3417.     TOTZEK, F. Communication to the Power Commission, June 12, 1942.  TOM Reel 238; Bureau of Mines transl. T-489, 1950, 20 pp.

        Report on the complete gasification of powdered coal by the Koppers-Totzek process operating under fluidized conditions with the help of O₂ and steam.  Experiments are described using both powdered lignite and bituminous coal for the production of synthesis gas.  The results were particularly favorable.  Using lignite, a gas of the following composition was obtained:  CO₂, 14; CO, 35; H₂, 50; N₂, 1%; CO+H₂ concentration 85%.  Gas yield was 1.9 m.³ per kg. of raw coal corresponding to an ideal gas yield of 1.62 N m.³  O₂ consumption per kg. of coal was 1,304 N m.³ corresponding to 0.16 N m.³ per N m.³ synthesis gas or 0.188 N m.³ per N m.³ ideal gas.  The computed production cost of the synthesis gas was 1.32 pfg. per N m.³  With bituminous coal, the gas had the composition:  CO₂, 11; CO, 54; H₂, 34; N₂, 1%, CO+H₂ concentration 88%.  Gas yield was 2.1 N m.³ per kg. coal, corresponding to an ideal gas yield of 1.85 N m.³  O₂ consumption amounted to 0.525 N m.³, corresponding to 0.25 N m.³ per N m.³ of synthesis gas or 0.284 N m.³ per N m.³ ideal gas.  The cost was 1.72 pfg. per N m.³ synthesis gas.  Similar calculations are made for the production of fuel gas from lignite char, lignite, and bituminous coal but without the use of O₂.