2023.     ---------------.  [KÜSTER, H.]  [Reduction of Carbon Dioxide to Higher Hydrocarbons at Atmospheric Pressures by Catalysts of the Iron Group.]  Brennstoff-Chem., vol. 17, 1936, pp. 221-228; Ges. Abhandl. Kenntnis Kohle, vol. 12, 1937, pp. 277-292; Chem. Abs., vol. 31, 1937, p. 1581.

        Conversion with CO₂-H₂ mixtures has been effected at 200°-300° in one stage.  Hydrocarbons formed are similar to those obtained in the benzine synthesis with CO and H₂.  The intermediate formation of CO is indicated in the reaction mechanism.  The reducing, hydrogenating, and polymerizing effects of the catalyst are influenced by impregnation of the unreduced catalyst with K₂CO₃.  Results obtained by various single, double, and triple combinations of Co, Fe, Cu, Ni, Al, and Th are compared.  Conversion and products are shown graphically for 20° intervals.