Selective Catalytic Reduction – SCR (DeNOx)
TIER III regulations in ECAs from January 1st 2016 can at present only be achieved by using SCR Technology.
NOx is a generic term for mono-nitrogen oxides (NO and NO2) which are produced during the combustion process, especially at high temperatures.
In a SCR process nitrogen oxides react with ammonia or urea as reducing agent to form nitrogen (N2) and water vapour (H2O) which occur naturally in the atmosphere.
The SCR process is extremely flexible concerning flow rates and flue gas compositions with the exception of high contents of heavy metals, dust load and especially sulphur oxides which can react with the NH3 to ammonium hydrogen sulphate (NH4HSO4) that clogs the SCR surface and reduces its efficiency.
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In consequence Couple Systems offers the DryEGCS combined with a downstream integrated SCR as an attractive option, technically as well as economically.
The SCR process reliably achieves and secures a NOx reduction level of well above 90%.
The SCR technology is applied in a couple of thousands of combustion processes on land and has proven its long-term efficiency. More than 300 SCR systems are currently operated onboard of vessels.
Couple Systems’ R&D program incorporates optimization of conventional SCR technology and development of new catalysts to effectively meet the future demands of the shipping industry.
The SCR process reliably achieves and secures a NOx reduction level of well above 90%.
The SCR technology is applied in a couple of thousands of combustion processes on land and has proven its long-term efficiency. More than 300 SCR systems are currently operated onboard of vessels.
Couple Systems’ R&D program incorporates optimization of conventional SCR technology and development of new catalysts to effectively meet the future demands of the shipping industry.
