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.