3026.     SARTORI, G.  [Adsorption of Hydrogen, Carbon Monoxide, and Carbon Dioxide on Zinc Oxide at the Temperature of Synthesis of Methyl Alcohol.]  Gazz. chim. ital., vol. 67, 1937, pp. 98-104; Chem. Zentralb., 1937, II, p. 944; Chem. Abs., vol. 31, 1937, p. 6077.

        Adsorption of H₂ and CO on ZnO is greater at 430° than at 0°-120°.  This fact is attributable in part to an activated adsorption and in part to diffusion within the catalyst.  CO₂ is adsorbed to a smaller extent at 430° than at room temperature, because at 430° chemical sorption is no longer possible and because diffusion is less than for the lighter gases.  Mathematical assumptions made in analyzing the phenomena were verified by the fact that the experimental results could be recalculated in a satisfactory manner with the formulas derived from them.  A further confirmation per haps is to be found in the fact that the velocity constants of adsorption are related in the same way as are the dipolar moments and diffusion constants, that is, inversely to the square roots of the molecular weights of the individual gases.  The conclusions that may be drawn from these facts with respect to the catalytic synthesis of MeOH and comparisons of various catalysts will be published in a forthcoming paper.