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 1839.    KODAMA, S.  Catalytic Reduction of Carbon Monoxide Under Ordinary Pressure.  I.  Studies by the Heating-Curve Method of the Catalytic Activity of a Few Metals.  Bull. Inst. Phys. Chem. Research (Tokyo), vol. 8, 1929, pp. 277-283; abstract sec. 2, 1929, pp. 35-36; Jour. Soc. Chem. Ind. (Japan), vol. 32, suppl., 1929, pp. 4, 6, 23; Sci. Papers Inst. Phys. Chem. Research (Tokyo), vol. 12, 1930, pp. 193-204; Chem. Abs., vol. 23, 1929, p. 3844; vol. 24, 1930, p. 2663.

       Ni, Co and Fe are reduced at various temperatures, and their catalytic activity in the reduction of CO by H₂ under atmospheric pressure is measured.  The mixture of 1 mol. H₂+1 mol. CO is passed through 2 tubes, 1 with, and 1 without catalyst and heated progressively to 400°.  A differential thermocouple records the exothermic reaction.  After the reaction, the Ni dissolved in the HCl without leaving any residue, while Co left a residue of C.  The activity of Ni is thus independent of the temperature of reduction, while the opposite is true with Co.  In the absence of H₂, both Ni and Co catalyze the decomposition of CO.  Fe reduced at 350° and 450° shows an exothermic reaction around 300° which is caused principally by the oxidation of Fe.  The Fe catalyst is then no longer active, and is found to be a mixture of FeO and C.  Furthermore, the heating curve with CO alone is virtually identical with that of CO+H₂.