Quality control of selective catalytic reduction reagents

摘要

The invention is directed to a method for monitoring the quality of selective catalytic reduction agents, in particular for monitoring the quality of NH 3 producing reagents, such as urea solutions. The method of the present invention allows for determining the equivalent NH 3 concentration of any selective catalytic reduction reagent that forms NH 3 upon heating. Subsequently, the amount of injected reagent can be adjusted to the measured equivalent NH 3 concentration in order to optimise the NO x reduction.