Nitrogen oxides (NOx) abatement structures are vital in purposes that end result in having greater tiers of NOx to assist decrease the pollutant, consequently diminishing the quantity of SMOG and reducing the dangerous consequences on the environment. Selective catalytic reduction, or SCR, is a method the place a catalyst is introduced to nitrogen oxide (NO) gasoline by way of ammonia injection to convert it into diatomic nitrogen (N2) and water (H20). Fans are used in this procedures to furnish air go with the flow via the ammonia injection skid.