2034621 As an important part of the selective catalytic reduction system, the urea injector reduces nitrogen oxide emissions from diesel engines by accurately injecting urea solution. Its environmental impact is mainly reflected in the following aspects:
1. NOx emission reduction
Taking a heavy-duty diesel truck as an example, driving 100,000 kilometers per year, using the SCR system can reduce NOx emissions by about 5 tons.
2. Carbon footprint of urea production and transportation
The main raw material of urea is natural gas, and its production process will release CO₂.Taking Europe as an example, AdBlue transportation generates about 500,000 tons of CO₂ every year.
3. Urea leakage and by-product pollution
According to U.S. EPA statistics, about 1%-2% of AdBlue leaks during use. By-product pollution: If the SCR system does not react completely, urea may decompose into ammonia and escape, which combines with sulfates in the air to form PM2.5, which in turn aggravates air pollution. The European Union emission standards require that the NH₃ escape amount should not exceed 10ppm, but some old vehicles may exceed the standard.
4. Environmental load of syringe manufacturing and disposal
Their production requires the consumption of metal minerals, petroleum, and energy.If the electronic components in the syringe are not properly disposed of, they may release heavy metals and contaminate soil and water.