Breaking the dilemma of low selectivity in the oxidative coupling of methane over Mn-Na2WO4/SiO2 at low temperatures

Lin Xu,Anna Zanina, Kai Wu,Jianshu Li,Juan Chen,Yuming Li,Guiyuan Jiang,Evgenii V. Kondratenko

CHEMICAL ENGINEERING JOURNAL（2023）

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摘要

•Mn-Na2WO4/SiO2 oxidized CH4 with 87.3% C2+-hydrocarbons selectivity at 675 °C.•H2O reduces the reaction order of C2H6 formation with respect to O2 near to zero.•Low oxygen partial pressure intensifies the enhancing H2O effect on C2H6 formation.•The strength of this effect also increases with a decrease in reaction temperature.•Breaking the dilemma of low selectivity in the oxidative coupling of methane over Mn-Na2WO4/SiO2 at low temperatures.

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关键词

Oxidative coupling of methane,C2+-hydrocarbons,Low temperatures,Enhancing water effect,Reaction order

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