By injecting AdBlue® into the SCR catalytic converter, all harmful nitrogen oxides( NOx) are instantly transformed into innoxious nitrogen and water.

It is important to have always a sufficient amount of AdBlue® in the tank of a car.

Otherwise, if a  vehicle using a SCR-system is being operated without AdBlue®, the SCR-equipment has a high risk of being damaged.
AdBlue® is a very pure solution, biodegradable, that is not damaging the environment, non-toxic and easy to handle liquid.

At -11° AdBlue® freezes and at 70°C decomposes into ammonia. Above 30° AdBlue® starts to decompose.
Keeping the solution in proper conditions (not exposed under the direct sunlight) will ensure you the quality of the product.

AdBlue® reduces the fuel consumption up to 5%.

By using a high quality, certified AdBlue® you can have additional advantages as the fuel consumption reduction with almost 5%.

This process has 2 stages: the particles elimination and reduction of nitrogen oxides

1.The particles elimination

The first step of treating the exhaust gases is particles elimination.
In order to clean the combustion pollutants from the diesel engines exhaust they are used additional systems of treating the exhausting gases.

The first step is the oxidation catalytic convertor. Here, the pollutants are transformed into harmless exhaust gases components.
The second step consists on soot cleaning from the exhaust gases by the gas particles filter. The cleaning is produced by burning the incorporated particles and it can be done if the temperature of the particles filter is at least 350°C.
In order to actively burn the filter, the engine command unit increases the exhausting temperature at 600°C. An immediate consequence is a short raise of fuel consumption and, thus, the raise with 9% of CO2 emissions.
In a new car, the particles filter has an efficiency of almost 100%, so the gas does not contain any trace of soot.

II.Reduction of nitrogen oxides

In order to reduce the nitrogen oxides emissions (NOx), in this stage can be used two technologies that can act in a cumulated manner: the NOx stocking catalytic convertor and the SCR catalytic convertor(Selective Catalytic Reduction).
The NOx stocking catalytic convertor aim is to eliminate the nitrogen oxides from the exhausting gases and their stocking until it reaches its exploitation capacity.

The stocked nitrogen oxides are transformed into carbon dioxide( CO2) and nitrogen(N2) , which are neutral substances. After this process, the NOx catalytic convertor starts again its functioning.
The stocking catalytic convertor can stock nitrogen oxides only at temperatures between 150 și 500°C. Thus, the start at cold is very important, the engine could’nt yet reach the necessary temperature. This thing is quite opposite with the normal functioning, when the engine reaches the maximum efficiency from around 80% at the functioning temperature of 300-400°C. The vehicle increased consumption for the reconstitution of nitrogen oxides deposit is around 2%.

Within the SCR( Selective Catalytic Reduction) catalytic convertor, the nitrogen oxides emissions are transformed by adding the AdBlue® sprayed into the exhausting flux into the neutral components of nitrogen(N2), water and carbon dioxide(CO2).
Only at temperatures higher than 200°C are recorded significant transformation rates of nitrogen oxides.
When the engine and the exhausting system are situated at the functioning temperature, the SCR catalytic convertor removes up to 90% from the nitrogen oxides emissions from the exhausting gases.

Its high efficiency level makes possible the burning adjustment for a reduced consumption and, thus, lower carbon dioxide emissions. This means that a fuel economy of up to 5% it is possible.

(Informations from the 2016 annual report of German Auto Industry VDA).