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 1902.    ---------------.  [MURATA, Y., NAKAGAWA, M., TASHIRO, E., AND UNEMURA, T.]  Synthesis of Benzine From Carbon Monoxide and Hydrogen.  LXVI. Reduction of Iron Catalysts.  Jour. Soc. Chem. Ind. (Japan), vol. 46, 1943, pp. 52-68; Chem. Abs., vol. 43, 1949, p. 2401.

        Effect on the activity of the catalyst of reducing with various gas mixtures was studied in detail.  The activity of the catalyst is increased when it is reduced by H₂ to which a small amount of CO is added.  The effect of adding CO is nearly linear up to CO:H₂ = 1:2 and diminishes gradually when more CO is added.  When the ratio of CO:H₂ exceeds that of the gas mixture used in the synthesis, the activity of catalysts is greatly reduced.  When the catalyst is reduced with a gas mixture rich in H₂ and used in the synthesis with gas of composition CO:H₂ = 1:2, the durability of the catalyst is greatly increased.  Dilution of H₂ with N₂ shows no advantage, and the reduction with mixtures of CO and N₂ is unfavorable.