Abstract
The effect of the reactant stream addition of small quantities of carbon tetrachloride (TCM) on the conversion of methane has been studied on silica-supported Mg, Ca, Sr and Ba catalysts with and without the addition of lithium. In general both the conversions and selectivities were enhanced by the addition of TCM particularly with lithium added Ba/SiO 2. Consequently further experiments focussed on Ba/SiO 2 to which various alkali metals were added. For the LiBa/SiO 2 catalysts the effect of lithium content, time-on-stream, residence time, pressures of methane and oxygen and reaction temperature were studied. A qualitative mechanism for the TCM modified methane conversion process is discussed.
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