Organic nitrates as ignition enhancers
AssigneeShell Oil Company
InventorsWidyai Prenish BANSIE, Matthias Eggenstein, Renate Uitz, Andrew David Horton
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Abstract
A diesel fuel composition comprising an organic nitrate is described. The organic nitrate may be a terpene nitrate. Methods of using an organic nitrate for achieving a desired cetane number, and uses of organic nitrates for the purpose of reducing the ignition delay of the fuel and/or for increasing its cetane number to a defined level are also described, as are methods of operating a compression ignition engine.
Claims18
A diesel fuel composition for use in a compression ignition engine, said diesel fuel composition comprises an organic nitrate selected from the group consisting of:
- a cyclic nitrate of Formula (4):
- and Formula (4A):
- wherein each of R1 to R9 is independently selected from H or C1-C6 alkyl, or nitrate(—ONO2), wherein optionally one of R4 and R5 forms an optionally substituted alkylene bridge with one of R8 and R9, which may be substituted by one or more C1-C6 alkyl, and/or nitrate(—ONO2);
- wherein at least one of R1 to R9 is not H, and provided that no more than one R2 to R9 comprises a nitrate group.
A method for reducing the ignition delay and/or increasing the cetane number of a diesel fuel composition, said method comprises adding to the composition an amount of an organic nitrate, wherein the organic nitrate is selected from the group consisting of:
- a cyclic nitrate of Formula (4):
- and Formula (4A):
- wherein each of R1 to R9 is independently selected from H or C1-C6 alkyl, or nitrate(—ONO2), wherein optionally one of R4 and R5 forms an optionally substituted alkylene bridge with one of R8 and R9, which may be substituted by one or more C1-C6 alkyl, and/or nitrate(—ONO2);
- wherein at least one of R1 to R9 is not H, and provided that no more than one R2 to R9 comprises a nitrate group.
Dependencies are inferred from the claim text.