AN APPARATUS FOR THE REDUCTION OF NOx IN A LEAN NOx CONTAINING GASEOUS STREAM.

摘要

An apparatus for the reduction of NOX in a lean, NOX- containing gaseous stream comprises : an inlet conduit dimensioned and configured for connection in flow communication to a source of a lean gaseous stream containing NOX; a catalysed NOX trap member having a trap inlet and a trap outlet, the trap inlet being connected in flow communication to the inlet conduit, the trap member comprising an intimate combination of a catalyst material effective for promoting the oxidation of hydrocarbons in the gaseous stream and a NOX sorbent material;a lean NOX catalyst member having a catalyst inlet and a catalyst outlet a connector conduit connecting the trap outlet to the catalyst inletin flow communication; combustible component inlet means connected in flow communication to the inlet conduit and control means associated with the combustible component inlet means to permit intermittent injection of a combustible component into the inlet conduit.