What’s wrong with adding urea to the car?What is the function of adding urea to the car

Since most of the vehicles we drive in our country are gasoline vehicles, and diesel vehicles basically appear in the form of large trucks and trucks, most people know very little about diesel vehicles, let alone car urea. So, what is the role of car urea? Is car urea harmful to the human body?

What is the role of car urea?

Vehicle urea can catalytically reduce nitrogen oxides (NOx) in exhaust gas into harmless nitrogen (N2) and water (H₂O) in the selective catalytic reduction (SCR) system of diesel vehicle exhaust.

Working process of vehicle urea in SCR system

SCR is a closed-loop injection system. When exhaust gas is discharged from the engine combustion chamber, the electric pumpYuanAccording to the instruction, suck a sufficient amount of urea solution from the urea tank, mix and atomize the urea solution with compressed air, and enter the spray pipe to spray the urea nozzle evenly into the exhaust gas. At this time, the urea solution rapidly decomposes NH₃ at high temperature, and at the same time undergoes a catalytic reduction reaction with NOx, and finally generates harmless N2 and H₂O for discharge.

Is car urea harmful to the human body?

Urea for vehicles is composed of 32.5% high-purity urea and 67.5% deionized water.

Under normal circumstances, car urea is harmless to the human body (after contacting the skin, it only needs to be washed with a lot of soapy water or clean water, but remember not to enter the eyes or swallow), but if the car urea is in high temperature conditions Ammonia gas (NH₃) may be released. However, NH₃ will have corrosive and irritating effects on the human skin tissues it comes into contact with. If you are exposed to ammonia for a long time, symptoms such as skin pigmentation or skin ulcers may occur. (Once this happens, you should seek medical attention immediately, so as not to cause more serious consequences.)