Development of Ag/Al₂O₃ Catalysts for the Reduction of Lean NOx

Abstract

Silver supported alumina (Ag/Al₂O₃) catalysts have been developed for removing lean NOx with ethanol. Fundamental aspects of NOx reduction with etha-nol over the Ag/Al₂O₃ catalyst were summarized. In addition, the results of the bench scale test on the Ag/Al₂O₃-ethanol system using real lean-burning gas engine and diesel engine exhaust gas were reported. On the basis of these findings, development of catalyst system (Ag/Al₂O₃+Oxidation catalysts) for the reduction of NOx from the sta-tionary diesel engines was discussed.