Composition for reducing polynuclear aromatic hydrocarbon emissions

A diesel fuel composition comprising a base diesel and between from about 0.1 to about 55 percent by volume of a renewable hydrocarbon distillate, the renewable hydrocarbon distillate comprising one or more hydrocarbons having from 5 to 9 double bond equivalents, wherein the amount of the hydrocarbons having from 5 to 9 double bond equivalents in the renewable hydrocarbon distillate is between from about 10 to about 50 volume percent.

A process for reducing exhaust emissions of one or more polynuclear aromatic hydrocarbons from a diesel engine which comprises introducing into the engine a diesel fuel composition having from about 0.1 to about 55 percent by volume of a renewable hydrocarbon distillate boiling from about 320° F. to about 700° F., wherein the renewable hydrocarbon distillate comprises one or more hydrocarbons having from 5 to 9 double bond equivalents, and further wherein the amount of the one or more hydrocarbons in the diesel fuel composition having from 5 to 9 double bond equivalents is between from about 10 to about 50 volume percent.

In a method of reducing emissions of polynuclear aromatic hydrocarbons from a diesel engine by introducing into the engine a diesel fuel composition, the diesel fuel composition comprising a base diesel fuel, the improvement being the addition to the base diesel fuel of between from about 0.1 to about 55 percent by volume of a renewable hydrocarbon distillate fraction with boiling range from about 320° F. to about 700° F., wherein the renewable hydrocarbon distillate comprises one or more hydrocarbons having from 5 to 9 double bond equivalents and further wherein the amount of one or more hydrocarbons having from 5 to 9 double bond equivalents in the fuel composition is between from about 10 to about 50 volume percent.