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Diesel Exhaust Fluid Urea Solution

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SCR System of Diesel Vehicle

2019-09-09 11:54:59


AdBlue® for vehicles is developed as the regulations for heavy-duty diesel vehicles are becoming more stringent. Particulate matter (PM) and nitrogen oxides (NOX) in diesel exhaust are the two main sources of vehicle exhaust pollution. For nitrogen oxides, the main exhaust aftertreatment technologies used in Europe and America are SCR and EGR+DPF, of which Europe and Japan is dominated by SCR, and the United States has also fully turned to the SCR route after 2010. As a reducing agent for SCR systems, automotive urea solution products have been developed into an emerging industry with a complete production, supply and marketing system. Countries such as Europe, the United States and Japan have also developed complete and mature technologies and application specifications for AdBlue® .


Compared with the characteristics of SCR and EGR+DPF two kinds of exhaust gas after-treatment technology routes, considering the continuity of technology and domestic diesel quality, SCR technology is more in line with the requirements of China's diesel development. Almost all of the heavy-duty National IV diesel engines that have been approved by type in China have adopted SCR technology. The SCR exhaust gas treatment system has become an inevitable choice for China's national IV heavy-duty diesel vehicles, which will also drive the development of AdBlue®.

SCR standards for Selective Catalytic Reduction, a technology for trucks, buses and heavy vehicles for exhaust gas aftertreatment. After market testing, SCR technology is the most economical method in the NOx reduction program. The main components of the SCR technology are selective catalytic reduction technology, catalysts, injectors, liquid storage tanks and feed controllers. The urea in the catalyst reacts with water to form ammonia in the presence of heat, and the harmful nitrogen oxides in the tail gas react with ammonia gas to be converted into harmless nitrogen and water.

Schematic diagram of the assembly of the SCR system on heavy-duty vehicle:



EverBlue Chemicals is not only committed to providing customers with AdBlue® solutions, but also to provide domestic SCR system repair and maintenance services .

 
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