Selective Catalytic Reduction (SCR) is a prominent technology used to reduce NOx emissions from diesel engines, which are particularly challenging to manage. This system injects a urea-based solution, commonly known as Diesel Exhaust Fluid (DEF) or AdBlue, into the exhaust stream. The injected fluid reacts with NOx in the presence of a catalyst, typically vanadium, titanium or zeolite-based, to form nitrogen and water, thus significantly lowering NOx emissions.
