901.    ---------------.  [FESTER, G., AND BRUDE, G.]  [Reactions of Carbon Monoxide.]  Brennstoff-Chem., vol. 5, 1924, pp. 49-53; Chem. Abs., vol. 18, 1924, p. 2480.

     During various attempts to reduce CO by H₂ catalytically, it has been observed that at low temperatures appreciable amounts of CO₂ are formed.  A study is made of the formation of CO₂ from CO-H₂ mixtures and CO alone at temperatures 35°-240° with Pd precipitated on active C and on silica gel as catalysts.  2 reactions were considered:  2CO=CO₂+C and CO+H₂O=CO₂+H₂.  Both were found to take place to a limited extent.  Concentrations of 1 to 55% CO₂ in exit gases were obtained, the higher results being obtained at 240°, corresponding to 71% of the pure CO used.  With CO:H₂ mixtures 1:1 the H₂ appeared to have no reducing action, presumably because of strong preferential adsorption of CO by active C and silica gel.  Moist CO gave higher concentrations of CO₂, indicating that CO+H₂O→CO₂+H₂ took place.  Preferential oxidation of CO in mixtures of H₂, O₂, and small amounts of CO with V₂O₅ as catalyst was tried without success, although with equal concentrations of CO and H₂, 2 ½ times as much CO as H₂ was oxidized.

      FETTERLY, L. C.  See abs. 2441, 2442.

      FIELD, J. H.  See abs. 647, 648.