2705. ------. [PITTSBURGH CONSOLIDATION COAL CO.] Hydrogen. British Patent 673,333, June 4, 1952. Chem. Abs., vol. 47, 1953, p. 7744.

H₂ is produced by passing steam and CH₄ in a ratio of 2-4:1 over granular CaO in an amount equal to 2 ½ times the weight of the C in the CH₄. The reaction zone is held 1,500°-1,650° F. and 20-50 atm.; and the inlet temperature should be at least 100° F. above the outlet temperature. The CaO is regenerated by heating to 1,750°-1,800° F.

------. See abs. 827, 2760.