Catalyst, Selective Catalytic Reduction (SCR): Description
The Selective Catalytic Reduction (SCR) (2) is a catalyst element made of copper zeolite used in reducing nitrous oxide gases (NOx) to an element of nitrogen. By injecting a Diesel Exhaust Fluid (DEF) solution upstream of a catalyst, the DEF solution will vaporize and decompose to form ammonia and carbon dioxide. When the ammonia vapor reacts with the NOx gas, it converts it to a harmless nitrogen and water by-product.