823. ---------------.[EMMETT, P. H., AND BRUNAUER, S.] Adsorption of Nitrogen by Iron-Synthetic-Ammonia Catalysts. Jour. Am. Chem. Soc., vol. 56, 1934, pp. 35-41; Chem. Abs., vol. 28, 1934, p. 1243.

823. ---------------. [EMMETT, P. H., AND BRUNAUER, S.] Adsorption of Nitrogen by Iron-Synthetic-Ammonia Catalysts. Jour. Am. Chem. Soc., vol. 56, 1934, pp. 35-41; Chem. Abs., vol. 28, 1934, p. 1243.

Rates of adsorption of N₂ by promoted and by pure Fe catalysts were measured over the temperature range 273°-450°. The energy of activation of the adsorption process is about 16,000 cal. Isotherms at 400° and 450° indicate a heat of adsorption of about 35,000 cal. Isotherms taken at –189° are linear with respect to pressure 100-760 mm.