Diesel Exhaust Fluid (DEF)

Diesel Exhaust Fluid (DEF)
Diesel Exhaust Fluid
A Catalyst for a Greener Future
Diesel Exhaust Fluid (DEF), or Aqueous Urea Solution (AUS32), is a 32.5% urea solution used to reduce NOx emissions in diesel engines equipped with Selective Catalytic Reduction (SCR) systems. It is injected into the exhaust system, where it decomposes into ammonia, which the SCR catalyst then converts to water. DEF helps vehicles meet emission standards and improve air quality.
QAFCO Diesel product specifications
Aspect
Colorless clear liquid
pH
at 20°C: 7.5 - 9.5
Melting
range
-11 to -12°C
Boiling range
> 100°C
Viscosity at 25°C
approx. 1.4 mPas
Density
at 20°C: 1.087 – 1.093 g/cm
Key Benefits of DEF
Environmental Impact
By minimizing NOx emissions, DEF helps improve air quality and reduces the impact of diesel vehicles on climate change.
Regulatory Compliance
DEF usage ensures compliance with stringent emission standards, making it essential for modern diesel vehicles.
Engine Protection
DEF can extend the life of diesel engines by reducing harmful deposits.
Sustainable Future
DEF is a crucial step towards a greener and more sustainable future, aligning with global efforts to reduce carbon emissions.
By embracing DEF technology, industries and individuals can contribute to a cleaner and healthier planet.
What is Diesel Exhaust Fluid?
Diesel Exhaust Fuel (DEF) is the name for an Aqueous Urea Solution of 67.5% water and 32.5% urea (AUS32). It is found in vehicles and diesel generators as part of a process known as Selective Catalyst Reduction (SCR)
How DEF can reduce harmful vehicle emissions
When injected into the exhaust system of diesel engines, DEF significantly reduces harmful nitrogen oxide (NOx) emissions. This reduction is achieved through a chemical reaction that converts NOx into harmless nitrogen and water vapour.
Urea’s popularity has increased not only because of regulations, but also due to its increased efficiency compared to exhaust gas recirculation systems. Research suggests that the catalyst reduction saves approximately 5% to 9% more fuel than a gas recirculation engine.