REACTION OF METHANE WITH CARBON-DIOXIDE B Y THE LNFEO(3) (LN=LA, PR, ND, SM, GD) CATALYSTS

The reactions of methane with carbon dioxide were carried out at 1073 K over the perovskite-type catalysts, LnFeO(3)(Ln=La, Pr, Nd, Sm, Gd). The order of the reaction activities was La>Pr>Nd>Sm>Gd. From the res ults of XPS measurement the decline to the ionic character of the Fe-O bond led to the decrease of the activity. The catalyst having the cha racter that is rich in acidic or basic property, especially in the for mer case, exhibited the low selectivity to hydrogen. The NdFeO3 cataly st, which has the same amount of both acidity and basicity gave the hi ghest selectivity to hydrogen.