Fuel composition
AssigneeShell USA, Inc.
InventorsRichard John Price, Caroline Nicola Orlebar, Marcello Stefano Rigutto, Richard Hugh Clark, Jasprit Kaur Chahal
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Abstract
A liquid fuel composition for a spark ignition internal combustion engine comprising (a) gasoline blending components, (b) Fischer-Tropsch derived naphtha at a level of up to 50% v/v and (c) oxygenated hydrocarbon at a level less than 50% v/v. While the low octane number of Fischer-Tropsch derived naphtha would normally severely restrict its blendability in gasoline to low levels, it has now been found that Fischer-Tropsch derived naphtha can be included in, for example, ethanol-containing gasoline fuel compositions, in surprisingly and significantly high blend ratios of Fischer-Tropsch derived naphtha to ethanol.
Claims14
A liquid fuel composition for a spark ignition internal combustion engine, the liquid fuel composition comprising:
- (a) a concentration of 3% to 25% by volume of the liquid fuel composition of a Fischer-Tropsch derived naphtha
- comprising a mixture of hydrocarbons having between 5 and 12 carbon atoms, a RON from 27 to 32, and a MON from 27 to 32;
- (b) a concentration of 5% to 25% by volume of the liquid fuel composition of an oxygenated hydrocarbon;
- and
- (c) a gasoline base fuel,
- wherein the liquid fuel composition has
- a density from 720 kg/m3 to 775 kg/m3,
- a RON from 85 to 105, and
- a MON from 75 to 90.
A liquid fuel composition for a spark ignition internal combustion engine, the liquid fuel composition comprising:
- (a) a concentration of at least 10% by volume of the liquid fuel composition of a Fischer-Tropsch derived naphtha;
- (b) a concentration of 5% to 25% by volume of the liquid fuel composition of an oxygenated hydrocarbon;
- and
- (c) a gasoline base fuel,
- wherein the liquid fuel composition has
- a density from 720 kg/m3 to 775 kg/m3, and a RON of 96 or less.
Dependencies are inferred from the claim text.