol.84 (1-2), p.45-51
Main Authors: MALEKZADEH, A, ABEDINI, M, KHODADADI, A. A, AMINI, M, MISHRA, H. K, DALAI, A. K
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Catalytic activity
Catalytic reactions
Chemistry
Coupling
Exact sciences and technology
General and physical chemistry
Low temperature
Manganese
Methane
Partial pressure
Silicon dioxide
Sodium tungstate
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Oxidative coupling of methane (OCM) was investigated in the temperature range 370-775 °C over Mn/Na2WO4/SiO2 catalysts with different loadings of manganese in integral-mode conditions. Na2WO4/SiO2 shows no activity at low temperature (370 °C), whereas Mn-doped catalyst exhibits 14% C2+ yield under similar reaction conditions, indicating that manganese plays a critical role in low-temperature methane coupling reaction. Partial pressure of oxygen in the feed also influences the low-temperature OCM activity of the catalysts.
ISSN:1011-372X
1572-879X
DOI:10.1023/A:1021020516674