Fuel compositions with mono- or di- butyl succinate and method of use thereof

Abstract

Fuel compositions comprising primarily a mono- or di-butyl succinate as an oxygenation additive are described. The fuels can be diesel fuels which generate carbon based particulates in diesel engines. The result is reduced emissions of particulates from the diesel engines.

1 . A method of reducing emissions from an internal combustion engine by combusting a fuel composition containing a butyl succinate. 
   
   
       2 . A fuel composition comprising butyl succinates which function as oxygenates, extenders, and replacers. 
   
   
       3 . A composition comprising fuel and a butyl succinate. 
   
   
       4 . The composition of  claim 3 , wherein said fuel is diesel fuel. 
   
   
       5 . The composition of  claim 3 , wherein said butyl succinate is about 1-5% w/w relative to said fuel. 
   
   
       6 . The composition of  claim 3 , wherein said butyl succinate has a formula C 4 H 9 O 2 CCH 2 CH 2 CO 2 C 4 H 9 . 
   
   
       7 . The method of  claim 1 , wherein said fuel is diesel fuel. 
   
   
       8 . The method of  claim 1 , wherein said butyl succinate is dibutyl succinate. 
   
   
       9 . The method of  claim 1 , wherein -said butyl succinate has a formula C 4 H 9 O 2 CCH 2 CH 2 CO 2 C 4 H 9 . 
   
   
       10 . The method of  claim 1 , wherein said butyl succinate is about 1-5% w/w relative to said fuel. 
   
   
       11 . A composition which comprises:
 (a) a liquid hydrocarbon fuel; and   (b) between 0.1 and 30 percent by weight of mono- or di-butyl succinate ester as a primary organic oxygenation source for the fuel.   
   
   
       12 . The composition of  claim 11 , wherein the fuel is diesel fuel. 
   
   
       13 . The composition of  claim 11 , wherein the dibutyl succinate is 5 to 10 percent by weight of the fuel. 
   
   
       14 . The composition of any one of  claims 11 ,  12  or  13 , wherein the fuel is substantially free of contaminants which cause pollution. 
   
   
       15 . A method for increasing combustion of a fuel to water and carbon dioxide, and reducing particulates from the combustion, which comprises:
 a. providing a composition which comprises a liquid hydrocarbon as the fuel and between 0.1 and 30 percent by weight of dibutyl succinate ester as a primary organic oxygenation source to run the engine so as to increase the combustion and reduce the particulates from the combustion.   
   
   
       16 . The method of  claim 15 , wherein the fuel is diesel fuel. 
   
   
       17 . The method of  claim 15 , wherein the diesel fuel is 5 to 10 percent by weight of the fuel. 
   
   
       18 . The method of any one of  claims 15 ,  16  or  17 , wherein the fuel is substantially free of contaminants which cause pollution. 
   
   
       19 . The composition of any one of  claims 11 ,  12  or  13 , wherein the dibutyl succinate is the sole organic oxygenation source for the fuel. 
   
   
       20 . The method of any one of  claims 15 ,  16  or  17 , wherein the dibutyl succinate is the sole organic oxygenation source for the fuel. 
   
   
       21 . The composition of any one of  claims 15 ,  16 , or  17 , wherein the composition comprises a secondary oxygenation source.