Aliphatic additives for soot reduction

Abstract

The invention relates to a jet fuel composition for reducing particulate emission in the exhaust from jet engines. The composition includes an aliphatic additive having a boiling point ranging from about 230° C. to about 310° C.

1 . A jet fuel composition for producing an exhaust having reduced particulate matter, comprising:
 a jet fuel; and   an additive comprising an aliphatic hydrocarbon compound having at least 10 carbon atoms;   wherein the aliphatic hydrocarbon additive has a boiling point of between about 215 and 310° C.   
     
     
         2 . The jet fuel composition of  claim 1  wherein the jet fuel is present in an amount of at least 65% by weight and the additive is present in an amount between about 5 and 35% by weight. 
     
     
         3 . The jet fuel composition of  claim 1  wherein the jet fuel is present in an amount of between about 80 and 90% by weight and the additive is present in an amount of between about 10 and 20% by weight. 
     
     
         4 . The jet fuel composition of  claim 1  wherein the jet fuel is present in an amount of between about 20 and 35% by weight and the additive is present in an amount of between about 65 and 80% by weight. 
     
     
         5 . The jet fuel composition of  claim 1  wherein the additive is selected from dodecane, cyclododecane, tridecane, tetradecane and pentadecane. 
     
     
         6 . The jet fuel composition of  claim 1  wherein the additive comprises an aliphatic hydrocarbon having between about 12 and 15 carbon atoms. 
     
     
         7 . The jet fuel composition of  claim 1  wherein the jet fuel is selected from the group consisting of Jet A, Jet A-1, Jet B, JP-4, JP-5, and JP-8. 
     
     
         8 . The jet fuel composition of  claim 1  wherein the aliphatic additive is a straight chain hydrocarbon 
     
     
         9 . The jet fuel composition of  claim 1  wherein the aliphatic additive is a cyclic hydrocarbon. 
     
     
         10 . The jet fuel composition of  claim 1  wherein the aliphatic additive is a mixture of branched and straight chain hydrocarbons. 
     
     
         11 . A method for reducing particulate matter in an exhaust from a jet engine, comprising:
 combusting a jet fuel in a jet engine;   wherein said jet fuel comprises an additive for reducing the amount of particulate matter present in said exhaust, said additive comprising an aliphatic hydrocarbon having at least 10 carbon additives and a boiling point of between about 230 and 310° C.   
     
     
         12 . The method of  claim 11  wherein the soot reduction additive is present in an amount of up to about 35% by weight. 
     
     
         13 . The method of  claim 11  wherein the soot reduction additive is present in an amount of between about 10 and 25% by weight. 
     
     
         14 . The method of  claim 11  wherein the soot reduction additive is present in an amount of between about 15 and 30% by weight. 
     
     
         15 . The method of  claim 11  wherein the soot reduction additive is selected from the group consisting of dodecane, cyclododecane, tridecane, tetradecane and pentadecane.