Adblue Pumps & DEF Accessories

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AdBlue and Diesel Exhaust Fluids Pumping & Accessories Diesel Exhaust Fluids (DEF) such as AdBlue and AUS 32 are urea based fuel additives aimed at reducing nitrous oxide emissions from diesel engines. Such additives have been gaining in popularity in Australia as emissions standards tighten particularly in the trucking and heavy machinery industries. The AdBlue is not added to the fuel tank like other additives but has its own AdBlue tank on selective catalytic reduction (SCR) equipped vehicles. The AdBlue is injected into the exhaust gas stream where it acts to reduce vehicle emissions. As a rule of thumb the consumption of AdBlue is 4-6% of total diesel fuel consumption. AdBlue schematic for a Cummins Diesel Engine AdBlue or diesel exhaust fluids come under standard ISO22241 which governs the constituents, mix and quality. The primary ingredient is urea, chemically (NH2)2CO, and is present as 32.5% of the final solution. However, the Adblue standard allows for 31.8 to 33.2% urea mix. The remainder is deionized water with very limited trace elements. This mix is chosen as a ~30% urea mix gives a low crystalisation point of -11oC How does AdBlue reduce NOx emissions? AdBlue is introduced to the exhaust gases within the exhaust system for SCR vehicles. Due to the high temperatures the ~68% water is turned into steam and discharged along with the exhaust gases. The urea is thermally degraded to form ammonia and isocyanic acid via the follow chemical formula: Urea (NH2)2CO + Heat = Ammonia (NH3) + Isocyanic acid (HNCO) The isocyanic acid undergoes further chemical reduction to Ammonia and water as per the following chemical equation: Isocyanic acid (HNCO) + Water (H2O) = Carbon dioxide (CO2) + Ammonia (NH3) These reduction reactions ultimately provide ammonia to the hot exhaust gas stream where it can act to reduce NOx emissions. Ammonia reacts with the NOx and oxygen to form Nitrogen gas (N2) and water. Using the example of Nitrogen monoxide or Nitric Oxide (NO)