SCR / SNCR

EPA regulations support or require NOx control installations to achieve the lowest emissions level possible. Two of the solutions for post-combustion control systems are Selective Non-Catalytic Reduction (SNCR) and Selective Catalytic Reduction (SCR).   Both are of the most cost-effective and fuel-efficient technologies used to reduce stationary source emissions. Utilizing our field experience and injection technology, Dustex offers complete SCR and SNCR NOx control systems for various plants. State-of-the-art design, simulation, and technology ensure advantages with results that will surpass your requirements and meet guarantees.

EPA regulations support or require NOx control installations to achieve the lowest emissions level possible. Two of the solutions for post-combustion control systems are Selective Non-Catalytic Reduction (SNCR) and Selective Catalytic Reduction (SCR).   Both are of the most cost-effective and fuel-efficient technologies used to reduce stationary source emissions. Utilizing our field experience and injection technology, Dustex offers complete SCR and SNCR NOx control systems for various plants. State-of-the-art design, simulation, and technology ensure advantages with results that will surpass your requirements and meet guarantees.

SNCR Testing

Dustex has the capability to provide NOx testing via our portable ammonia injection system and stack testing via our CEMS (continuous emissions monitoring system) trailer.

Nitrogen Oxides (NOx) Removal

EPA regulations support or require NOx control installations to achieve the lowest emissions level possible. One of the solutions for post-combustion control systems is Selective Non-Catalytic Reduction (SNCR).   With this technology, NOx is reduced to nitrogen (N2) and water (H2O) through a series of reactions with a reagent (or reagents) injected into the flue gas.  The most common reagents used in commercial applications are ammonia and urea.

The stoichiometric reaction using ammonia for a selective reduction process is:

4NO + 4NH3 + O2 → 4N2 + 6H2O

2NO2 + 4NH3 + O2 → 3N2 + 6H2O

NO + NO2 + 2NH3 → 2N2 + 3H2O

No2 Molecule
Nitrogen Oxide

Chemical Reaction

Chemical Reaction

Approx. 90-95% NO, 5-10% NO2

Utilizing our field experience and injection technology, Dustex offers complete SNCR NOx control systems for various plants.  State-of-the-art design, simulation and technology ensure advantages with results that will surpass your requirements and will meet guarantees.

Temperature Range

SNCR Process

The optimal temperature range for the SNCR injection of ammonia hydroxide is 900°C-1000°C (1650°F-1830°F) and for urea it is 950°C – 1050°C (1740°F-1920°F).

In addition to the temperature and other factors, the correct ammonia distribution is of importance for ensuring that the process occurs under optimal conditions:  The injected droplets must be of optimal size, large enough to provide sufficient impulse and penetration into the flue gas to achieve homogeneous coverage and small enough to reliably evaporate in the required zone.  Dustex’s injection system effectively meets these requirements and can handle wide fluctuations of NOx concentration in the flue gas.

Dustex Scope for DeNOx Systems

Our team of project engineers and designers work closely with your engineering team to ensure that all specifications and requirements of the SNCR are seamlessly integrated to the system.  Dustex’s NOx control systems can be supplied as turnkey solutions including pump & control skids, injection lances & atomization nozzles, control equipment & PLC, catalyst (SCR only), NH₃ storage tank, and truck unloading station.

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Dustex - Clean Air Technologies

Dustex is a global supplier of engineered systems that reduce air emissions and improve operational efficiencies. We are at the forefront of engineered solutions for clean air technologies with an exceptional and experienced staff. Our outstanding service combined with our wide breadth of technology allows us to provide practical and economical solutions for our customers that fit their unique needs.

 

Contact Details

Dustex - Clean Air Technologies

Corporate Office

60 Chastain Center Blvd NW, Ste 60
Kennesaw, GA 30144 USA

Send us a message

Dustex is a global supplier of engineered systems that reduce air emissions and improve operational efficiencies. We are at the forefront of engineered solutions for clean air technologies with an exceptional and experienced staff. Our outstanding service combined with our wide breadth of technology allows us to provide practical and economical solutions for our customers that fit their unique needs.

Contact Details

Corporate Office 
60 Chastain Center Blvd NW, Ste 60
Kennesaw, GA 30144 USA

info@dustex.com

770-429-5575

Send us a message

© 2018 Dustex - Clean Air Technologies. All Rights Reserved.

EPA regulations support or require NOx control installations to achieve the lowest emissions level possible. Two of the solutions for post-combustion control systems are Selective Non-Catalytic Reduction (SNCR) and Selective Catalytic Reduction (SCR).   Both are of the most cost-effective and fuel-efficient technologies used to reduce stationary source emissions. Utilizing our field experience and injection technology, Dustex offers complete SCR and SNCR NOx control systems for various plants. State-of-the-art design, simulation, and technology ensure advantages with results that will surpass your requirements and meet guarantees.

© 2018 Dustex - Clean Air Technologies. All Rights Reserved.