A method to use diesel fuel alchohol micro emulsions (E-diesel) to provide a source of reductant to lower NO.sub.x emissions using selective catalytic reduction. Ethanol is stripped from the micro emulsion and entered into the exhaust gasses upstream of the reducing catalyst. The method allows diesel (and other lean-burn) engines to meet new, lower emission standards without having to carry separate fuel and reductant tanks.
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.