464.    ---------------.[CHAKRAVARTY, K. M.]  Catalytic Formation of Methane From Carbon Monoxide and Hydrogen.  V.  Study of the Promotor Effect on Nickel Catalyst.  Jour. Indian Chem. Soc., vol. 15, 1938, pp. 245-248; Chem. Abs., vol. 32, 1938, p. 8742.

                 Reduction of Ni catalyst at a temperature of 300° is incomplete when it is prepared from pure Ni acetate.  Addition of a small quantity of a mixture of Ce nitrate and NH₄ vanadate or of Ce nitrate and Cr acetate helps in bringing about a more thorough reduction.  Thus catalysts of a reaction 2CO+2H₂=CO₂+CH₄ is accelerated by these promoters through their influence on the preparation of the Ni.  Whether the promoters have a direct effect on the reaction has not been settled.