3613.     WATANABE, T.  Poisoning Effect of Certain Substances on the Iron Catalyzer in the Decomposition of Carbon Monoxide.  Bull. Inst. Phys. Chem. Research (Tokyo), vol. 7, 1928, pp. 1078-1087 (abs. I, 102-103); Chem. Abs., vol. 23, 1929, p. 1560.

        CO from formic acid is decomposed in an Fe pipe on Fe gauze, and the gas is analyzed.  The effects of H2O, N2, H2, CH4, C2H2, C6H6, C10H8, H2S and C4H4S on the catalysis are investigated.  N2, CH4, C6H6 and C2H2 have no effect, except that C2H2 liberates C.  H2O gives some CO2, H2, and CH4.  H2 gives CH4.  Naphthalene causes a progressive drop in the catalysis efficiency, but the fall is temporary; by passing pure CO over the poisoned catalyst, the initial efficiency is recovered.  S compounds kill the catalyst.