3548. ---------------. [VAN ITTERBEEK, A., AND VAN DINGENEN, W.] [Formation of Methane in Connection With the Activated Adsorption of Hydrogen and Carbon Monoxide by Nickel and by Copper.] Physica, vol. 8, 1941, pp. 810-824; Chem. Abs., vol. 36, 1942, p. 6062.
CH4 forms when H2 and CO are adsorbed on Ni. Cu acts in the same way when activated by a trace of Th. It was found that Ni shows 2 temperatures, 165° and 300°, at which the ratio of H2:CO adsorbed is 3:1, correct ratio for CH4 formation and, also 2 temperatures, 125° and 370°, at which the ratio is 2:1, correct ratio for benzene formation. At these exact temperatures, the reaction rate showed sharp maxima. The reaction product at 200°-300° was found to be nearly pure CH4, but, at 165° and 400°, heavier products also occurred, which contained benzene. The same type of behavior was found for Cu; the best temperature range for CH4 formation is 250°-525°.
VAN LOON, W. See abs. 677.