10kg of automotive urea solution is 9.17 liters, with a density of 1.09. Automotive urea is an essential product for heavy-duty diesel vehicles to meet the National IV emission standards. Introduction to automotive urea: Suitable for diesel engines in cars, trucks, and buses that comply with the National IV emission standards. Automotive urea is a consumable that must be used in the SCR operating system. Vehicle urea is a transparent liquid with a concentration between 31.8%-33.2%, mainly composed of 32.5% high-purity urea and 67.5% double-distilled water. Automotive urea is primarily derived from the purification of industrial urea. Its main principle is: At temperatures between 70-75°C, urea hydrolyzes in an aqueous solution; At temperatures below 30°C, urea recrystallizes from the aqueous solution; Each cycle of hydrolysis and crystallization significantly improves its purity. Generally, hydrolyzing and crystallizing industrial-grade urea once can meet the standards for automotive urea, with a yield ratio of 1.5:1. Vehicle urea works in conjunction with the SCR system (Selective Catalytic Reduction technology). When a diesel engine exhausts combustion gases from the combustion chamber, the controller receives a command, prompting the urea pump to extract urea liquid from the urea tank. The urea is then sprayed through a nozzle into the exhaust pipe, where it uniformly mixes with the exhaust gases. Finally, it passes through the SCR-specific catalytic reaction filter, which filters and removes key diesel engine pollutants such as NOx and particulate matter.
