Its origin and status: Due to the environmental protection departments of various countries proposed to further reduce the emission of diesel emissions of nitrogen oxides pollutants.
Domestic commonly known as Euro IV standard.
Engine manufacturers have begun to use SCR technology (selective catalytic Reduction technology selective catalytic reduction technology) to meet environmental sector requirements.
Diesel Exhaust Treatment liquid (commonly known as: Automotive urea, car urea, automotive environmental urea), SCR technology must be used in consumables. The SCR system consists of a urea tank (loaded with diesel exhaust liquid) and an SCR catalytic reaction tank.
The operating process of the SCR system is: when nitrogen oxides are found in the exhaust pipe, the urea tank automatically sprays out the diesel exhaust treatment liquid, the diesel exhaust treatment liquid and nitrogen oxides in the SCR catalytic reaction tank, the oxidation reduction reaction, the generation of non-polluting nitrogen and steam discharge. If the diesel exhaust treatment liquid is not loaded, or the purity is not enough, or the quality is inferior, the vehicle engine will automatically decelerate.
At the same time, the quality of shoddy diesel engine exhaust treatment will contaminate the catalysts in the SCR catalytic reaction tank, resulting in serious consequences. In fact, in Europe, 2006 has already begun to implement this policy. European Diesel Exhaust treatment fluid is called AdBlue.
The main representative is BP and so on. In the United States, beginning in 2010, with the implementation of the EPA2010 standard, but also comprehensively increased the implementation of the application of the product, in the United States, diesel exhaust treatment fluid called DEF (Diesel exhaust Fluid).
The main representative has BLUEDEF and so on.
At present, this product has two major international certifications, one is the German Automobile Industry Association (VDA) AdBlue certification, the other is the American Petroleum Institute (API) def certification. At home, the production of diesel exhaust liquid is still a new industry, it is expected in the second half of 2011 or the first half of 2012 will be developed in China's own diesel exhaust liquid products national standards.