Industrial Diesel Oxidation Catalyst (DOC) units oxidize hydrocarbons (HC) and carbon monoxide (CO) in stationary engine and power generation exhaust systems, while helping control odor and visible emissions, delivering simple, reliable emissions control with long service life and low maintenance requirements.

Where They’re Used

Standalone for lighter-duty applications or paired with DPF or SCR systems for more stringent regulations, including:

• Stationary power generators in urban areas

• Air quality non-attainment zones

• Industrial sites with permit limits

Benefits

• Simple, reliable design with long service life

• Strong performance in continuous or variable-load conditions

• Low maintenance requirements

When DOC is Needed

• To Meet Air Emissions Regulations: Limits on CO, HC/VOCs, diesel odor, and visible smoke.

• For Emergency or Prime Power Generators in Regulated Areas: Hospitals, data centers, airports, or sites under EPA, EU, or local environment oversight.

• Upstream of DPF: Converts NO to NO₂ for passive regeneration, reduces HC that could foul the filter, and controls exhaust temperature

• Reduce Exhaust Odor and Improve Air Quality Near People: Exhaust outlets near buildings, air intakes, or populated areas.

• For Fuel Quality or Engine Operation Issues: Low load operation, cold starts, or high HC fuel.

Typical Reductions

• CO: 80-90%

• HC/VOCs: 50-90%

• Odor: Significant

• PM (organic fraction only): 20-40%