Emissions technology

A diesel oxidation catalyst (DOC) is an aftertreatment component that is designed to convert carbon monoxide (CO) and hydrocarbons into carbon dioxide (CO2) and water. The device is used on all our EU Stage IV/U.S. EPA Tier 4 Final products – from the 400F through to the 1206F.

It doesn’t matter if you are running your diesel engine on the road or off, you must still adhere to strict emissions standards. A diesel oxidation catalyst (DOC) is an aftertreatment device that can help you do that, as it effectively turns CO and hydrocarbons into CO2 and water vapour.

The DOC is part of the technology we offer to assist you in meeting Stage IV and Tier 4 Interim/Final emissions standards. It breaks down pollutants in the exhaust stream from a diesel engine, helping to reduce particulate matter (PM). It’s similar to a catalytic converter in a car.

Both carbon monoxide and hydrocarbons are converted in the DOC to carbon dioxide and water vapour. Exhaust gases are optimised so that they can perform in other systems in the aftertreatment, such as the selective catalytic reduction (SCR) or diesel particulate filter (DPF).


How the diesel oxidation catalyst (DOC) works

DOC (Diesel Oxidation Catalyst) & SCR (Selective Catalytic Reduction)

What are the strengths of our solution?

Our DOCs provide a simple solution for original equipment manufacturers (OEMs). They’re easy to install and maintain and don’t require any additional control from the machine operator.

In many cases, the need for a muffler can be eliminated, and our DOCs can also allow for a wider ratings envelope. Concentrations of NO and NO2 can be optimised in the exhaust stream, and if your engine has SCR, this will make it more efficient and reduce diesel exhaust fluid (DEF) consumption requirements.

Using a DOC also enables additional passive regeneration in DPF systems.

Fast facts

  • Converts carbon monoxide (CO) into carbon dioxide (CO2) and water
  • Can eliminate muffler requirement
  • Harmful particulates are oxidised into harmless products