Nitrogen Oxides (NOx) consists predominantly of nitrogen oxide (NO) and nitrogen dioxide (NO2). The NOx emissions contribute to the formation of acid rain and ozone.
Technologies have been developed to remove NOx from process emissions. Selective non catalytic reduction (SNCR) and Selective catalytic reduction (SCR) are processes designed to reduced the emissions of oxides of nitrogen. NSCR systems were the first proven technologies to reduce NOx through stoichiometric combustion. Although this was a great advancement in the field of NOx reduction the SCR systems target the desired reduction and can operate at a large range of temperatures depending on the type of catalyst used. SCR with Ammonia (Anhydrous and Aqueous) and Urea can be used to achieve the desired reduction in NOx emissions.
Processes that may benefit from EPCON’s NOx abatement technology:
Chemical, manufacturing or recycling plants involved with:
Adipic acid
Nitric acid
Acreylonitrile /acetonitrile
Catalyst manuf plants
Gas turbine engines
Stationary engines
Fired heaters
Boilers
Coating operations that use nitrogen-bearing solvents such as z-methyl-pryollidone
Steel production operations with:
Reheat furnaces
Coke ovens
Taconite pellitization
Ammunition or military fuel recovery
The basic equations governing SCR reductions are as follows:
4NO + 4NH3 + O2 --------> 4N2 + 6H2O
2NO2 + 4NH3 + O2 --------> 3N2 + 6H2O
Complete integration of an EPCON SCR system includes the following:
SCR Catalysts
Ammonia injection grid
Ammonia control systems
NOx analyzers
Heat recovery equipment
Auxiliary burners
