Reforming of methane with carbon dioxide on active carbon-supported Co, Lacatalysts and reactivity of the catalysts

In the reforming of methane with CO2, cobalt catalyst supported on active c arbon exhibited reactivity higher than catalysts supported on any of the fo llowing: SiO2, Al2O3, SiO2-Al2O3 and MgO. The high reactivity of the cataly st support ed on active carbon is attributed to the fact that cobalt compou nds are easily reduced. By the addition of lanthanum (oxide) into the catal yst, the reactivity was further enhanced. Catalyst prepared from cobalt nit rate, as the starting material, exhibited activity higher than that of cata lysts prepared from other cobalt salts, bringing attention to the effect of starting materials. The interaction among the support, active carbon, and CO2 could be neglected at temperatures below 973 K. The three particular slates of adsorption of CO2 on the catalyst were confi rmed by IR measurements. The order of reactivity of the CO2, by adsorption states, was bidentate > unidentate > linear. It is significant to note that the bidentate adsorption species of CO2 increased with the addition of lan thanum.