The introduce of the Urea

Urea solution, also known as diesel exhaust fluid (DEF), is a liquid solution used in the selective catalytic reduction (SCR) system of diesel-powered vehicles to reduce nitrogen oxide (NOx) emissions. The solution is made up of 32.5% high-purity synthetic urea and 67.5% deionized water, and is stored in a separate tank in the vehicle.

How does urea work?

When the engine runs, a small amount of the urea solution is injected into the exhaust stream before it enters the SCR system. The high temperature in the exhaust stream causes the urea to decompose into ammonia (NH3), which then reacts with NOx over a catalyst to form harmless nitrogen gas (N2) and water vapor (H2O). This process helps to significantly reduce the amount of NOx emissions from diesel-powered vehicles, and is an important tool in meeting modern emissions standards.

The ultimate function of automotive urea

The ultimate function of automotive urea is to reduce the level of nitrogen oxides (NOx) in the exhaust gas of diesel-powered vehicles. When injected into the exhaust system, urea reacts with the NOx to produce harmless nitrogen and water vapor. This process is known as selective catalytic reduction (SCR) and is an important method for meeting emissions regulations in many countrie