3462.     TROPSCH, H., AND VON PHILLIPPOVICH, A.  [Comparative Experiments on the Decomposition of Carbon Monoxide by Contact Substances.]  Ges. Abhandl. Kenntnis Kohle, vol. 7, 1925, pp. 44-45; Chem. Zentralb., 1926, I, p. 3298; Chem. Abs., vol. 21, 1927, p. 3530.

        Purified and dried CO was conducted over contact substances at 400.  Its decomposition according to the reaction:  2CO→CO2+C, was measured by determining the CO2.  Ni was the most active catalyst, but this activity was almost completely destroyed by alloying the Ni with 50% Sn.  Great differences were found among different types of Fe.  With a CO current of 400 cc. per hr., the following % CO2 were found in that issuing gas:  with Ni, 36.4; Fe from Fe2O3, 10.4, ferr. reduct., 2.3; ZnO, 0.9; MnO, 0.8; Cr2O3, 0.6; NiSn, 0.3-0.6; Al2O3, 0.4; BaSO4, 0.4; tinned Fe, 0.4; MgO, 0.2; Cu, 0.0.