PROCESS FOR OBTAINING LIQUID FUEL OIL FROM CARBONACEOUS FEED STOCKS

摘要

1493400 Fischer-Tropsch synthesis RIO TINTO (RHODESIA) Ltd 6 Dec 1974 [7 Dec 1973 22 May 1974] 52949/74 Heading C5E Coal is treated to produce tar oil, coal gas and coke, a gas mixture containing hydrogen and carbon monoxide is produced from the coke and used to synthesize fuel oil, the tar oil is hydrogenated to produce fuel oil and the coal gas is treated to produce hydrogen, part of which is added to the gas mixture and the remainder of which is used to hydrogenate the tar oil. Coal is subjected to low temperature carbonization to produce tar oil 3, coal gas 4 and coke 2; the coke is treated in a water gas generator to produce water gas 7 and blow gas which is used to fire the carbonization retorts. The coal gas 4 is reformed with steam over a nickel catalyst at 550‹ C. to produce a hydrogen-carbon monoxide mixture which is subjected to shift conversion followed by scrubbing to remove carbon dioxide and leave the hydrogen stream 9. Part of the stream 9 is used to hydrogenate the tar oil and the remainder is used to increase the hydrogen/carbon monoxide ratio of the water gas prior to Fischer-Tropsch synthesis to produce the fuel oil 16. Hydrogen-carbon monoxide mixture can be added to the water gas or to the reformed gas mixture 8 through a balance connection. Fig. 2 (not shown) illustrates an embodiment in which the coal gas is treated by thermal cracking in a chamber heated by blow gas from the water gas generator to produce the hydrogen stream and a carbon black product.