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.

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.