2805.     REMBASHEVSKIĬ, A. G.  [Enriching of Binary Gas Mixtures.]  Trudy Leningrad. Khim. Teknol. Inst., No. 6, 1938, pp. 288-312; Khim. Referat. Zhur., vol. 1, No. 8-9, 1938, pp. 3-4; Chem. Abs., vol. 33, 1939, p. 9593.

        Artificially prepared mixtures of CO and H₂ were passed through a layer of the catalyst [Ni obtained from Ni(NO₃)₂] at 200°, 240°, 280°, and 320°.  For CO:H₂=1:3, the reaction CO+3H₂=CH₄+H₂O reaches its maximum at 280° (92.8% CH₄, 8% H₂).  the 1:1 and 1:2 mixtures yield less CH₄, and C is deposited from the side reaction 2CO=CO₂+C.  No advantages were obtained from the substitution of Co for Ni.  The maximum CH₄ formation took place at a higher temperature.  The use of Fe-Zn, and of a specially prepared Fe catalyst gave unsatisfactory results.  To obtain the CO:H₂=1:3 binary gas mixture, half of the gas, free from H₂S and from CO₂, was passed at 450°-500° through a converter, Fe oxide with the oxides of Cr, Mg and other metals as catalysts.  The CO is oxidized by water vapor according to CO+H₂O=CO₂+H₂+10,000 kcal.  After removing the CO₂, both gases are mixed, dried, and passed over the catalyst.  Experiment with binary peat gases gave a product with a 4,500 kcal. heat capacity, and an 80.43% yield.  Analogous results were obtained from the 1:1 mixtures, but the 1:3 mixture reaction was faster, and it took place at a lower temperature.  The best catalyst was Ni-Al₂O₃ (stable to contact contamination).  Prepared water gas was passed through the catalyst at 250°-280° with an increasing velocity until the heat capacity of the final product was below 4,000 kcal./m.³.  The reaction yield increased with the velocity and decreased with the increase of the heat capacity of the final product.  A temperature increase, in the 250°-280° region, for the same heat capacity of the final product caused a decrease of the yield and an increase of the velocity.  It was calculated that a 100,000 m.³/hr. enriching of the gases to 3,000, 3,600, 4,500, and 5,800 kcal./m.³ is commercially profitable only if the products are used close to the production plant.

        REMEIKA, J. P.  See abs. 1136.