376.     BROWNING, L. C., AND EMMETT, P. H.  Equilibrium Measurements in the System C-CH4-H2.  Jour. Am. Chem. Soc., vol. 73, 1951, pp. 581-583; Chem. Abs., vol. 45, 1951, p. 4534.

       In the course of experiments relative to the Fe-Fe₃C-CH₄-H₂ equilibria, it was found that the C formed by the decomposition of Fe₃C reacted readily with H₂ at temperatures as low as 400°, the Fe catalyzing the reaction.  A study was made of the CH₄=C+2 H₂ equilibrium constants in the temperature range 380°-838°, using the C formed as above.  The values obtained are close to those for the reaction in which the C form is β-graphite.