What Is Def Made Out Of?

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DEF, or Diesel Exhaust Fluid, is a crucial component in reducing harmful nitrogen oxide emissions from diesel engines. As environmental regulations become increasingly stringent, DEF has become more prevalent in the transportation industry. But what exactly is DEF made out of? In this article, we will delve into the composition of DEF and how it works to reduce emissions.

The Components of DEF

DEF is made up of two main components: urea and deionized water. Urea is a nitrogen-rich chemical compound that is derived from natural gas or petroleum. It is commonly used in fertilizers and animal feed. Deionized water is water that has been purified of all minerals and ions, making it ideal for use in DEF.

The urea used in DEF is typically of high purity, with a minimum concentration of 32.5%. This is important because impurities in the urea can cause buildup in the engine and reduce the effectiveness of the DEF. The deionized water used in DEF is also of high purity, with a minimum conductivity of 1 microsiemens per centimeter.

How DEF Works

DEF works by breaking down harmful nitrogen oxide (NOx) emissions into harmless nitrogen and water vapor. When the diesel engine runs, it produces NOx as a byproduct of the combustion process. The DEF is injected into the exhaust system, where it reacts with the NOx in a catalytic converter. This reaction converts the NOx into nitrogen and water vapor, which are released harmlessly into the atmosphere.

The amount of DEF required depends on the size of the engine and the amount of emissions it produces. Generally, a diesel engine will use about 2-3% of its fuel consumption in DEF. It is important to note that if the DEF runs out, the engine will not operate properly and may even enter into a reduced power mode.

Conclusion

In conclusion, DEF is made out of urea and deionized water. The high purity of these components is crucial in ensuring the effectiveness of the DEF in reducing harmful emissions. DEF works by breaking down NOx emissions into harmless nitrogen and water vapor, which are released into the atmosphere. As environmental regulations become more stringent, DEF will continue to play a vital role in reducing emissions from diesel engines.