METHOD AND APPARATUS FOR REDUCING NOX WITH FIRST AND SECOND CATALYSIS

摘要

A method and apparatus; (10) for catalytically processing a gas stream (13) passing therethrough to reduce the presence of NO therein, wherein the apparatus includes a first catalyst (20) composed of a silver containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, and a second catalyst (22) composed of a copper containing zeolite located downsteam 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.