1043.    FISCHER, F., TROPSCH, H., AND DILTHEY, P.  [Reduction of Carbon Monoxide to Methane in the Presence of Various Metals.]  Brennstoff-Chem., vol. 6, 1925, pp. 265-271; Ges. Abhandl. Kenntnis Kohle, vol. 8, 1929, pp. 175-190; Jour. Chem. Soc., 1925, II, p. 982; Chem. Abs., vol. 19, 1925, p. 3367.

       Various metals reduced at low temperature from the oxides where possible.  (Co, Fe, Mo, W, Ru, Pd, Os, Ir, Pt, Ag, Cu, Rh), were tested with and without admixture of Al₂O₃ at various temperatures, 100°-800°, for conversion of CO and H₂ mixtures to CH₄.  Ru gave the best results, that is, 34.4% CH₄ in exit gas at 300° with a mixture CO₂:H₂=1:5 at 12 cc. gas flow per min.  The use of Al₂O₃ as a carrier of metals proved advantageous particularly in the case of Fe.  The order of the catalytic activity of the metals tested was Ru, Ir, Rh, Ni, Co, Os, Pt, Fe, Mo, Pd, Ag.