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 1749.    KHRIZMAN, I. A.  [Catalytic Decomposition of Ammonia.]  Acta Physicochim, U.R.S.S., vol. 4, 1936, pp. 899-910; Chem. Abs., vol. 30, 1936, p. 7987.

       Kinetics of the decomposition of NH₃ on promoted Fe catalysts of the Fe-Al₂O₃-K₂O type were investigated over the temperature range 300°-450°.  Two values for the energy of activation were found, 12.4 kcal. per mol. for temperature 300°-350°, and 39.7 kcal. per mol. above 350°.  The 2 values were explained on theoretical grounds by assuming several surface reactions with different reaction rates.  13 refs.