2004.    ---------------.  [KUBOKAWA, M.]  [Decomposition of Methane on Reduced Nickel.]  Rev. Phys. Chem. Japan, vol. 12, 1938, pp. 90-104; Chem. Abs., vol. 33, 1939, p. 1579.

       Equilibrium constant and the reaction velocity of the catalytic decomposition of CH₄ on reduced Ni were measured in the temperature range 420°-500° below 30 mm. pressure.  The reaction velocity in the initial stage is given by:  dx/dt=k(a-x)/xⁿ, where a is the initial amount of CH₄, x the decomposed amount at time t, k, and n constants.  The retardation exponent, n, was always larger than unity when the catalyst was activated by reduction with H₂, and it became smaller than 1 when the catalyst was used repeatedly without being reduced and also when temperature was lowered.  No effect of added H₂ was observed.  These results agree with those for Pt catalyst.