AceBlue 32 works in conjunction with vehicle engine SCR systems to reduce nitrogen oxide (NOx) exhaust emissions. Active emissions control technology vehicles are usually identified by the use of the words ‘SCR’ or ‘Blue’ in their model names.

AceBlue 32 DEF is sprayed and mixed into exhaust gas after it passes through the diesel particulate filter and enters the SCR catalytic converter via a dosing control system. In this case, the ammonia in the urea reacts with NOx in the exhaust stream, neutralizing it to form harmless nitrogen (N2) and water vapour (H2O), while also lowering total fuel consumption by 2-6 percent.

AceBlue 32 and SCR systems are extremely effective, reducing NOx emissions by up to 90%, hydrocarbon and carbon monoxide emissions by 50% to 90%, and particulate emissions by 30% to 50%.