Abstract:
The invention relates to a method and an arrangmement in which a percarboxylic acid product is prepared and used. Conventional methods include refrigerated transport and double storage of the percarboxylic acid product before the consumption thereof at its site of use. These expensive stages have now been eliminated carrying out the preparation in connection with the use.
Abstract:
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.