A method and apparatus for catalytically processing a gas stream passing therethrough to reduce the presence of NO.sub.x therein, wherein the apparatus includes a first catalyst composed of a silver containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, and a second catalyst composed of a copper containing zeolite located downstream from the first catalyst, wherein the second catalyst is adapted for catalytically processing the gas stream at a lower second temperature range relative to the first temperature range.
STATEMENT OF GOVERNMENT INTEREST
This invention was made with Government support under DOE Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. Accordingly, the Government may have certain rights to this invention.