1190.    GHOSH, J. C., CHAKRAVARTY, K. M., AND BAKSHI, J. B.  [Catalytic Formation of Methane From Carbon Dioxide and Hydrogen : Simultaneous Acceleration of the Water Gas and Armstrong-Hilditch Reactions.]  Ztschr. Elektrochem., vol. 37, 1931, pp. 775-779; Chem. Abs., vol. 26, 1932, p. 648.

       Catalysts I, II and III were prepared respectively by impregnating pumice with nitrate solutions, drying in air at 110°, then heating for 16 hr. at 300° in pure H₂.  The weights of catalyst used were 0.6440, 0.7100, 0.6565 gm., the densities after reduction 0.4155, 0.4438, 0.4646, % Ni 8.882, 8.433, 8.030, % Ce --, 0.0687, 0.1308, % Th ---, 4.978, 9.479, and % pumice 91.11, 86.52, 82.37, respectively for I, II, and III.  The reaction tube was maintained at 405° and the catalyst at 471°.  Equal volumes of H₂ and CO, saturated with water vapor, were admitted at constant velocity.  With catalyst I, reactions (1) CO+H₂=C+H₂O and (2) CO₂+2H₂=C+2H₂O did not take part because no free C was deposited in disagreement with Randall and Gerhard (see abs. 2769).  Catalyst I lost its CH₄-forming properties with use but was still capable of promoting the water-gas reaction.  Catalysts II and III showed no loss of CH₄-forming properties.  After 180 l. had passed, II gave 32.02% CO₂, 9.65% CO, 25.58% CH₄, 22.52% H₂, 10.23% H₂O from 44.48% CO, 44.48% H₂, and 11.03% H₂O.  II gave after 190 l., 36.19% CO₂ 5.43% CO, 30.12% CH₄, 17.38%.  H₂, 10.78% H₂O from 44.78% CO, 44.78% H₂ and 10.46% H₂O.