A method to reduce NO.sub.x, emissions from diesel fuel alcohol microemulsions (E-diesel) is taught. Ethanol is stripped from the microemulsion and entered into the exhaust gasses upstream of the reducing catalyst. The method allows diesel engines to meet new, lower emission standards without having to carry separate fuel and reductant tanks.
UT-BATTELLE, LLC (One Bethel Valley Road 4500N, MS-6258 Oak Ridge TN 37831-6258)
July 27, 2007
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
 This invention was made with United States Government support under Contract No. DE-AC05-00OR 22725 between the United States Department of Energy and UT-Battelle, LLC, and the United States Government has certain rights in this invention.