3325.     TATIEVSKAYA, E. P.  [Effect of Water Vapor on the Rate of Reduction of Magnetite and Hematite by Carbon Monoxide.]  Jour. Phys. Chem. (U.S.S.R.), vol. 14, 1940, pp. 349-356; Chem. Abs., vol. 36, 1942, p. 3760.

        2.5-20% of H2O vapor added to CO strongly retards the reduction of Fe3O4 at 900, and especially at 500; the retardation is more pronounced if the Fe3O4 was already partly reduced.  Reduction of Fe2O3 is not affected by H2O at 500 or 900 unless Fe2O3 is already partly reduced.  H2O has no specific effect, it gives CO2 and H2 with CO on Fe oxide catalysts, and its apparent action is due to CO2.  CO2 does not retard the reduction of Fe2O3 to Fe3O4.  The inhibition of the reduction of Fe3O4 can be accounted for by considering the competition between CO and CO2 for the magnetite surface.

        ----------.  See abs. 567, 568.