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• W2065871087 abstract "Potassium-lanthanide chloride molten salts (KCl–LnCl 3 , Ln = La, Ce, Sm, Dy and Yb) were used as catalysts for the oxidation of methane with N 2 O. They proved to be active and selective for the production of C 2 hydrocarbons (e.g. CH 4 conversion ≈ 15% and C 2 selectivity > 75% over the KCl–CeCl 3 catalyst at 750 °C) and remarkably stable for long periods of time on the gaseous stream (> 48 h). It was also found that their catalytic performance depends on the f block element (increases when La is replaced by Ce, Sm or Dy). The factors that seem to contribute to the variation of the activity and selectivity are the catalysts acid–base properties (higher acidity implies high activity, but lower selectivity to C 2 hydrocarbons) and the oxidative character of the rare earth trivalent ions in the potassium chloride molten melt (high oxidation-reduction potentials implies lower activity and higher selectivity to hydrocarbons). The effect of the type of oxidant was also studied. The potassium-lanthanide chloride molten salts were more selective to hydrocarbons under N 2 O than under O 2 , e.g. ≈ 75 vs. ≈ 40% over KCl–CeCl 3 , respectively, which is clearly an advantage taking into account that nitrous oxide is a major greenhouse agent. To our knowledge, this is the first time that molten metal chloride catalysts were used as catalysts for the catalytic conversion of methane into hydrocarbons using N 2 O as oxidant. Potassium-lanthanide chloride molten salts (KCl–LnCl 3 , Ln = La, Ce, Sm, Dy and Yb) were active and selective for the catalytic conversion of methane into C 2 hydrocarbons (Sel. > 75%) using N 2 O as oxidant. The catalytic behavior depends on the surface properties. • Catalytic conversion of CH 4 using N 2 O as oxidant reported for the first time over potassium-lanthanide chloride molten salts. • The catalysts are remarkably stable for long periods of time on stream. • The reaction main products are C 2 hydrocarbons. • The catalytic performance dependent on the rare earth ions properties." @default.
• W2065871087 created "2016-06-24" @default.
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• W2065871087 date "2014-03-01" @default.
• W2065871087 modified "2023-09-22" @default.
• W2065871087 title "Oxidative coupling of methane over KCl–LnCl3 eutectic molten salt catalysts" @default.
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• W2065871087 doi "https://doi.org/10.1016/j.molliq.2013.11.032" @default.
• W2065871087 hasPublicationYear "2014" @default.
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