A METHOD FOR THE PREPARATION OF A REDUCING AGENT COMPOSITION

The invention relates to a method for preparing a reducing agent composition, which is used in the selective catalytic reduction of nitrogen oxides and which contains from 20 to 40 % by weight of urea, from 20 to 40 % by weight of ammonium formate, and water. The composition is prepared by adding ur...

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Bibliographische Detailangaben
Hauptverfasser:	NISSINEN, TIMO, PEKONEN, PENTTI, ARVOLA, JOUKO, HAETAELAE, EERO, MAEAETTAE, LAURI, HAERMAE, TIMO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING 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 FOR ADAPTATION TO CLIMATE CHANGE TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a method for preparing a reducing agent composition, which is used in the selective catalytic reduction of nitrogen oxides and which contains from 20 to 40 % by weight of urea, from 20 to 40 % by weight of ammonium formate, and water. The composition is prepared by adding urea to the aqueous solution of ammonium formate that is prepared in situ, and by preparing the said aqueous solution of ammonium formate using, as starting materials, a source of ammonium, a source of formate, and water. L'invention porte sur un procédé de préparation d'une composition d'agent réducteur, qui est utilisé dans la réduction catalytique sélective d'oxydes d'azote et qui contient de 20 à 40 % en poids d'urée, de 20 à 40 % en poids de formiate d'ammonium, et de l'eau. La composition est obtenue par addition d'urée à la solution aqueuse de formiate d'ammonium qui est préparée in situ, et par préparation de ladite solution aqueuse de formiate d'ammonium à l'aide, comme matières de départ, d'une source d'ammonium, d'une source de formiate et d'eau.