Unleaded fuel compositions
View Patent ↗Unleaded fuel compositions is provided which comprise: 15 to 20 volume % of one or more alkanols having from 2 to 4 carbon atoms; 20 to 75 volume % of one or more branched paraffins having from 5 to 10 carbon atoms; 0 to 25 volume % of one or more linear or branched olefins; 0 to 35 volume % of one or more mono-alkylated benzenes, The unleaded fuel composition increase engine efficiency or the brake specific fuel consumption of an engine when used.
1. An unleaded fuel composition comprising:
15 to 25 volume % of one or more alkanol having from 2 to 4 carbon atoms;
20 to 75 volume % of one or more branched paraffin having from 5 to 10 carbon atoms;
0 to 25 volume % of one or more linear or branched olefin;
0 to 35 volume % of one or more alkylated benzene;
wherein the unleaded fuel composition is a synthetic fuel composition.
2. The unleaded fuel composition of claim 1 comprising 20 volume % of ethanol.
3. The unleaded fuel composition of claim 1 comprising in the range of from 20 to 55 volume % of one or more branched paraffin.
4. The unleaded fuel composition of claim 2 comprising in the range of from 20 to 55 volume % of one or more branched paraffin.
5. The unleaded fuel composition of claim 1 wherein the unleaded fuel has a RON of 103 or more.
6. The unleaded fuel composition of claim 1 comprising in the range of from 10 to 20 volume % of one or more branched olefin.
7. The unleaded fuel composition of claim 2 comprising in the range of from 10 to 20 volume % of one or more branched olefin.
8. The unleaded fuel composition of claim 1 comprising in the range of from 5 to 35 volume % of one or more mono-alkylated benzene.
9. The unleaded fuel composition of claim 2 comprising in the range of from 5 to 35 volume % of one or more mono-alkylated benzene.
10. The unleaded fuel composition of claim 3 comprising in the range of from 5 to 35 volume % of one or more mono-alkylated benzene.
11. The unleaded fuel composition of claim 6 comprising in the range of from 5 to 35 volume % of one or more mono-alkylated benzene.
12. The unleaded fuel composition of claim 8 wherein the mono-alkylated benzenes is toluene.
13. The unleaded fuel composition of claim 1 further comprising one or more fuel additive.
14. The unleaded fuel composition of claim 1 comprising:
about 20 volume % ethanol
about 10 volume % toluene; and
about 70 volume % branched paraffins,
based on the total volume of the fuel composition excluding any fuel additives present.
15. An unleaded fuel composition of claim 1 comprising:
about 20 volume % ethanol
about 10 volume % toluene;
about 53 volume % branched paraffins; and
about 17 volume % olefins,
based on the total volume of the fuel composition excluding any fuel additives present.
16. An unleaded fuel composition of claim 1 comprising:
about 20 volume % ethanol
about 34 volume % toluene;
about 29 volume % branched paraffins;
about 17 volume % olefins,
based on the total volume of the fuel composition excluding any fuel additives present.
17. The unleaded fuel composition of claim 1 wherein the olefins are selected from the group consisting of di-isobutylene, 2-methyl-2-butene, and mixtures thereof.
18. A method for increasing engine efficiency, the method comprising burning the unleaded fuel composition of claim 1 in an engine.
19. A method for reducing the brake specific fuel consumption of an engine, the method comprising burning the unleaded fuel composition of claim 1 in an engine.