Diesel Exhaust Fluid (DEF) is a non-toxic solution composed of purified water and urea. Its primary function is to reduce the amount of nitrogen oxides (NOx) emitted from diesel engines into the atmosphere. This reduction is achieved through a process called Selective Catalytic Reduction (SCR), a technology integrated into the exhaust systems of many modern diesel vehicles and equipment. The fluid is injected into the hot exhaust stream, where it triggers a chemical reaction within the SCR catalyst, converting NOx into harmless nitrogen and water.
The implementation of DEF and SCR technology is crucial for meeting stringent emissions standards set by regulatory bodies worldwide. These standards aim to minimize the environmental impact of diesel-powered vehicles by lowering their contribution to air pollution and smog formation. Consequently, the use of the fluid contributes to improved air quality and public health. Initially mandated for on-road heavy-duty vehicles, the application of DEF is now expanding to include a wider range of diesel engines in industries such as agriculture, construction, and power generation.
