What is SCR technology for trucks, buses, non-road vehicles and cars?
"SCR" is the name of a post-combustion technology treatment for diesel vehicles, which allows them to reduce their emissions of NOx (nitrogen oxides). SCR stands for Selective Catalytic Reduction. This technology requires the use of a reagent called AdBlue. Almost all of the main engine manufacturers have decided to use this technology to meet the requirements of new legislation on NOx (Nitrogen oxides) emissions.
The main components of the SCR system are the:
- SCR catalyst
- AdBlue Fluid injection unit
- AdBlue tank
- AdBlue injection control unit.
The AdBlue is injected from the AdBlue tank into the exhaust pipe, which is in front of the SCR catalyst, but downstream of the engine. As it is heated in the exhaust, the AdBlue changes into ammonia (NH3) and carbon dioxide (CO2). When the nitrogen oxide (NOx) gases from the exhaust pipe react inside the catalyst with the ammonia, the harmful NOx molecules in the exhaust are converted into harmless nitrogen and water, which is released to the atmosphere as steam.
To make sure that your SCR system works correctly, please make sure that you only use high quality AdBlue, such as that sold under the brand name Air1 by Yara. This will protect the investment you have made in your vehicle as a low quality reagent would not be pure enough and could be contaminated with impurities. This could cause damage to your catalyst and lead to very high repair costs, that the vehicle manufacturer will not cover.
SCR will be used on new models of vehicles for Euro VI for large goods vehicles and Euro 6 for cars. This is a technology that has already proven itself and one that can be counted upon for the future.
What are the advantages of SCR technology with AdBlue?
AdBlue, combined with SCR technology, is an efficient solution to reduce emissions of NOx from diesel engines. It allows lower CO2 emissions than that of competing solutions like EGR technology. It is also the most economical solution to meet standards for NOx emissions. Major engine and vehicle manufacturers in the world now offer models equipped with SCR and, due to the Euro VI emission standard for large goods vehicles in Europe, this will only strengthen the demand for this technology.