What is the composition of diesel vehicle urea?
1 Answers
Automotive urea refers to a urea aqueous solution with a urea concentration of 32.5% and a solvent of ultra-pure water. The raw materials are specialized automotive urea and ultra-pure water. Automotive urea is an essential product for heavy-duty diesel vehicles to meet the National IV emission standards. Below is relevant information about automotive urea: 1. Introduction: To achieve the National IV emission standards, heavy-duty trucks, buses, and other diesel vehicles must use an appropriate SCR system for exhaust treatment. This system requires the use of a 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 meet the National IV emission standards. 2. Usage instructions: Automotive urea must use Grade 1 ultra-pure water from the electronics industry. Since the SCR catalyst carrier is highly susceptible to metal ion poisoning, which can deactivate the catalyst, the urea solution must use Grade 1 ultra-pure water from the electronics industry. The automotive urea solution begins to freeze at -11°C and completely solidifies at -20°C in practical use. Current technology involves adding modifiers to lower the solution's freezing point and external heating devices to prevent solidification.