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Literature Abstracts

1534.    IIZIMA, S.  [Sorption of Hydrogen by Reduced Nickel.  I.  Quantities of Hydrogen Adsorbed by, and Diffused in, Pure and Contaminated Reduced Nickel, Isothermal Adsorption Lines and Heat of Adsorption.]  Sci. Papers Inst. Phys. Chem. Research (Tokyo), vol. 22, 1933, pp. 285-300.  Chem. Abs., vol. 28, 1934, p. 2589.

       Adsorption of H2 by reduced Ni is due to both adsorption and diffusion.  Quantitative distinction is drawn between the amount of H2 absorbed and the amount diffused.  Isotherms showing the quantities of H2 absorbed under low pressures agree with the Freundlich equation.  Heats of adsorption are calculated by means of the Clapeyron equation, and an average of 16,350 cal. per mol. is obtained.  Reduced Ni that was brought into contact with air before the adsorption studies showed lower adsorptive capacity for H2.  The heat of adsorption in one such case was 6,479 cal. per mol.