What is Automotive Urea Solution?

[RafaelRose]

Automotive urea refers to an aqueous urea solution with a urea concentration of 32.5% and a solvent of ultra-pure water. The raw materials are specialized automotive urea materials and ultra-pure water. Main principle of automotive urea: Urea undergoes hydrolysis in the aqueous solution at temperatures between 70-75°C. At temperatures below 30°C, urea crystallizes back out of the solution. Each cycle of hydrolysis and crystallization significantly improves its purity. Generally, industrial-grade urea only needs to undergo one hydrolysis-crystallization cycle to meet automotive urea standards, with a yield ratio of 1.5:1. Introduction to automotive urea: For heavy-duty trucks, buses, and other diesel vehicles to meet the China IV emission standards, an appropriate Selective Catalytic Reduction (SCR) system must be used for exhaust treatment. This system requires the use of urea solution to treat nitrogen oxides in the exhaust. Therefore, automotive urea solution has become an essential product for heavy-duty trucks and buses to comply with the China IV emission standards.