10. Products from Fischer-Tropsch Plants.
(2) FT Gasoline. In one case (Rheinpreussen) these olefins are used in the manufacture of isopropyl and isobutyl alcohols by sulphuric acid hydration. The bulk of the fraction is used as motor fuel. In many cases it is blended with benzene which is usually available from adjacent coking plants. No FT gasoline is used for aviation purposes.
The following properties are generally given:
|
For 150° C EP gasolines |
LP |
MP |
|
Olefine content |
33% |
19% |
|
Octane No. (Res.) |
57 |
38 |
|
200° C EP gasolines |
||
|
Octane No. (Res.) |
43 |
25 |
The product has a straight chain character. It was found that on the average one out of thirty carbon atoms was a tertiary.
Rhurchemie had developed processes to improve the quality of the gasoline. These include catalytic cracking, aromatization, olefine isomerization. These processes are dealt with in U.S. Naval Technical Mission, Eu. report entitled, “The Manufacture of Aviation Gasoline in Germany.”