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A catalyst arrangement (8) in a flue gas line (2) for reducing nitrogen oxides in the presence of oxygen involves the problem of further reducing the fraction of unreduced nitrogen oxides which remain in the flue gas. For this purpose, an excess of ammonia is injected and this ammonia-enriched flue...

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Bibliographische Detailangaben
Hauptverfasser:	BALLING, LOTHAR, SPITZNAGEL, GUENTHER
Format:	Patent
Sprache:	dan
Schlagworte:	BLASTING COMBUSTION APPARATUS COMBUSTION PROCESSES FLUES HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES SEPARATION TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A catalyst arrangement (8) in a flue gas line (2) for reducing nitrogen oxides in the presence of oxygen involves the problem of further reducing the fraction of unreduced nitrogen oxides which remain in the flue gas. For this purpose, an excess of ammonia is injected and this ammonia-enriched flue gas stream is first passed over a known reduction catalyst (12) and then over an oxidation catalyst (13) for oxidising the remaining ammonia excess. The catalyst arrangement according to the invention is especially suitable for use in an industrial combustion installation.