715.    ---------------.  [DOLCH, P.]  [Influence of the Reactivity of Cokes on the Behavior of Carbon Dioxide-Hydrogen Mixtures at 600°-1,200°.]  Brennstoff-Chem., vol. 14, 1933, pp. 261-263; British Chem. Abs., 1933, B, p. 772; Chem. Abs., vol. 27, 1933, p. 5173.

     Both bituminous coke and wood charcoal accelerate the reaction CO₂+H₂→CO+H₂O.  Equilibrium was not reached during passage of a 3:7 mixture over the coke even at 970°; above this temperature interaction of the coke with the gases began, but even at 1,100° there were still appreciable quantities of steam in the efflux gases; below 820° with 34:66 mixtures with coke or charcoal, respectively, solid C does not enter into the reaction.  Equilibrium in the gaseous reaction was reached over the charcoal at 750°; above 820° the gases reacted with it, and at about 1,000° only CO and H₂ were produced.