2754a.     PROBST, R. E., MEYERSON, S., AND SEELIG, H. S.  Adsorption and Reaction of Carbon Monoxide on Promoted-Iron Catalysts.  Jour. Am. Chem. Soc., vol. 74, 1952, pp. 2115-2116.

        In a study of the adsorption of CO on Fe catalysts, it was found that chemical reactions occur that produce Fe pentacarbonyl and CO2.  The adsorption apparatus was of conventional design and was operated at constant pressure.  The Fe catalyst was of the usual type used for the synthesis of hydrocarbons from CO and H2.  It consisted of mill scale in powdered form finer than 100 mesh. promoted with 0.5 wt. % K2O.  After reduction with H2 at 340 under 250 p.s.i., the catalyst was degassed at 450 until a pressure of 1.5X10-6 mm. was obtained.  The gas used contained 98.4 vol. % CO, 0.1 CO2, 0.7 H2, and 0.8 N2.  Four adsorption isotherms were measured at 0, 25, 65, and 108 at 280 mm. pressure.  After 144 hr. analysis was made of the gas in the adsorption cell revealing Fe pentacarbonyl and large amounts of CO2.  The results indicate that, at temperatures as low as 25, CO will react with reduced Fe to form Fe(CO)5.  The CO2 could have been produced by the Fe-catalyzed conversion of CO presumably Fe carbide, were produced by the decomposition of Fe(CO)5.