Fuel compositions
AssigneeShell Oil Company
InventorsRalph Anthony Cherrillo, Mary Ann Dahlstrom, Edward Carl Nelson
Life of this patent
Estimating the term…
Abstract
A fuel composition having an enhanced thermal stability in a diesel fuel application is provided comprising a base fuel containing: (a) 90 to 50% by volume based on the base fuel, of a petroleum refined diesel fuel having sulfur level of less than 500 ppm, and boiling point within the range of about 150 to about 400° C.; (b) 5 to 25% by volume based on the base fuel, a Fischer-Tropsch derived gas oil; and (c) 5 to 25% by volume based on the base fuel, a fatty acid alkyl ester having C18:2 to C18:1 ratio of 1.5 to 2.8 wherein the alkyl group has a carbon number from 1 to 4.
Claims21
A fuel composition comprising a base fuel consisting essentially of:
- (a) 90 to 50% by volume based on the base fuel, of a petroleum refined diesel fuel having sulfur level of less than 500 ppm, and boiling point within the range of about 150 to about 400° C.;
- (b) 5 to 25% by volume based on the base fuel, a Fischer-Tropsch derived gas oil;
- and
- (c) 5 to 25% by volume based on the base fuel, a fatty acid alkyl ester having C18:2 to C18:1 ratio of 1.5 to 2.8 wherein the alkyl group has a carbon number from 1 to 4.
A method for improving thermal stability of a diesel fuel run or operated in a diesel engine by using a diesel fuel composition comprising a base fuel comprising:
- (a) 90 to 50% by volume based on the base fuel, of a petroleum refined diesel fuel having sulfur level of less than 500 ppm, and boiling point within the range of about 150 to about 400° C.;
- (b) 5 to 25% by volume based on the base fuel, a Fischer-Tropsch derived gas oil;
- and
- (c) 5 to 25% by volume based on the base fuel, a fatty acid alkyl ester having C18:2 to C18:1 ratio of 1.5 to 2.8 wherein the alkyl group has a carbon number from 1 to 4.
A method of preparing a diesel fuel comprising blending
- (a) 90 to 50% by volume based on the base fuel, of a petroleum refined diesel fuel having sulfur level of less than 500 ppm, and boiling point within the range of 150 to 400° C.;
- (b) 5 to 25% by volume based on the base fuel, a Fischer-Tropsch derived gas oil;
- and
- (c) 5 to 25% by volume based on the base fuel, a fatty acid alkyl ester having C18:2 to C18:1 ratio of 1.5 to 2.8 wherein the alkyl group has a carbon number from 1 to 4.
Dependencies are inferred from the claim text.