Process and system for eliminating nitrogen oxides out of exhaust gases, using a heat exchanger
An apparatus for the elimination of nitrogen oxides (NOx) present in exhaust gases from an IC engine (1), incorporated in the exhaust line (2) from the engine, comprises a device for the conversion of NOx and a heat exchanger (4) situated in a shunt circuit (5) placed up-stream of the convertor (3),...
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Main Authors | , |
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Format | Patent |
Language | English French German |
Published |
23.12.1998
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Abstract | An apparatus for the elimination of nitrogen oxides (NOx) present in exhaust gases from an IC engine (1), incorporated in the exhaust line (2) from the engine, comprises a device for the conversion of NOx and a heat exchanger (4) situated in a shunt circuit (5) placed up-stream of the convertor (3), for cooling the exhaust gases. The convertor comprises several catalysts (3) arranged in the main exhaust line (2). The catalysts have disconnected temperature ranges over which the conversion of NOx is lower than a determined threshold (Cmin). A valve (6) is situated at the opening of the shunt line (5) to distribute the gas flow between the shunt line (5) and the main line (2) so that the exhaust gases pass over the catalysts at a temperature where at least one of the catalysts is active. Also claimed is a process for the elimination of the oxides. |
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AbstractList | An apparatus for the elimination of nitrogen oxides (NOx) present in exhaust gases from an IC engine (1), incorporated in the exhaust line (2) from the engine, comprises a device for the conversion of NOx and a heat exchanger (4) situated in a shunt circuit (5) placed up-stream of the convertor (3), for cooling the exhaust gases. The convertor comprises several catalysts (3) arranged in the main exhaust line (2). The catalysts have disconnected temperature ranges over which the conversion of NOx is lower than a determined threshold (Cmin). A valve (6) is situated at the opening of the shunt line (5) to distribute the gas flow between the shunt line (5) and the main line (2) so that the exhaust gases pass over the catalysts at a temperature where at least one of the catalysts is active. Also claimed is a process for the elimination of the oxides. |
Author | BOUCHEZ, MATTHIAS MARTIN, BRIGITTE |
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DocumentTitleAlternate | Verfahren und Einrichtung zum Entfernen von Stickstoffoxiden aus Abgasen mittels eines Wärmetauschers Procédé et ensemble d'élimination des oxydes d'azote présents dans des gaz d'échappement, utilisant un echangeur thermique |
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Snippet | An apparatus for the elimination of nitrogen oxides (NOx) present in exhaust gases from an IC engine (1), incorporated in the exhaust line (2) from the engine,... |
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SubjectTerms | 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 STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS |
Title | Process and system for eliminating nitrogen oxides out of exhaust gases, using a heat exchanger |
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