3030a.     ---------------.  [SASTRI, M. V. C., AND SRIKANT, H.]  Mixed Adsorption of Hydrogen and Nitrogen at Elevated Pressures on a Promoted-Iron Synthetic-Ammonio Catalyst.  Current Sci., vol. 20, 1951, pp. 15-16; Chem. Abs., vol. 45, 1951, p. 10018.

        An Fe-K₂O-Al₂O₃-TiO₂ catalyst was used.  The individual adsorption of H₂ and N₂ from a 3:1 mixture were determined on the same catalyst at 50°-350° and at a total gas pressure up to 50 atm.  Adsorption of H₂ from the mixture increased regularly with its partial pressure at all the temperatures studied, whereas that of N₂ exhibited this regularity only at the highest temperature.  In practically every case the adsorption of H₂ at a given partial pressure from the mixture was considerably higher than that from the pure gas at an equivalent pressure.  Similarly, except at 203° and 300°, N₂ adsorption was increased in the presence of H₂.  At 350° when the partial pressure of N₂ exceeded 7 atm., the ratio of the respective increments of N₂ and H₂ adsorption varied successively from 1 N:1 H, through 1 N:2 H, to finally 1 N:3 H.  These observations suggested the successive formation of -NH-, -NH₂, and NH₃ complexes on the active surface of the catalyst.

        SASTRY, S. L.  See abs. 1185.

        SATO, K.  See abs. 12.