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DeNox Systems

Tropical Leaves

The importance of reducing NOx emissions in the frame of the Global Green New Deal

Our contribution to the environmental context

NOX contributes to acid deposition and eutrophication of soil and water. The subsequent impacts of acid deposition can be significant, including adverse effects on aquatic ecosystems in rivers and lakes and damage to forests, crops and other vegetation. Eutrophication can lead to severe reductions in water quality with subsequent impacts including decreased biodiversity, changes in species composition and dominance, and toxicity effects. NO2 is associated with adverse effects on human health, as at high concentrations it can cause inflammation of the airways and reduced lung function, increasing susceptibility to respiratory infection. It also contributes to the formation of secondary particulate aerosols and tropospheric ozone in the atmosphere, both of which are important air pollutants due to their adverse impacts on human health and other climate effects.

Image by Greg Rosenke

DeNox System Applications


  • Industrial Boilers

  • Fuel gas 

  • Oil and crude oil firing


Heat Recovery Boilers


Simple Cycle Gas Turbine


Waste Heat Recovery Boilers


Incinerator Plant for Municipal Refuse and Industrial Waste


Biomass Boilers or Furnaces


Cement Kiln

Image by Miha Rekar

Duscon approach to DeNox systems design

A new technology with the usual high quality

DUSCON provides the most suitable catalyst for the specific process such as, HONEYCOMB or CORRUGATED type catalyst for NOx reduction with HIGHT DUST or LOW DUST installation.


DUSCON provides a "tailor made" installation either on new flue gas treatment or retrofitting of an existing flue gas treatment.

We can therefore fulfill any special requirements.

DUSCON supports the client with all the preliminary studies with the aim to follow the client in identifying the best and cost effectiveness configuration.

Engineering, manufacturing, commissioning of De-NOx systems
  • Selective Non Catalytic Reduction equipment 

  • Selective Catalytic Reduction equipment 

  • Consulting to identify the right configuration 

  • Gas Boilers, Fired Heaters, Steam Reformers 

  • HRSG Boilers 

  • Waste to Energy 

  • Biomass 

Image by Martin Grincevschi
Selective Catalytic Reduction
Temperature range & efficiency

SCR process involves injecting either an ammonia or urea reducing agent into the flue gas flow where a temperature of between 200°C - 550°C exists or is expected.

The major difference (compared to SNCR) with SCR is that a catalyst is used, which accelerates the chemical reaction and allows it to occur at lower temperatures.

SCR technology, properly designed, is capable of achieving >93% NOx reduction.

Image by Simone Hutsch
Selective Catalytic Reduction

Injection technology inside the process

External evaporation of ammonia

Evaporation of the reagent carried out outside the flue gas ducting applying an AFCU, Ammonia Flow Control Unit and AIG, Ammonia Injection Grid upstream the catalyst.

Direct injection of ammonia into the flue gas

- Lower CAPEX, no AFCU and AIG needed.

- Direct injection and evaporation of reagent into the flue gas duct.

- Using the flow and heat for distribution and mixing.

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