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1535. ---------------. [IIZIMA, S.] [Sorption of Hydrogen by Reduced Nickel. II. At Low Temperatures.] Sci. Papers Inst. Phys. Chem. Research (Tokyo), vol. 23, 1933, pp. 34-43. Chem. Abs., vol. 28, 1934, p. 2589.
Adsorption of H2 under low pressures by reduced Ni was measured at 100°, 19°, 0°, -45.2°, -78.5°, -112° and –183.5°. The results of Nikitin, see abs. 2469, at 19° were not confirmed. Ni and H2 did not form a compound at 19°. Isobars all showed maxima 0°-20°, and minima were found between –80° and –180°. The lower the equilibrium adsorption pressure the lower the temperature of the minimum. Irregularities in the isothermal at –183° are accounted for on the basis of local heating of the adsorbent due to adsorption of large quantities of H2. The isothermal is smooth when H2 is admitted slowly.