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The oxidative coupling of methane was examined over various rare earth-alkaline earthoxide complex catalysts in which the La-Ba-Na-O catalyst gave a higher C_2-yield more than 20% andshowed a considerable stability without a decrease during the period of a 500-h test.With a higherCH_4/O_2 ratio of 4:1 in mole,a C_2-selectivity of 65% and a C_2-yield of 19% were obtained.Thecatalyst combination effect was discussed.
The oxidative coupling of methane was examined over various rare earth-alkaline earthoxide complex catalysts in which the La-Ba-Na-O catalyst gave a higher C 2-yield of more than 20% and shoveled a considerable stability without a decrease during the period of a 500 -h test.With a higher CH 4 / O 2 ratio of 4: 1 in mole, a C_2-selectivity of 65% and a C_2-yield of 19% were obtained. The catalyst combination effect was discussed.