Abstract
The oxidative dimerization of methane was investigated at 750–850°C in Li2CO3-Na2CO3-K2CO3 immobilized within LiAlO2 or Li2TiO3 supports. Catalytic performance was enhanced with moderate melt decarbonation (i.e. with molten phase/LiAlO2 at 850°C: CH4 conversion of 25% and C2 yield of 12.5%), then dramatically fell with the precipitation of sodium and lithium oxide. The effect of the partial pressure of CO2 was analyzed. As in the case of binary carbonate eutectics, catalytic activity of the ternary melt was correlated with the presence of peroxide species. This activity was more important when using LiA1O2 support.
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