Principle Urea Injection

The reaction is based on the following equations:

Installation & Project

The SCR process benefits are:

•NOx is reduced to harmless nitrogen and water vapour eliminating problems resulting from the generation of wastewater or solution;
•The catalyst has a long life to provide a high NOX removal rate;
•Extensive modifications to the engines are avoided.

The underlying principle of the SCR process is the use of ‘active’ catalytic sites on which the reactant species are adsorbed. The adsorption enables the combination of the reactant species at much lower gas temperatures than is required for uncatalysed reactions.