DeNOx SCR SYSTEMS – MOST EFFICIENT WAY OF CATALYTIC EXHAUST GAS PURIFICATION TO REDUCE NOx EMISSIONS AND PROTECT ENVIRONMENT
As of January 2021 all new built vessels have to achieve TIER III which today is only manageable by applying the SCR technology (Selective Catalytic Reduction). Through the combined effort and years of expertise of ERC and SPC on SCR systems, PRIMARINE is able to offer new and highly efficient DeNOx SCR systems for marine applications to remove nitrogen oxides from diesel engines exhaust gas.
PRIAMRINE offers you Low Pressure SCRs (LP-SCR) for 4-Stroke engines as well as High Pressure SCRs (HP-SCR) for 2-Stroke engines. Designed to meet demanding IMO TIER III emission levels and more these systems can be applied to commercial, marine or super yacht vessels.
PRIMARINE SCR systems for a high level of emissions:
SCR Marine applications are designed to be adapted to limited spaces on board and is suitable for propulsion engines both in vertical and horizontal installation.
NOx reduction process begins by injecting urea solution before the SCR reactor into the gas flow with proprietary self-cleaning urea spray nozzles.
PRIMARINE also delivers the urea solution to the vessel in all main bunker ports.
Gas and reagent mix passes through a variable number of catalyst layers, as it is appropriate for the required emission level. An option of bypass can be acquired in order to achieve a flexible usage of the SCR system.
The SCR technology is applied in thousands of combustion processes on land and has proven its long-term efficiency. More than 700 SCR systems are currently operated within the shipping industry.
PRIMARINE’s R & D program incorporates the optimization of conventional SCR technology as well as the development of new catalysts meeting the demands of the shipping industry more effectively.
In a SCR process nitrogen oxides are reacted stoichiometrically with ammonia or urea as reducing agent to form nitrogen (N2) and water vapour (H2O) which occur naturally in the atmosphere. The major part of the nitrogen oxides, which is generally present as NO, is reacted according to the following reaction:
4 NO + 4 NH3 + O2 ➟ 4 N2 + 6 H2O
As long as a mixture of NO and NO2 is present, the following somewhat faster reaction proceeds in parallel:
NO + NO2 + 2 NH3 ➟ 2 N2 + 3 H20