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Facts

 

 

What is TerraCair® Diesel Exhaust Fluid?

 

TerraCair® Ultrapure Diesel Exhaust Fluid is an ultrapure urea solution whose quality is certified by the American Petroleum Institute. Under the Clean Air Act, all diesel vehicles produced in the U.S. beginning January 1, 2010, are required to meet more stringent emissions standards. Most manufacturers are accomplishing this by using selective catalytic reduction (SCR) technology. DEF is a liquid urea solution that, when used in conjunction with SCR, converts harmful emissions to pure water and nitrogen.

 

How does an SCR system work?


The purpose of the SCR system is to reduce levels of NOx (oxides of nitrogen emitted
from engines) that are harmful to our health and the environment. SCR is the
aftertreatment technology that treats exhaust gas downstream of the engine. Small
quantities of diesel exhaust fluid (DEF) are injected into the exhaust upstream of a
catalyst, where it vaporizes and decomposes to form ammonia and carbon dioxide. Theammonia (NH3) is the desired product which in conjunction to the SCR catalyst, converts the NOx to harmless nitrogen (N2) and water (H2O).

 

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