Selective catalytic reduction (SCR) is a means of converting nitrogen oxides (NOx) into diatomic nitrogen (N2) and water (H2O) with the aid of a catalyst. Nitrogen oxide (NOx) is a very harmful chemical to environment and public health. Along with smog, NOx contributes to respiratory problems and heart disease. Hence, for the sake of saving environment and better public health, SCR engine emission has to be taken seriously. Efficiency of SCR NOx reduction is as high as 95% or more. In addition to reducing NOx emissions, SCR engine control can also increase horse power and fuel efficiency. For today’s vehicles, fuel efficiency is always a point of concern, and fuel costs are definitely a consideration of businesses. If you want to improve your bottom line, prevent illness, and avoid smog, SCR technology is the way to go. Commercial selective catalytic reduction systems are typically found on large utility boilers, industrial boilers, and municipal solid waste boilers. More recent applications include diesel engines, such as those found on large ships, diesel locomotives, gas turbines, and even automobiles. With the help of Royal DEF, you can be a proud citizen to contribute in significant reduction of NOx , and thereby saving greening environment and helping society stay away from respiratory and heart problems.