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- W2063296747 abstract "The activity and the selectivity of two catalysts for methane coupling, namely 2% Li2O/Y2O3 and LiYO2, have been studied and analysed under both steady state and non-steady state conditions in the temperature range 670–760 °C. The role of the surface reaction and the characterisation of the surface species active in the catalytic reaction were the main goals of the investigation. With this aim, the investigation was centred on the analysis of some important effects on catalyst activity and selectivity: the effect of the ratio of methane to oxygen; that of the temperature; that of the contact time. With the same aim, a study was carried out under transient conditions at the very beginning of the reaction and an analysis of the apparent activation energy was made. The whole set of experiments was completed by a study of the reactivity of ethane, and its ability to undergo dehydrogenation and formation of ethylene under the same conditions of methane coupling. It was possible therefore to detect the strong adsorption of CO2 even at such high temperatures and its importance in reducing selectivity to C2-hydrocarbons; moreover the surface plays an important role in the overall reaction up to about 700 °C for Li2O/Y2O3 and up to about 730 °C forLiYO2. This result is confirmed also by the evidence that the apparent activation energy is higher at the lowest temperatures for both catalysts." @default.
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- W2063296747 date "1997-06-01" @default.
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- W2063296747 title "Analysis of the properties of lithium-yttrium catalysts for methane coupling" @default.
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- W2063296747 doi "https://doi.org/10.1016/s0254-0584(96)01920-7" @default.
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