What are Selective Catalytic Reduction and Urea Injection?
Injection systems improve engine performance , so why shouldn’t a similar mechanism enhance your exhaust output? Instead of fuel injection , however, the tech we’re about to discuss injects Urea into diesel exhaust streams. Buckle in while we explain what’s known as Selective Catalytic Reduction and Urea injection . It’s a chemical process that’s been used in industrial diesel engines for some time now, and it’s also found in car exhaust systems . What is Selective Catalytic Reduction (SCR)? Selective catalytic reduction technology uses an active chemical injectant as an emission mitigation solution. Specifically, the catalytic agent targets the poisonous nitrogen oxide (Nox) fumes in your exhaust , which is why the technology earns the “selective” prefix. Down among the exhaust pipes , a dosing tank is injecting a gaseous reductant into the engine byproduct stream. A redox reaction takes place between the reductant and the nitrogen oxide. Basically, through some invisible