SCR engines use a diesel exhaust fluid (DEF) such as AdBlue®. The fluid is stored in a separate tank in the system and injected into the exhaust stream. This injection causes a chemical reaction in the SCR catalytic converter which turns oxides of nitrogen (NOx) into environmentally-friendly components, diatomic nitrogen (N2) and water. As a result, selective catalytic reduction systems are being used as a sustainable and effective way of protecting the environment.AdBlue® combined with an SCR-catalyst converter has proven to be the leading technology for reducing nitrogen oxide (Nox) in exhaust gasses which are created in the combustion process in diesel engines. The synergy between SCR technology and AdBlue® can help reduce NOx emissions by up to 95%. AdBlue® will help your business to reduce harmful emissions and it will reduce your fuel costs by up to seven percent. The product can be stored for 18 months, with a low freezing point of -11°C. It can be used in most weather conditions.