System and method for reducing nitrogen oxides emissions

• Main Authors: DELUGA GREGG ANTHONY, VITSE FREDERIC, PALMATIER ALISON LIANA, HANCU DAN, WINKLER BENJAMIN
• Format: Patent
• Language: Chinese; English
• Published: 02.09.2009
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WEAPONS

A method of removing at least nitrogen oxides from an exhaust gas comprises producing reducing agents including at least hydrogen gas upstream of a conversion catalyst; diverting a portion of the exhaust gas to a location upstream of the conversion catalyst; reacting the reducing agents with nitrogen oxides present in the portion of the exhaust gas to produce a nitrogen-containing compound reducing agent using the conversion catalyst; introducing the nitrogen-containing compound reducing agent upstream of a SCR catalyst; mixing the nitrogen-containing compound reducing agent with a second portion of the exhaust gas upstream of the SCR catalyst; and reacting the nitrogen-containing compound reducing agent with nitrogen oxides present in the second portion of the exhaust gas at the SCR catalyst.