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 1344.    HAMAI, S., HAYASHI, S., AND SHIMAMURA, K.  Physicochemical Investigation of Catalytic Mechanisms.  III.  Desorption of Various Gases From the Catalyst Used in the Fischer-Tropsch Synthesis.  Jour. Soc. Chem. Ind. Japan, vol. 45, 1942, pp. 313-318; Chem. Abs., vol. 43, 1949, p. 2401.

        To study the mechanism of catalysis in the synthesis of hydrocarbons from CO and H₂, a Co catalyst with certain promoters was heated 190°-200° and saturated with H₂, CO, or N₂.  Another 1 of the 3 gases was then passed over the catalyst, and the velocity of desorption of the original gas was measured by analysis of the exhaust gas.  H₂ was more quickly desorbed than CO.  A comparison of the desorption of CO by H₂ and of H₂ by CO indicates that CH₄ formation predominates when there is an excess of H₂.  The mechanism of the Fischer-Tropsch reaction is proposed to be Co_nCO→Co_nCHOH→Co_nCH₂