EXHAUST EMISSION CONTROL DEVICE AND EXHAUST EMISSION CONTROL METHOD FOR EXTERNAL COMBUSTION ENGINE, AND NOX ELIMINATING CATALYST

• Main Authors: KANAE MASAHITO, SATO DAIKI, NAGAYAMA TOSHIAKI
• Format: Patent
• Language: English
• Published: 25.08.2011
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide an exhaust emission control device and an exhaust emission control method for an external combustion engine using CO for eliminating NOx from exhaust gas in an oxygen-exceeding atmosphere with high eliminating performance, and to provide a method for using a NOx, CO eliminating catalyst. SOLUTION: In an exhaust gas flow path of the external combustion engine which emits exhaust gas containing CO and Nox and having an atmosphere in which oxygen exceeds a stoichiometric amount, the exhaust emission control device for the external combustion engine is arranged which has the Nox, CO eliminating catalyst using CO as a reducing agent for reducing a nitrogen oxide (NOx) to be eliminated from the exhaust gas. The NOx, CO eliminating catalyst has a porous carrier and a catalytically active component supported on the porous carrier. The catalytically active component containing Ir and the porous carrier containing an S-component can impart a NOx, CO eliminating function thereto. COPYRIGHT: (C)2011,JPO&INPIT