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Reduction of nitrogen oxides emissions from diesel engines

  • US 5,404,841 A
  • Filed: 08/30/1993
  • Issued: 04/11/1995
  • Est. Priority Date: 08/30/1993
  • Status: Expired due to Term
First Claim
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1. A process for reducing nitrogen oxides emissions from a diesel engine comprising forming an emulsion of an aqueous urea solution in diesel fuel which comprises about 15% to about 45% urea solution by weight, wherein said emulsion further comprises a catalyst which comprises a composition or complex of cerium, platinum or a platinum group metal, copper, iron, or manganese and further wherein at least about 70% of the water droplets in the emulsion have a particle size below about 5 microns Sauter mean diameter, and supplying said emulsion to a diesel engine to be combusted therein, whereby combustion of the emulsion leads to reduction in the nitrogen oxides emissions from the diesel engine when compared with combustion of the diesel fuel alone.

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