NOx Reduction Solutions

NOx Reduction Solutions for Industrial Combustion

We assess your combustion process, operating conditions and emission requirements to develop a practical NOx reduction solution, from process optimization to SCR and SNCR systems

  • Engineering
  • Turnkey
  • Retrofit
  • Commissioning
  • After-sales Support
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SCR system installed at an industrial plant

Is Your Process
Facing a NOx
Emission Challenge?

It is not just about regulatory compliance
It is about the future of a sustainable business

Effective NOx management helps reduce risks, improve efficiency, and build trust in your organization.

Request a NOx Assessment

Understanding NOx

What is NOx: nitrogen + oxygen + combustion = nitrogen oxides
What’s NOx?

NOx (Nitrogen Oxides) refers to a group of nitrogen oxide gases, such as NO and NO₂, primarily generated by combustion processes in factories or engines. It is formed through reactions between nitrogen in the air and oxygen. It is commonly found in industrial combustion equipment and affects both environmental performance and regulatory compliance.

Hazards and Impacts of NOx

NOx impacts: smog, acid rain, PM2.5/PM10, health risk

Sources & Applications

Prolific’s understanding of a wide range of thermal processes and equipment forms the foundation of our thermal engineering expertise, enabling us to design NOx reduction solutions that are appropriate, practical, and aligned with the specific constraints of each plant.

Gas turbine & HRSG, industrial boiler, process furnace, kiln
Incinerator, engine & generator, thermal processing equipment

Selective Catalytic Reduction (SCR) System Integrated in Power Plant Flue Gas Treatment

SCR integrated in a power plant flue-gas treatment train

NOx Reduction Approach

We start from a real understanding of the site, analyse where the NOx is coming from, and develop an approach that works on all three fronts: technically, against the budget, and in the project documentation.

Seven step NOx reduction approach, from data collection through to ongoing support

What we look at

  • Flow rate, temperature and the properties of the flue gas at each point
  • The technology that suits the plant, taking in layout, pressure drop, retrofit and maintenance
  • Performance after commissioning, with continuing support from an experienced team
Technology selection: SCR compared with SNCR

SCR Technologies

Selective Catalytic Reduction

SCR flow: flue gas, reagent injection, catalyst reactor, clean gas

Principle of the SCR

SCR catalyst and NH3 injection
Diffusion, adsorption, reaction and desorption on the catalyst surface
Figure. Principle of deducting NOx from SCR using catalyst

Surface Of Catalyst

4NO + 4NH₃ + O₂ → 4N₂ + 6H₂O
6NO + 4NH₃ → 5N₂ + 6H₂O
6NO₂ + 8NH₃ → 7N₂ + 12H₂O
2NO₂ + 4NH₃ + O₂ → 3N₂ + 6H₂O

Most of the nitrogen oxide abatement processes currently applied are selective catalytic reduction (SCR) processes that selectively reduce nitrogen oxides by using ammonia (NH3) or urea as reducing agent, and it is a process that has had many commercial achievements since it was first proposed. The main mechanisms of the entire process are as follows.

We has the best catalyst and technologies for SCR process

SCR Performance Guarantee

SCR skid
> 90%De-NOx Efficiency
< 5%Ammonia Slip

Main Components of the SCR System

Storage tank & pumping, seal tank, vaporization system, ammonia injection grid, SCR catalyst reactor, analyzer and control system
Reagent storage tanksReagent storage tanks

SNCR Technologies

Selective Non-Catalytic Reduction

Computational Fluid Dynamics

CFD simulation of the furnace and the installed SNCR injection lances

Catalyst performance in the SCR system

Key Features:

  • Lightweight Design
  • Low Pressure Drop
  • Thermal Stability
Metal foam and corrugated catalyst structures
Metal foam base (LNG Fuel only)
Metal foamMetal foam close-up
Metal corrugate support SCR Catalyst
Corrugated catalystCorrugated catalyst close-up

Research & Development

  • Metal Alloy Corrugated Type (Rapid Activation)
NOx conversion (%) against temperature
Metal Alloy corrugated

Project-specific design considerations

Target NOx, required removal efficiency, operating temperature, allowable pressure drop, ammonia slip, catalyst volume and expected service life, reagent consumption. These values vary by project and must be determined from actual operating data. They are not a single guaranteed number for all applications.