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ClearNOx®, the solution against crystallization

Car drivers, fleet managers or equipment operators can deal with costly, unexpected maintenance if their vehicles’ Selective Catalytic Reduction Systems (SCR) stop working properly. To avoid this type of issues, TotalEnergies experts have created an innovative additive-enhanced AdBlue® solution, ClearNOx®.


Šta je ClearNOx®?What is ClearNOx®?

Like the DEF, ClearNOx® is a ready-to-use urea solution, which allows operate the SCR treatment system nitrogen oxides (NOx). But ClearNOx® goes further: Thanks to its exclusive formula as a result of TotalEnergies Research, ClearNOx® prevents downtime risks by stopping crystallization in the SCR system.


What is an AdBlue®?

AdBlue® is an aqueous product, comprised of 32.5% high purity urea and of 67.5% deionized water, and it respects the ISO22241 norm. Urea is synthetically produced from ammonia and CO2 (carbon dioxide). AdBlue® can be used by vehicles equipped with the SCR technology (Selective Catalytic Reduction), such as heavy-duty trucks, buses, refuse collection vehicles, and, from September 2014, certain diesel passenger cars.

AdBlue®, and ClearNOx®, work to reduce the Nitrogen Oxide (NOx) emissions that can threaten human health and the environment.


Why choose ClearNOx®?

ClearNOx® is TotalEnergies patented product, suitable for both on-road and off-road vehicles and equipment fitted with SCR technology. The ready-to-use urea solution has been specially designed for SCR after-treatment systems and is compatible with all vehicle types, including cars, trucks, buses, and construction and agricultural equipment (API certified).

ClearNOx® prevents crystallization

  • Preserves the SCR system and the engine.
  • Reduces breakdowns and downtime of your fleet.
  • Contributes to controlling your fuel consumption.

ClearNOx® replaces AdBlue® 

  • Ready to use.
  • Enables compliance with emission level anti-pollution standards.

ClearNOx® is a patented application

  • Result of TotalEnergies Research.
  • Exclusive formula tested in collaboration with engine manufacturers and manufacturers.


How does ClearNOx® work?

Under certain operating conditions, the exhaust gas temperature is not sufficient for the reaction of DEF to complete. Cyanuric acid crystals can then form and obstruct the SCR system, causing immobilization of the vehicle. ClearNOx® ensures optimal spraying and thus allows complete reaction at a lower temperature, avoiding crystallization of the SCR system.


Testimonies for ClearNOx®

Watch below the members of Peugeot Club 3008-5008 talking about their experience of using ClearNOx® by TotalEnergies.

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