Low-emissions diesel fuel emulsions

Abstract

A low-emissions diesel fuel comprises fungible aviation kerosene emulsified with from 1 to 30% water, and preferably contains 50-300 ppm detergent and 25-500 ppm lubricity additive. Improved results can be achieved by also employing a fuel-soluble platinum group metal compound, such as 0.1-2.0 ppm platinum COD and a fuel-soluble cerium compound, such as 5-20 ppm cerium oleate. A method of reducing the emissions of pollutants from a diesel engine, comprising running the engine on a fuel as defined. The method is improved by also employing another pollution-reducing technique selected from timing changes, exhaust gas recirculation, oxidation catalysts, lean NO x catalysts and particulate filters for enhanced emissions control.

1 . A low-emissions diesel fuel comprising an emulsion of from 1 to 30% of an aqueous phase and 70-99% of an oil phase comprised of aviation grade kerosene, detergent and lubricity additive.  
     
     
         2 . A low-emissions diesel fuel according to  claim 1  formulated as an emulsion of water-in-oil where and contains 50-300 ppm detergent, 25-500 ppm lubricity additive.  
     
     
         3 . A low-emissions diesel fuel according to  claim 1  formulated as an emulsion of water-in-oil where and contains aviation kerosene grade 55.  
     
     
         4 . A low-emissions fuel according to  claim 1 , further comprising platinum and/or cerium fuel additives.  
     
     
         5 . A low-emissions diesel fuel according to  claim 4  comprising fuel-soluble platinum composition and fuel-soluble cerium composition.  
     
     
         6 . A low-emissions diesel fuel formulated as an emulsion of water-ill-oil where the emulsion is made by inclusion of from 1 to 30% of an aqueous phase with 70-99% of an oil phase comprising fungible aviation kerosene grade 55, 50-300 ppm detergent, 150-250 ppm lubricity additive and 0.1-1.0 ppm platinum supplied as platinum COD and 2-15 ppm cerium supplied as cerium hydroxy oleate propionate complex.  
     
     
         7 . A method of reducing the emissions of pollutants from a diesel engine, comprising running the engine on a fuel as defined in any of claims  1 - 7 .  
     
     
         8 . A method of reducing the emissions of pollutants from a diesel engine according to  claim 7  wherein the method is improved by also employing another pollution-reducing technique selected from timing changes, exhaust gas recirculation, oxidation catalysts, lean NO, catalysts and particulate filters for enhanced emissions control.  
     
     
         9 . A method of reducing the emissions of pollutants from a diesel engine, comprising running the engine on a fuel formulated as an emulsion of water-in-oil where the emulsion is made by inclusion of from 1 to 30% of an aqueous phase with 70-99% of an oil phase comprising fungible aviation kerosene grade 55, 50-300 ppm detergent, 150-250 ppm lubricity additive fuel-soluble platinum composition and fuel-soluble cerium composition, and also including also employing another pollution-reducing technique selected from timing changes, exhaust gas recirculation, oxidation catalysts, lean NO x  catalysts and particulate filters for enhanced emissions control.  
     
     
         10 . A method of reducing the emissions of pollutants from a diesel engine according to  claim 9  which contains 0.1-2.0 ppm platinum supplied as platinum COD and 2-15 ppm cerium supplied as cerium hydroxy oleate propionate complex