A Review on Selective Catalytic Reduction for NOX Reduction

The energy requirement has increased rapidly all over the world due to industrialisation and the changes of
subsequent lifestyle. Most of this energy is generated from fossil fuels such as coal, natural gas, gasoline, and
diesel. Almost 90% of the present energy source is based on the combustion of fossil fuels and petroleum
based fuels. In the last few years, the environmental effects of pollutant emission from combustion sources
have becoming serious attention towards global warming.
Diesel engines are widely used in many areas like automobiles, locomotives, marine engines, power
generations etc., due to its high power output and thermal efficiency. Even though the diesel engines give more
benefits, the human discomfort only caused by pollutant emission of these engines has to be considered. The
major pollutant emissions of the diesel engines are NOx, particulate matters, and smoke, scoot particles