3269.     STEINBRECHER, -----.  [Influence of Synthesis Gas and Its Impurities Upon the Efficiency and Life of the Catalysts in Gasoline Synthesis.]  FIAT Reel K-25, frames 3,782-3,796, Jan. 5, 1938; PB 70,216; TOM Reel 292.

        Research report on the influence of synthesis gas and its impurities on the efficiency and life of the catalysts in gasoline synthesis of Braunkohle-Benzin A.-G. plant, Ruhland.  The life of the catalysts (Co-kieselguhr) is shorter if synthetic gas, purified by regular routine of plant operation, is applied than if ideal gas (33.3% CO+66.7% H₂) is applied.  This is caused by impurities like inert gas, O₂, S-compounds, resins, and resin-forming products.  By adding inert gases, the speed of reaction is decreased rapidly.  Adding O₂ of more than 0.6% has a strong influence in decreasing the output, S-compounds affect the Co catalyst.  The presence of over 0.2 gm. per 100 N m.³ causes disturbances.  It appears that thiophene and other S-compounds substituted in the nucleus cause the strongest reactions, followed by mercaptan and finally CS₂ and COS.  Tests to establish results on resin-forming substances were not successful.  Further tests were conducted on reducing the contact period of the gas with the catalyst by increased gas flow with lower height of layer.  The absolute yield was increased thereby.