What raw materials are used to make vehicle urea?

[OManuel]

The raw materials for urea production are carbon dioxide and ammonia. The primary use of urea in vehicles is to reduce harmful nitrogen oxides in exhaust gases into nitrogen and water. It is generally used in diesel vehicles. Below is an introduction to the related content: Principle: The harmful substances in diesel vehicle exhaust are mainly nitrogen oxides and particulate matter. Technical measures can be employed within the engine to reduce particulate emissions, leaving nitrogen oxides as the primary component in the exhaust. By injecting urea into the exhaust after-treatment device, the urea decomposes into ammonia at high temperatures. Under the action of a catalyst, the ammonia reacts with nitrogen oxides to produce harmless nitrogen and water. This device is called the SCR (Selective Catalytic Reduction) after-treatment system. Urea Tank: Vehicles have a dedicated urea tank where urea is stored. As long as the vehicle is running, urea will be consumed, so it must be replenished in a timely manner. Typically, about 4 liters of urea are consumed per 100 liters of diesel fuel.