Automotive Grade Urea Solution Process: AdBlue and DEF

E-mailFacebookTwitterLinkedIn

The automotive urea AdBlue, also known by the generic name Diesel Exhaust Fluid (DEF), is the registered trademark for AUS32 (Aqueous Urea Solution 32.5 %). AdBlue is used as a reagent to reduce the harmful emissions from the internal diesel combustion engines. In order to use AdBlue, the vehicle must be equipped with a Selective Catalytic Reduction (SCR) system. The fluid is passed through the SCR and into the exhaust.

AdBlue is made by using urea mixed with demineralized water resulting in a 32.5 % aqueous urea solution. A stream of concentrated urea is blended with demineralized high purity water in a mixer. The ratio between the streams is carefully controlled to achieve the desired concentration.

Vaisala K-PATENTS® refractometer PR-43-GP is used to measure the concentration of urea solution AdBlue 32.5 % after the heat exchanger before it is transferred to storage tanks.

Download the application note in PDF by filling the form.

Go back to all Chemicals & Allied Products applications

Automotive Grade Urea Solution Process AdBlue and DEF

By submitting this form you acknowledge Vaisala’s Privacy Policy
You can manage your preferences here