383.     ------.  [BRÜCKNER, H.]  [Formation of Methane From Carbon Monoxide-Hydrogen Mixtures in Contact With Low-Temperature Coke at Increased Pressures.]  Brennestoff-Chem., vol. 20, 1939, pp. 346-348; Chem. Abs., vol. 34, 1940, p. 7582.

      Conversion of H₂ into CH₄ in presence of low-temperature coke (5 gm. of coke, 1 liter of H₂, standard conditions per hr., 50 atm.) rose from 7% at 500° to 23% at 700°.  Correspondingly lower values were obtained at lower pressures.  CH₄ was also formed when a water gas was similarly treated; the reaction in this case, however, was principally 2CO+2H₂=CH₄+CO₂.  The maximum yield of CH₄, 40% in the outlet gas, was obtained at 40 atm. and 700°; the yield fell with rising pressures.

      --------------.  See abs. 408.