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Shelf Life of Diesel Exhaust Fluid DEF

  This article is to help you understand the shelf life and sensitivity of DEF. Diesel Exhaust Fluid (DEF) is a blend of urea and de-ionized water produced to an international standard (ISO 22241). In other words, it is used to reduce the nitrogen oxide concentration in diesel exhaust emissions from diesel engines. However, it...

DEF Use in SCR

Selective Catalytic Reduction (SCR) Selective catalytic reduction, or SCR,  is a method of converting nitrogen oxides (NOx) into carbon dioxide (CO2) and water. Diesel exhaust fluid, or DEF, is added to a stream of exhaust gas where it reacts with the nitrogen oxides, breaking them down into harmless carbon dioxide and water. Since the late...

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