2024.     ---------------.  [KÜSTER, H.]  [Reduction of Carbon Dioxide to Methane Upon Iron Catalysts at Ordinary Pressures.]  Brennstoff-Chem., vol. 17, 1936, pp. 203-206; Ges. Abhandl. Kenntnis Kohle, vol. 12, 1937, pp. 270-277; Chem. Abs., vol. 30, 1936, p. 7790.

        Contrary to Sabatier, pure Fe at temperatures above 300° permitted conversion of CO₂ to CO and CH₄, the last in very small yield.  Addition of small amounts of Al or Mn did not affect activity of the Fe.  Cu and Co are practical activators.  The hydrogenating characteristics of Ni appear evident even with 5%.  With Co added, higher gases and liquid hydrocarbons are formed.  12 refs.

        ----------.  See abs. 987, 1831, 2621.

        KVALNES, H. M.  See abs. 150.