Vehicle urea is a heavy-duty diesel vehicles to achieve the four countries, five emission standards of essential products. Automotive urea refers to urea concentration of 32.5% and the solvent is ultra-pure water urea solution, raw materials for automotive urea-specific raw materials and ultra-pure water.
Heavy trucks, buses and other diesel vehicles to achieve the fourth and fifth emission standards, the exhaust gas treatment will have to choose a suitable SCR system, and the system must use urea solution to exhaust nitrogen oxides for treatment. Therefore, automotive urea solution has become an essential product for heavy trucks and buses to meet the emission standards of the fourth country.
SCR is the best choice for China's emission reduction. Currently the current domestic diesel GB19147-2009 diesel GB standard requirements ≤ 350ppm, while the ECR-DOC technology requires less than 10ppm sulfur content of the oil, so in China temporarily do not have the promotion conditions. SCR can withstand 350ppm of sulfur-containing oil, so there is a promotion of the technical basis. Due to the fuel economy of the fourth-generation engine using SCR technology is better than EGR technology, the engine has small changes, less requirements on fuel and oil, and has advantages in the continuity of technology upgrades. The SCR catalyst has good durability and no catalyst blockage Of the risk, so SCR technology is the most suitable for China's national heavy-duty diesel emission reduction technology line.
Automotive urea is a concentration of 32.5% and the solvent is ultra-pure water urea solution, the production of raw materials for automotive urea raw materials and ultrapure water, the key point is the purity of raw materials. From the production process point of view, although automotive urea on raw material purity requirements higher than the general industrial needs, but the current domestic technology already can meet the practical application needs. Automotive urea production process is not enough to build high barriers to entry.
