Preliminary results are reported for the oxidative coupling of methane to give ethane/ethylene mixtures over a series of different catalyst formulations; the temperature range studied is 650–850°C. A comparison is made of the behaviour of lead/alumina and lithium/magnesia materials. It is found that the former samples give ethane and ethylene plus a predominance of CO2 whereas the latter give ethane and ethylene plus a mixture of CO, CO2 and H2; at higher temperatures, the lead materials give also H2 and CO. The lithium-containing materials are much more stable than the lead-containing ones; the latter lose lead, probably by volatilisation of the metal. A number of other oxide materials have also been examined and have been found to be less effective, having lower activities and selectivities than the lead- and lithium-containing systems.
Roos, J. A., Bakker, A. G., Bosch, H., van Ommen, J. G., & Ross, J. R. H. (1987). Selective oxidation of methane to ethane and ethylene over various oxide catalysts. Catalysis today, 1(1-2), 133-145. https://doi.org/10.1016/0920-5861(87)80034-2