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AdBlue? Diesel Exhaust Fluid ? What are they?
Dec 25, 2017

WHAT IS ADBLUE?

The latest techniques used to clean up diesel emissions is known as selective catalytic reduction (SCR). A solution of urea in water is used to treat exhaust gases and remove harmful pollutants, including nitrogen oxides (NOx), of which nitrogen dioxide (NO2) is the most harmful.

The fluid used in most vehicles is known as AdBlue, a registered trademark owned by the German Association of the Automobile Industry (VDA), which ensures standards are maintained. The fluid is stored in a tank in the car, but unlike petrol or diesel it is not injected into the engine; instead it is fed into part of the vehicle’s exhaust. A chemical reaction converts the harmful NOx exhaust gases into harmless nitrogen and water. The AdBlue also has other name like Diesel Exhaust Fluid, AUS 32 or ARLA 32.

WHAT CARS USE ADBLUE?

New technology such as SCR and AdBlue is still found mainly in large, expensive diesel models. That is because the system is both too large and too expensive to squeeze into small runabouts.

In tests, small diesel cars without SCR, such as the 2016 Volkswagen Polo 1.4 TDI, have been found to be as toxic as a fully laden lorry. In measurements taken by Leeds University’s Institute of Transport Studies, the Polo emitted 1.2g of NO2 per kilometre travelled, which is the same as a fully laden diesel lorry with a 13-litre engine.


WHY CARS NEED ADBLUE?


With the increasing requirements for environmental protection, the government impose pressures on vehicle emissions. Euro 6 emission standard has been universally known. AdBlue in SCR system can convert NOX into environmental substances, greatly reducing pollutans in air.


December, 12, 2017

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