Letter | Published:

Chromium Oxide as a Promoter in Catalysts for the Fischer-Tropsch Synthesis

Nature volume 156, page 506 (27 October 1945) | Download Citation



THE economics of synthesis of hydrocarbons by the Fischer-Tropsch process may be improved by using (1) cheaper catalytic material, (2) water gas as such in place of enriched synthesis gas (CO: H2 as 1:2) and (3) medium pressures instead of atmospheric pressures. A cheap iron-copper catalyst prepared by Ghosh and Sen1 gave 86 gm. of hydrocarbons per cubic metre of gas and has since been developed by Japanese investigators2. The fact that chromium oxide possesses very high adsorption for hydrogen at 200° has been taken advantage of in preparing a catalyst (CO = 34 per cent; Cu = 4 per cent; ThO2 = 2·3 per cent; Ce2O3 = 0·24 per cent; Cr2O3 = 4·6 per cent; rest kieselguhr) which has been found to be remarkably steady, and yields with water-gas at a pressure of 5 atmospheres and 205° C, 160 gm. of liquid hydrocarbons per cubic metre with a space velocity of 600 c.c. per hour per c.c. of catalyst.

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  1. 1.

    J. Indian Chem. Soc., 12, 53 (1935).

  2. 2.

    , et al., Sci. Papers Inst. Phys. Chem. Res., Tokyo, 35, 330 (1938–39); 38, 118 (1940); 38, 184 (1941).

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  1. Indian Institute of Science, Bangalore, India. Feb. 28, 1944.

    • J. C. GHOSH
    •  & S. L. SASTRY


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