1404. HERBST, M. [Temperature Resistance of a New Hexagonal iron Carbide in Catalysts for the Hydrocarbon Synthesis According to F. Fischer.] FIAT Reel R-19, 1942, frames 7,136-7,147, P. B. 73,594; TOM Reel 300.

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Literature Abstracts

1404. HERBST, M. [Temperature Resistance of a New Hexagonal Iron Carbide in Catalysts for the Hydrocarbon Synthesis According to F. Fischer.] FIAT Reel R-19, 1942, frames 7,136-7,147, P. B. 73,594; TOM Reel 300.

Tests described in the report concern a new hexagonal Fe carbide (Fe₂C) discovered in 1938 and found in the Fe catalysts used for Fischer gasoline synthesis. The X-ray examination showed that the new Fe carbide is an essential constituent for the activity of the Fischer catalysts. In the temperature range 290°-330°, the new Fe carbide is converted into the Fe₂C described by Hägg. This conversion temperature is considerably higher when the Fe catalysts contain Cu. It was determined that with a Cu content of 2% the conversion temperature is about 350°-400° and with 7.4% of Cu, 430°-450°. It may be seen that cuprous Fe catalysts in the Fischer synthesis are less sensitive to temperature, and that a catalyst with 7% Cu tolerates a temperature 100° higher than catalyst free of Cu. Includes 2 tables.