Self-lubricating diesel fuel and method of making and using same
First Claim
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1. A self-lubricating diesel fuel composition comprising primarily paraffins, the composition comprising:
- a quantity of one or more normal paraffins;
a sulfur content of about 200 ppm or less;
a flashpoint of greater than 140°
F.; and
,an aromatic content of from about 0.5% to less than about 9% by weight of the self-lubricating diesel fuel composition;
wherein the quantity of one or more normal paraffins is (a) sufficient to produce a cetane number of 40 or more but (b) less than about 99% by weight of the self-lubricating diesel fuel composition;
wherein the self-lubricating diesel fuel composition exhibits a coefficient of friction of less than 0.3 when tested using a high frequency reciprocating test rig at 60°
C.
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Abstract
A diesel fuel comprising a mixture of normal paraffins and branched paraffins. The normal paraffins present in the diesel fuel is less than about 99% by weight; and the aromatic content in the diesel fuel is less than about 10% by weight. The diesel fuel has a cetane number of at least 40 and a sulfur content of less than about 100 ppm. Optionally, the diesel fuel may further include cycloparaffins, i.e., naphthenes. To increase the lubricity of the diesel fuel, a lubricity additive, such as fatty acid methyl ester, can be added to the diesel fuel.
54 Citations
33 Claims
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1. A self-lubricating diesel fuel composition comprising primarily paraffins, the composition comprising:
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a quantity of one or more normal paraffins; a sulfur content of about 200 ppm or less; a flashpoint of greater than 140°
F.; and
,an aromatic content of from about 0.5% to less than about 9% by weight of the self-lubricating diesel fuel composition; wherein the quantity of one or more normal paraffins is (a) sufficient to produce a cetane number of 40 or more but (b) less than about 99% by weight of the self-lubricating diesel fuel composition; wherein the self-lubricating diesel fuel composition exhibits a coefficient of friction of less than 0.3 when tested using a high frequency reciprocating test rig at 60°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 24, 25, 26, 30, 31)
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14. A method for protecting a fuel injector pump when operating an engine using a diesel fuel composition comprising primarily paraffins, the method comprising:
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providing a diesel fuel composition comprising a quantity of one or more normal paraffins sufficient to produce a cetane number of 40 or higher , the normal paraffin content being less than about 99% by weight of the diesel fuel composition; providing the diesel fuel composition with an aromatic content of from about 0.5% to less than about 9% by weight, thereby producing a self-lubricating diesel fuel composition having a sulfur content of about 200 ppm or less and a coefficient of friction of less than 0.3 when tested using a high frequency reciprocating test rig at 60°
C.; and
,operating the engine comprising the fuel injector pump without component failure burning the self-lubricating diesel fuel composition. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 27, 28, 29, 32, 33)
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Specification