3562.     ---------------.  [VIGNON, L.]  [Composition of Water Gas.]  Compt. rend., vol. 156, 1913, pp. 1995-1998; Chem. Abs., vol. 7, 1913, p. 3405.

        Water gas prepared by conducting H₂O vapor over coke, the ash of which contained 7-8% CaO, contained 3.45% CH₄, whereas water gas from C obtained from sugar, the ash of which contained 0.8% CaO, gave less than 2% CH₄, CO and CO₂ having been removed.  Mixing coke with CaO and passing  H₂O vapor over the mixture, there were obtained, with 11% CaO at 1,000°, 12% CH₄; with 13% CaO at 1,000°, 19% CH₄; with 33% CaO, 23%  CH₄, CO and CO₂ removed.  Following reactions take place:  (1) 4CO+2H₂O=3CO₂+CH₄; (2) 2CO+2H₂=CO₂+CH₄; (3) CO₂+4H₂=CH₄+2H₂O.