Diesel exhaust fluid (DEF) is a solution made up of 32.5% high-purity urea and 67.5% deionized water. It is a non-toxic, colorless, and odorless liquid that is used in diesel engines equipped with selective catalytic reduction (SCR) technology. When DEF is injected into the exhaust stream of a diesel engine, it reacts with the nitrogen oxide (NOx) emissions and converts them into harmless nitrogen and water vapor.
Urea is an organic compound that is commonly used in fertilizers and animal feed. It is also used in the production of plastics, resins, and adhesives. In the context of DEF, urea is used as a reducing agent to break down NOx emissions in diesel engines. The use of DEF in diesel engines has become increasingly common in recent years due to tightening emissions regulations and the need for cleaner and more efficient engines.
One of the main advantages of using DEF in diesel engines is that it can significantly reduce NOx emissions. NOx emissions are a major contributor to air pollution and can have negative health effects on humans and the environment. By using DEF, diesel engines can reduce their NOx emissions by up to 90%, making them much cleaner and more environmentally friendly.
Another advantage of using DEF is that it can improve the fuel efficiency of diesel engines. This is because the SCR system that uses DEF can optimize the combustion process and reduce the amount of fuel needed to produce the same amount of power. This can result in significant cost savings for operators of diesel-powered vehicles and equipment.
In conclusion, diesel exhaust fluid (DEF) is a solution made up of urea and deionized water that is used in diesel engines equipped with SCR technology. It is an effective way to reduce NOx emissions and improve the fuel efficiency of diesel engines, making them more environmentally friendly and cost-effective.