598.    ---------------.[COKE AND SMOKELESS-FREE AGE.]  Carbonization Research.  Chemical Development.  Vol. 5, 1943, pp. 151-153, 157.

     Comments on an address by J. T. King before the Midland Association of Gas Engineers.  The chemical development of coal utilization is likely to be based on the Fischer-Tropsch process.  Gases containing CO and H₂, preferably in the ratio of 1:2, are purified from S to less than 0.1 grain per 100 cu. ft., and passed over a Co catalyst at temperatures between 175°-220° C. either at normal pressure or at 5-10 atm.  Approximately 120 gm. of liquid product has been obtained per m.³ gas treated at atmospheric pressure or 150 gm. at 10 atm.  Yields are as follows, in percent by weight:

                                                                                                                                Medium                             Normal                                                                   pressure                            pressure

CH₄.... ....................... 18.......................              11

C₃+C₄ hydrocarbons... 11...................                    7

Oil below 200° C. ...... 43...................                   21

200°-320° C............... 20.......................              28

Wax.... .....................     8.......................               33