2583.     PASCAL, P., AND BOTOLESEN, E.  [Methane Synthesis From Carbon Monoxide and Water Vapor.]  Jour. usiness gaz. vol. 54, 1930, pp. 467-468; Compt. rend., vol. 191, 1930, pp. 186-187; Chem. Abs., vol. 24, 1930, p. 5282.

        When a mixture of CO and H₂O vapor in excess is passed over NiCO₃, prepared from Ni(NO₃)₂ by precipitation with MgCO₃ and forming by heating to 700°, the superposition of 2 limited reactions is observed, the first starting at 250° and yielding CH₄ quantitatively to 275°, above which temperature the second reaction, giving CO₂ and H₂, begins.  This reaction is appreciable at 300°, and at 750° the production of CH₄ is completely eliminated.  At the higher temperatures the % production of CO and H₂ increases while that of CO₂ and CH₄ diminishes.