3560.     VIGNON, L.  [Action of Water Vapor on Carbon in the Presence of Lime.]  Compt. rend., vol. 152, 1911, pp. 871-874; Chem. Abs., vol. 5, 1911, p. 2044.

        If water vapor is allowed to act upon a mixture of C and CaO at 600-800, H2, CH4, and some C2H4 are formed besides CO and CaCO3.  The mixture of CaO and C decomposes H2O more rapidly and at lower temperature than C alone.  Much H2O and long heating reduce the amount of CH4 as the latter is decomposed by the H2O to CO and H2.